./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor889806715
<...>
Warning: Permanently added '10.128.1.160' (ED25519) to the list of known hosts.
execve("./syz-executor889806715", ["./syz-executor889806715"], 0x7ffd46866eb0 /* 10 vars */) = 0
brk(NULL) = 0x555555807000
brk(0x555555807d00) = 0x555555807d00
arch_prctl(ARCH_SET_FS, 0x555555807380) = 0
set_tid_address(0x555555807650) = 5065
set_robust_list(0x555555807660, 24) = 0
rseq(0x555555807ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor889806715", 4096) = 27
getrandom("\x35\x54\x07\x5c\xb7\xb4\x5a\x95", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555555807d00
brk(0x555555828d00) = 0x555555828d00
brk(0x555555829000) = 0x555555829000
mprotect(0x7f78c7144000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
mkdir("./syzkaller.OHt4I4", 0700) = 0
chmod("./syzkaller.OHt4I4", 0777) = 0
chdir("./syzkaller.OHt4I4") = 0
mkdir("./0", 0777) = 0
[ 107.029192][ T27] audit: type=1400 audit(1702325130.696:86): avc: denied { execmem } for pid=5065 comm="syz-executor889" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
[ 107.082219][ T27] audit: type=1400 audit(1702325130.746:87): avc: denied { read write } for pid=5065 comm="syz-executor889" name="loop0" dev="devtmpfs" ino=648 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1
[ 107.107364][ T27] audit: type=1400 audit(1702325130.746:88): avc: denied { open } for pid=5065 comm="syz-executor889" path="/dev/loop0" dev="devtmpfs" ino=648 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555807650) = 5067
./strace-static-x86_64: Process 5067 attached
[pid 5067] set_robust_list(0x555555807660, 24) = 0
[pid 5067] chdir("./0") = 0
[pid 5067] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5067] setpgid(0, 0) = 0
[pid 5067] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5067] write(3, "1000", 4) = 4
[pid 5067] close(3) = 0
[pid 5067] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5067] memfd_create("syzkaller", 0) = 3
[pid 5067] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5067] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5067] munmap(0x7f78bec91000, 138412032) = 0
[pid 5067] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 107.132758][ T27] audit: type=1400 audit(1702325130.776:89): avc: denied { ioctl } for pid=5065 comm="syz-executor889" path="/dev/loop0" dev="devtmpfs" ino=648 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1
[pid 5067] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5067] close(3) = 0
[pid 5067] mkdir("./file1", 0777) = 0
[ 107.184528][ T5067] loop0: detected capacity change from 0 to 512
[ 107.198725][ T27] audit: type=1400 audit(1702325130.866:90): avc: denied { mounton } for pid=5067 comm="syz-executor889" path="/root/syzkaller.OHt4I4/0/file1" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[ 107.202028][ T5067] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5067] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5067] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5067] chdir("./file1") = 0
[pid 5067] ioctl(4, LOOP_CLR_FD) = 0
[pid 5067] close(4) = 0
[ 107.244167][ T5067] EXT4-fs (loop0): 1 truncate cleaned up
[ 107.249976][ T5067] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[ 107.264824][ T27] audit: type=1400 audit(1702325130.936:91): avc: denied { mount } for pid=5067 comm="syz-executor889" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[pid 5067] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 107.335229][ T27] audit: type=1400 audit(1702325130.996:92): avc: denied { setattr } for pid=5067 comm="syz-executor889" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1
[pid 5067] creat("./file1", 000) = 4
[pid 5067] exit_group(0) = ?
[pid 5067] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5067, si_uid=0, si_status=0, si_utime=0, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./0/binderfs") = 0
[ 107.373605][ T27] audit: type=1400 audit(1702325131.036:93): avc: denied { write } for pid=5067 comm="syz-executor889" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1
[ 107.396975][ T27] audit: type=1400 audit(1702325131.046:94): avc: denied { open } for pid=5067 comm="syz-executor889" path="/root/syzkaller.OHt4I4/0/file1/file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1
umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./0/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
[ 107.461757][ T27] audit: type=1400 audit(1702325131.126:95): avc: denied { unmount } for pid=5065 comm="syz-executor889" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[ 107.482789][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./0/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./0/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./0") = 0
mkdir("./1", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5070 attached
, child_tidptr=0x555555807650) = 5070
[pid 5070] set_robust_list(0x555555807660, 24) = 0
[pid 5070] chdir("./1") = 0
[pid 5070] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5070] setpgid(0, 0) = 0
[pid 5070] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5070] write(3, "1000", 4) = 4
[pid 5070] close(3) = 0
[pid 5070] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5070] memfd_create("syzkaller", 0) = 3
[pid 5070] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5070] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5070] munmap(0x7f78bec91000, 138412032) = 0
[pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5070] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5070] close(3) = 0
[pid 5070] mkdir("./file1", 0777) = 0
[ 107.701960][ T5070] loop0: detected capacity change from 0 to 512
[ 107.719373][ T5070] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 107.737331][ T5070] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5070] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5070] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5070] chdir("./file1") = 0
[pid 5070] ioctl(4, LOOP_CLR_FD) = 0
[pid 5070] close(4) = 0
[ 107.743142][ T5070] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5070] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5070] creat("./file1", 000) = 4
[pid 5070] exit_group(0) = ?
[pid 5070] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5070, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 s */} ---
umount2("./1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./1/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./1/binderfs") = 0
umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./1/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./1/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
[ 107.841303][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./1/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./1") = 0
mkdir("./2", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5072 attached
, child_tidptr=0x555555807650) = 5072
[pid 5072] set_robust_list(0x555555807660, 24) = 0
[pid 5072] chdir("./2") = 0
[pid 5072] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5072] setpgid(0, 0) = 0
[pid 5072] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5072] write(3, "1000", 4) = 4
[pid 5072] close(3) = 0
[pid 5072] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5072] memfd_create("syzkaller", 0) = 3
[pid 5072] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5072] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5072] munmap(0x7f78bec91000, 138412032) = 0
[pid 5072] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5072] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5072] close(3) = 0
[pid 5072] mkdir("./file1", 0777) = 0
[ 108.048974][ T5072] loop0: detected capacity change from 0 to 512
[ 108.077922][ T5072] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5072] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5072] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5072] chdir("./file1") = 0
[pid 5072] ioctl(4, LOOP_CLR_FD) = 0
[pid 5072] close(4) = 0
[pid 5072] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5072] creat("./file1", 000) = 4
[ 108.096526][ T5072] EXT4-fs (loop0): 1 truncate cleaned up
[ 108.102208][ T5072] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5072] exit_group(0) = ?
[pid 5072] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5072, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./2", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./2", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./2/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./2/binderfs") = 0
umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./2/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./2/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
[ 108.247153][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./2/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./2") = 0
mkdir("./3", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5074 attached
, child_tidptr=0x555555807650) = 5074
[pid 5074] set_robust_list(0x555555807660, 24) = 0
[pid 5074] chdir("./3") = 0
[pid 5074] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5074] setpgid(0, 0) = 0
[pid 5074] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5074] write(3, "1000", 4) = 4
[pid 5074] close(3) = 0
[pid 5074] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5074] memfd_create("syzkaller", 0) = 3
[pid 5074] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5074] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5074] munmap(0x7f78bec91000, 138412032) = 0
[pid 5074] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5074] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5074] close(3) = 0
[pid 5074] mkdir("./file1", 0777) = 0
[ 108.444363][ T5074] loop0: detected capacity change from 0 to 512
[ 108.471992][ T5074] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5074] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5074] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5074] chdir("./file1") = 0
[pid 5074] ioctl(4, LOOP_CLR_FD) = 0
[pid 5074] close(4) = 0
[ 108.489633][ T5074] EXT4-fs (loop0): 1 truncate cleaned up
[ 108.495329][ T5074] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5074] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5074] creat("./file1", 000) = 4
[pid 5074] exit_group(0) = ?
[pid 5074] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5074, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./3", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./3", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./3/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./3/binderfs") = 0
umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./3/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./3/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
[ 108.665022][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
rmdir("./3/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./3") = 0
mkdir("./4", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5076 attached
<unfinished ...>
[pid 5076] set_robust_list(0x555555807660, 24 <unfinished ...>
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5076
[pid 5076] <... set_robust_list resumed>) = 0
[pid 5076] chdir("./4") = 0
[pid 5076] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5076] setpgid(0, 0) = 0
[pid 5076] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5076] write(3, "1000", 4) = 4
[pid 5076] close(3) = 0
[pid 5076] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5076] memfd_create("syzkaller", 0) = 3
[pid 5076] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5076] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5076] munmap(0x7f78bec91000, 138412032) = 0
[pid 5076] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5076] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5076] close(3) = 0
[pid 5076] mkdir("./file1", 0777) = 0
[ 108.884150][ T5076] loop0: detected capacity change from 0 to 512
[ 108.915949][ T5076] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5076] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5076] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5076] chdir("./file1") = 0
[pid 5076] ioctl(4, LOOP_CLR_FD) = 0
[pid 5076] close(4) = 0
[ 108.933446][ T5076] EXT4-fs (loop0): 1 truncate cleaned up
[ 108.939183][ T5076] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5076] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5076] creat("./file1", 000) = 4
[pid 5076] exit_group(0) = ?
[pid 5076] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5076, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./4", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./4/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./4/binderfs") = 0
umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./4/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./4/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[ 109.097911][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./4/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./4") = 0
mkdir("./5", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5078 attached
, child_tidptr=0x555555807650) = 5078
[pid 5078] set_robust_list(0x555555807660, 24) = 0
[pid 5078] chdir("./5") = 0
[pid 5078] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5078] setpgid(0, 0) = 0
[pid 5078] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5078] write(3, "1000", 4) = 4
[pid 5078] close(3) = 0
[pid 5078] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5078] memfd_create("syzkaller", 0) = 3
[pid 5078] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5078] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5078] munmap(0x7f78bec91000, 138412032) = 0
[pid 5078] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5078] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5078] close(3) = 0
[pid 5078] mkdir("./file1", 0777) = 0
[ 109.353015][ T5078] loop0: detected capacity change from 0 to 512
[ 109.368883][ T5078] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 109.385917][ T5078] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5078] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5078] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5078] chdir("./file1") = 0
[pid 5078] ioctl(4, LOOP_CLR_FD) = 0
[pid 5078] close(4) = 0
[ 109.391623][ T5078] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5078] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5078] creat("./file1", 000) = 4
[pid 5078] exit_group(0) = ?
[pid 5078] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5078, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./5", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./5/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./5/binderfs") = 0
umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./5/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
[ 109.538113][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./5/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./5/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./5") = 0
mkdir("./6", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5080 attached
, child_tidptr=0x555555807650) = 5080
[pid 5080] set_robust_list(0x555555807660, 24) = 0
[pid 5080] chdir("./6") = 0
[pid 5080] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5080] setpgid(0, 0) = 0
[pid 5080] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5080] write(3, "1000", 4) = 4
[pid 5080] close(3) = 0
[pid 5080] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5080] memfd_create("syzkaller", 0) = 3
[pid 5080] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5080] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5080] munmap(0x7f78bec91000, 138412032) = 0
[pid 5080] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5080] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5080] close(3) = 0
[pid 5080] mkdir("./file1", 0777) = 0
[ 109.759648][ T5080] loop0: detected capacity change from 0 to 512
[ 109.786383][ T5080] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 109.803485][ T5080] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5080] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5080] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5080] chdir("./file1") = 0
[pid 5080] ioctl(4, LOOP_CLR_FD) = 0
[pid 5080] close(4) = 0
[pid 5080] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 109.809389][ T5080] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5080] creat("./file1", 000) = 4
[pid 5080] exit_group(0) = ?
[pid 5080] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5080, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./6", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./6/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./6/binderfs") = 0
umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./6/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[ 109.958982][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
openat(AT_FDCWD, "./6/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./6/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./6") = 0
mkdir("./7", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5082 attached
, child_tidptr=0x555555807650) = 5082
[pid 5082] set_robust_list(0x555555807660, 24) = 0
[pid 5082] chdir("./7") = 0
[pid 5082] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5082] setpgid(0, 0) = 0
[pid 5082] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5082] write(3, "1000", 4) = 4
[pid 5082] close(3) = 0
[pid 5082] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5082] memfd_create("syzkaller", 0) = 3
[pid 5082] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5082] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5082] munmap(0x7f78bec91000, 138412032) = 0
[pid 5082] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5082] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5082] close(3) = 0
[pid 5082] mkdir("./file1", 0777) = 0
[ 110.228770][ T5082] loop0: detected capacity change from 0 to 512
[ 110.255228][ T5082] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 110.273010][ T5082] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5082] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5082] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5082] chdir("./file1") = 0
[pid 5082] ioctl(4, LOOP_CLR_FD) = 0
[pid 5082] close(4) = 0
[pid 5082] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5082] creat("./file1", 000) = 4
[ 110.278789][ T5082] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5082] exit_group(0) = ?
[pid 5082] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5082, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./7", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./7", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./7/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./7/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./7/binderfs") = 0
umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./7/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./7/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[ 110.431179][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./7/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./7") = 0
mkdir("./8", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5085 attached
<unfinished ...>
[pid 5085] set_robust_list(0x555555807660, 24) = 0
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5085
[pid 5085] chdir("./8") = 0
[pid 5085] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5085] setpgid(0, 0) = 0
[pid 5085] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5085] write(3, "1000", 4) = 4
[pid 5085] close(3) = 0
[pid 5085] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5085] memfd_create("syzkaller", 0) = 3
[pid 5085] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5085] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5085] munmap(0x7f78bec91000, 138412032) = 0
[pid 5085] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5085] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5085] close(3) = 0
[pid 5085] mkdir("./file1", 0777) = 0
[pid 5085] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5085] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5085] chdir("./file1") = 0
[pid 5085] ioctl(4, LOOP_CLR_FD) = 0
[pid 5085] close(4) = 0
[ 110.704420][ T5085] loop0: detected capacity change from 0 to 512
[ 110.715832][ T5085] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 110.732821][ T5085] EXT4-fs (loop0): 1 truncate cleaned up
[ 110.738589][ T5085] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5085] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5085] creat("./file1", 000) = 4
[pid 5085] exit_group(0) = ?
[pid 5085] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5085, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./8", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./8", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./8/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./8/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./8/binderfs") = 0
umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./8/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./8/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
[ 110.867599][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./8/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./8") = 0
mkdir("./9", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5087 attached
, child_tidptr=0x555555807650) = 5087
[pid 5087] set_robust_list(0x555555807660, 24) = 0
[pid 5087] chdir("./9") = 0
[pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5087] setpgid(0, 0) = 0
[pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5087] write(3, "1000", 4) = 4
[pid 5087] close(3) = 0
[pid 5087] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5087] memfd_create("syzkaller", 0) = 3
[pid 5087] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5087] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5087] munmap(0x7f78bec91000, 138412032) = 0
[pid 5087] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5087] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5087] close(3) = 0
[pid 5087] mkdir("./file1", 0777) = 0
[ 111.078915][ T5087] loop0: detected capacity change from 0 to 512
[ 111.094779][ T5087] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 111.112411][ T5087] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5087] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5087] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5087] chdir("./file1") = 0
[pid 5087] ioctl(4, LOOP_CLR_FD) = 0
[pid 5087] close(4) = 0
[pid 5087] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 111.118204][ T5087] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5087] creat("./file1", 000) = 4
[pid 5087] exit_group(0) = ?
[pid 5087] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5087, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./9", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./9", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./9/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./9/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./9/binderfs") = 0
umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./9/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./9/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./9/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
[ 111.257747][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
rmdir("./9") = 0
mkdir("./10", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5090 attached
, child_tidptr=0x555555807650) = 5090
[pid 5090] set_robust_list(0x555555807660, 24) = 0
[pid 5090] chdir("./10") = 0
[pid 5090] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5090] setpgid(0, 0) = 0
[pid 5090] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5090] write(3, "1000", 4) = 4
[pid 5090] close(3) = 0
[pid 5090] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5090] memfd_create("syzkaller", 0) = 3
[pid 5090] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5090] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5090] munmap(0x7f78bec91000, 138412032) = 0
[pid 5090] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5090] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5090] close(3) = 0
[pid 5090] mkdir("./file1", 0777) = 0
[ 111.431962][ T5090] loop0: detected capacity change from 0 to 512
[ 111.451266][ T5090] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 111.469184][ T5090] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5090] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5090] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5090] chdir("./file1") = 0
[pid 5090] ioctl(4, LOOP_CLR_FD) = 0
[pid 5090] close(4) = 0
[pid 5090] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5090] creat("./file1", 000) = 4
[pid 5090] exit_group(0) = ?
[pid 5090] +++ exited with 0 +++
[ 111.475233][ T5090] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5090, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./10", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./10", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./10/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./10/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./10/binderfs") = 0
umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./10/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./10/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
[ 111.617657][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./10/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./10") = 0
mkdir("./11", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5092 attached
<unfinished ...>
[pid 5092] set_robust_list(0x555555807660, 24 <unfinished ...>
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5092
[pid 5092] <... set_robust_list resumed>) = 0
[pid 5092] chdir("./11") = 0
[pid 5092] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5092] setpgid(0, 0) = 0
[pid 5092] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5092] write(3, "1000", 4) = 4
[pid 5092] close(3) = 0
[pid 5092] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5092] memfd_create("syzkaller", 0) = 3
[pid 5092] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5092] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5092] munmap(0x7f78bec91000, 138412032) = 0
[pid 5092] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5092] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5092] close(3) = 0
[pid 5092] mkdir("./file1", 0777) = 0
[ 111.836591][ T5092] loop0: detected capacity change from 0 to 512
[ 111.852462][ T5092] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 111.870240][ T5092] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5092] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5092] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5092] chdir("./file1") = 0
[pid 5092] ioctl(4, LOOP_CLR_FD) = 0
[pid 5092] close(4) = 0
[ 111.876068][ T5092] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5092] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5092] creat("./file1", 000) = 4
[pid 5092] exit_group(0) = ?
[pid 5092] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5092, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./11", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./11", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./11/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./11/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./11/binderfs") = 0
umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./11/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./11/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./11/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./11") = 0
mkdir("./12", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
[ 112.044530][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555807650) = 5094
./strace-static-x86_64: Process 5094 attached
[pid 5094] set_robust_list(0x555555807660, 24) = 0
[pid 5094] chdir("./12") = 0
[pid 5094] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5094] setpgid(0, 0) = 0
[pid 5094] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5094] write(3, "1000", 4) = 4
[pid 5094] close(3) = 0
[pid 5094] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5094] memfd_create("syzkaller", 0) = 3
[pid 5094] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5094] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5094] munmap(0x7f78bec91000, 138412032) = 0
[pid 5094] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5094] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5094] close(3) = 0
[pid 5094] mkdir("./file1", 0777) = 0
[pid 5094] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5094] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5094] chdir("./file1") = 0
[pid 5094] ioctl(4, LOOP_CLR_FD) = 0
[pid 5094] close(4) = 0
[ 112.199530][ T5094] loop0: detected capacity change from 0 to 512
[ 112.211109][ T5094] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 112.229034][ T5094] EXT4-fs (loop0): 1 truncate cleaned up
[ 112.234735][ T5094] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5094] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5094] creat("./file1", 000) = 4
[pid 5094] exit_group(0) = ?
[pid 5094] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5094, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./12", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./12/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./12/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./12/binderfs") = 0
umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./12/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./12/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./12/file1") = 0
[ 112.369136][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./12") = 0
mkdir("./13", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5096 attached
, child_tidptr=0x555555807650) = 5096
[pid 5096] set_robust_list(0x555555807660, 24) = 0
[pid 5096] chdir("./13") = 0
[pid 5096] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5096] setpgid(0, 0) = 0
[pid 5096] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5096] write(3, "1000", 4) = 4
[pid 5096] close(3) = 0
[pid 5096] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5096] memfd_create("syzkaller", 0) = 3
[pid 5096] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5096] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5096] munmap(0x7f78bec91000, 138412032) = 0
[pid 5096] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5096] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5096] close(3) = 0
[pid 5096] mkdir("./file1", 0777) = 0
[ 112.567224][ T5096] loop0: detected capacity change from 0 to 512
[ 112.583018][ T5096] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 112.601486][ T5096] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5096] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5096] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5096] chdir("./file1") = 0
[pid 5096] ioctl(4, LOOP_CLR_FD) = 0
[pid 5096] close(4) = 0
[pid 5096] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5096] creat("./file1", 000) = 4
[pid 5096] exit_group(0) = ?
[ 112.607240][ T5096] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5096] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5096, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./13", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./13", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./13/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./13/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./13/binderfs") = 0
umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./13/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./13/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
[ 112.747697][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./13/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./13") = 0
mkdir("./14", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5098 attached
, child_tidptr=0x555555807650) = 5098
[pid 5098] set_robust_list(0x555555807660, 24) = 0
[pid 5098] chdir("./14") = 0
[pid 5098] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5098] setpgid(0, 0) = 0
[pid 5098] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5098] write(3, "1000", 4) = 4
[pid 5098] close(3) = 0
[pid 5098] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5098] memfd_create("syzkaller", 0) = 3
[pid 5098] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5098] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5098] munmap(0x7f78bec91000, 138412032) = 0
[pid 5098] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5098] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5098] close(3) = 0
[pid 5098] mkdir("./file1", 0777) = 0
[ 112.990598][ T5098] loop0: detected capacity change from 0 to 512
[ 113.007487][ T5098] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 113.024678][ T5098] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5098] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5098] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5098] chdir("./file1") = 0
[pid 5098] ioctl(4, LOOP_CLR_FD) = 0
[pid 5098] close(4) = 0
[ 113.030403][ T5098] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5098] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5098] creat("./file1", 000) = 4
[pid 5098] exit_group(0) = ?
[pid 5098] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5098, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./14", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./14", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./14/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./14/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./14/binderfs") = 0
umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./14/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
[ 113.197278][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./14/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./14/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./14") = 0
mkdir("./15", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5100 attached
, child_tidptr=0x555555807650) = 5100
[pid 5100] set_robust_list(0x555555807660, 24) = 0
[pid 5100] chdir("./15") = 0
[pid 5100] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5100] setpgid(0, 0) = 0
[pid 5100] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5100] write(3, "1000", 4) = 4
[pid 5100] close(3) = 0
[pid 5100] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5100] memfd_create("syzkaller", 0) = 3
[pid 5100] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5100] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5100] munmap(0x7f78bec91000, 138412032) = 0
[pid 5100] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5100] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5100] close(3) = 0
[pid 5100] mkdir("./file1", 0777) = 0
[ 113.462490][ T5100] loop0: detected capacity change from 0 to 512
[ 113.479482][ T5100] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 113.497650][ T5100] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5100] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5100] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5100] chdir("./file1") = 0
[pid 5100] ioctl(4, LOOP_CLR_FD) = 0
[pid 5100] close(4) = 0
[ 113.503334][ T5100] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5100] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5100] creat("./file1", 000) = 4
[pid 5100] exit_group(0) = ?
[pid 5100] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5100, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./15", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./15", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./15/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./15/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./15/binderfs") = 0
umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./15/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./15/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[ 113.624822][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./15/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./15") = 0
mkdir("./16", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5102 attached
, child_tidptr=0x555555807650) = 5102
[pid 5102] set_robust_list(0x555555807660, 24) = 0
[pid 5102] chdir("./16") = 0
[pid 5102] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5102] setpgid(0, 0) = 0
[pid 5102] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5102] write(3, "1000", 4) = 4
[pid 5102] close(3) = 0
[pid 5102] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5102] memfd_create("syzkaller", 0) = 3
[pid 5102] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5102] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5102] munmap(0x7f78bec91000, 138412032) = 0
[pid 5102] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5102] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5102] close(3) = 0
[pid 5102] mkdir("./file1", 0777) = 0
[ 113.835352][ T5102] loop0: detected capacity change from 0 to 512
[ 113.852236][ T5102] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 113.870118][ T5102] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5102] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5102] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5102] chdir("./file1") = 0
[pid 5102] ioctl(4, LOOP_CLR_FD) = 0
[pid 5102] close(4) = 0
[pid 5102] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 113.875857][ T5102] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5102] creat("./file1", 000) = 4
[pid 5102] exit_group(0) = ?
[pid 5102] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5102, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./16", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./16/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./16/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./16/binderfs") = 0
umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./16/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./16/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[ 114.027186][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./16/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./16") = 0
mkdir("./17", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5104 attached
, child_tidptr=0x555555807650) = 5104
[pid 5104] set_robust_list(0x555555807660, 24) = 0
[pid 5104] chdir("./17") = 0
[pid 5104] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5104] setpgid(0, 0) = 0
[pid 5104] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5104] write(3, "1000", 4) = 4
[pid 5104] close(3) = 0
[pid 5104] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5104] memfd_create("syzkaller", 0) = 3
[pid 5104] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5104] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5104] munmap(0x7f78bec91000, 138412032) = 0
[pid 5104] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5104] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5104] close(3) = 0
[pid 5104] mkdir("./file1", 0777) = 0
[ 114.246652][ T5104] loop0: detected capacity change from 0 to 512
[ 114.271915][ T5104] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 114.289690][ T5104] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5104] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5104] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5104] chdir("./file1") = 0
[pid 5104] ioctl(4, LOOP_CLR_FD) = 0
[pid 5104] close(4) = 0
[pid 5104] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 114.295388][ T5104] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5104] creat("./file1", 000) = 4
[pid 5104] exit_group(0) = ?
[pid 5104] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5104, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./17", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./17", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./17/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./17/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./17/binderfs") = 0
umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./17/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./17/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
[ 114.438875][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
close(4) = 0
rmdir("./17/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./17") = 0
mkdir("./18", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5106 attached
, child_tidptr=0x555555807650) = 5106
[pid 5106] set_robust_list(0x555555807660, 24) = 0
[pid 5106] chdir("./18") = 0
[pid 5106] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5106] setpgid(0, 0) = 0
[pid 5106] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5106] write(3, "1000", 4) = 4
[pid 5106] close(3) = 0
[pid 5106] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5106] memfd_create("syzkaller", 0) = 3
[pid 5106] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5106] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5106] munmap(0x7f78bec91000, 138412032) = 0
[pid 5106] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5106] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5106] close(3) = 0
[pid 5106] mkdir("./file1", 0777) = 0
[ 114.652217][ T5106] loop0: detected capacity change from 0 to 512
[ 114.682461][ T5106] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5106] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5106] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5106] chdir("./file1") = 0
[pid 5106] ioctl(4, LOOP_CLR_FD) = 0
[pid 5106] close(4) = 0
[ 114.712121][ T5106] EXT4-fs (loop0): 1 truncate cleaned up
[ 114.718256][ T5106] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5106] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5106] creat("./file1", 000) = 4
[pid 5106] exit_group(0) = ?
[pid 5106] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5106, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./18", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./18", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./18/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./18/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./18/binderfs") = 0
umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./18/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
[ 114.862886][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./18/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./18/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./18") = 0
mkdir("./19", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5108 attached
, child_tidptr=0x555555807650) = 5108
[pid 5108] set_robust_list(0x555555807660, 24) = 0
[pid 5108] chdir("./19") = 0
[pid 5108] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5108] setpgid(0, 0) = 0
[pid 5108] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5108] write(3, "1000", 4) = 4
[pid 5108] close(3) = 0
[pid 5108] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5108] memfd_create("syzkaller", 0) = 3
[pid 5108] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5108] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5108] munmap(0x7f78bec91000, 138412032) = 0
[pid 5108] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5108] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5108] close(3) = 0
[pid 5108] mkdir("./file1", 0777) = 0
[ 115.128334][ T5108] loop0: detected capacity change from 0 to 512
[ 115.152805][ T5108] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 115.170610][ T5108] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5108] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5108] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5108] chdir("./file1") = 0
[pid 5108] ioctl(4, LOOP_CLR_FD) = 0
[pid 5108] close(4) = 0
[pid 5108] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 115.176448][ T5108] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5108] creat("./file1", 000) = 4
[pid 5108] exit_group(0) = ?
[pid 5108] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5108, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./19", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./19/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./19/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./19/binderfs") = 0
umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./19/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./19/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./19/file1") = 0
[ 115.294611][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./19") = 0
mkdir("./20", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5111 attached
<unfinished ...>
[pid 5111] set_robust_list(0x555555807660, 24 <unfinished ...>
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5111
[pid 5111] <... set_robust_list resumed>) = 0
[pid 5111] chdir("./20") = 0
[pid 5111] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5111] setpgid(0, 0) = 0
[pid 5111] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5111] write(3, "1000", 4) = 4
[pid 5111] close(3) = 0
[pid 5111] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5111] memfd_create("syzkaller", 0) = 3
[pid 5111] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5111] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5111] munmap(0x7f78bec91000, 138412032) = 0
[pid 5111] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5111] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5111] close(3) = 0
[pid 5111] mkdir("./file1", 0777) = 0
[pid 5111] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5111] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5111] chdir("./file1") = 0
[pid 5111] ioctl(4, LOOP_CLR_FD) = 0
[pid 5111] close(4) = 0
[ 115.516570][ T5111] loop0: detected capacity change from 0 to 512
[ 115.531032][ T5111] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 115.548525][ T5111] EXT4-fs (loop0): 1 truncate cleaned up
[ 115.554244][ T5111] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5111] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5111] creat("./file1", 000) = 4
[pid 5111] exit_group(0) = ?
[pid 5111] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5111, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./20", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./20", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./20/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./20/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./20/binderfs") = 0
umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./20/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./20/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
[ 115.696469][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./20/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./20") = 0
mkdir("./21", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5113 attached
, child_tidptr=0x555555807650) = 5113
[pid 5113] set_robust_list(0x555555807660, 24) = 0
[pid 5113] chdir("./21") = 0
[pid 5113] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5113] setpgid(0, 0) = 0
[pid 5113] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5113] write(3, "1000", 4) = 4
[pid 5113] close(3) = 0
[pid 5113] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5113] memfd_create("syzkaller", 0) = 3
[pid 5113] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5113] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5113] munmap(0x7f78bec91000, 138412032) = 0
[pid 5113] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5113] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5113] close(3) = 0
[pid 5113] mkdir("./file1", 0777) = 0
[ 115.894146][ T5113] loop0: detected capacity change from 0 to 512
[ 115.919251][ T5113] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 115.937387][ T5113] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5113] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5113] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5113] chdir("./file1") = 0
[pid 5113] ioctl(4, LOOP_CLR_FD) = 0
[pid 5113] close(4) = 0
[pid 5113] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 115.943422][ T5113] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5113] creat("./file1", 000) = 4
[pid 5113] exit_group(0) = ?
[pid 5113] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5113, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./21", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./21", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./21/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./21/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./21/binderfs") = 0
umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[ 116.057026][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(AT_FDCWD, "./21/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./21/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./21/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./21") = 0
mkdir("./22", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5115 attached
, child_tidptr=0x555555807650) = 5115
[pid 5115] set_robust_list(0x555555807660, 24) = 0
[pid 5115] chdir("./22") = 0
[pid 5115] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5115] setpgid(0, 0) = 0
[pid 5115] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5115] write(3, "1000", 4) = 4
[pid 5115] close(3) = 0
[pid 5115] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5115] memfd_create("syzkaller", 0) = 3
[pid 5115] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5115] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5115] munmap(0x7f78bec91000, 138412032) = 0
[pid 5115] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5115] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5115] close(3) = 0
[pid 5115] mkdir("./file1", 0777) = 0
[ 116.319625][ T5115] loop0: detected capacity change from 0 to 512
[ 116.337978][ T5115] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 116.356363][ T5115] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5115] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5115] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5115] chdir("./file1") = 0
[pid 5115] ioctl(4, LOOP_CLR_FD) = 0
[pid 5115] close(4) = 0
[ 116.362649][ T5115] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5115] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5115] creat("./file1", 000) = 4
[pid 5115] exit_group(0) = ?
[pid 5115] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5115, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./22", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./22/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./22/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./22/binderfs") = 0
umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./22/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./22/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[ 116.502759][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./22/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./22") = 0
mkdir("./23", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5117 attached
, child_tidptr=0x555555807650) = 5117
[pid 5117] set_robust_list(0x555555807660, 24) = 0
[pid 5117] chdir("./23") = 0
[pid 5117] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5117] setpgid(0, 0) = 0
[pid 5117] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5117] write(3, "1000", 4) = 4
[pid 5117] close(3) = 0
[pid 5117] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5117] memfd_create("syzkaller", 0) = 3
[pid 5117] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5117] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5117] munmap(0x7f78bec91000, 138412032) = 0
[pid 5117] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5117] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5117] close(3) = 0
[pid 5117] mkdir("./file1", 0777) = 0
[ 116.691920][ T5117] loop0: detected capacity change from 0 to 512
[ 116.714978][ T5117] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 116.733161][ T5117] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5117] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5117] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5117] chdir("./file1") = 0
[pid 5117] ioctl(4, LOOP_CLR_FD) = 0
[pid 5117] close(4) = 0
[pid 5117] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 116.738882][ T5117] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5117] creat("./file1", 000) = 4
[pid 5117] exit_group(0) = ?
[pid 5117] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5117, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./23", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./23", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./23/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./23/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./23/binderfs") = 0
umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./23/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[ 116.831753][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
openat(AT_FDCWD, "./23/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./23/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./23") = 0
mkdir("./24", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5120 attached
, child_tidptr=0x555555807650) = 5120
[pid 5120] set_robust_list(0x555555807660, 24) = 0
[pid 5120] chdir("./24") = 0
[pid 5120] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5120] setpgid(0, 0) = 0
[pid 5120] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5120] write(3, "1000", 4) = 4
[pid 5120] close(3) = 0
[pid 5120] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5120] memfd_create("syzkaller", 0) = 3
[pid 5120] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5120] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5120] munmap(0x7f78bec91000, 138412032) = 0
[pid 5120] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5120] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5120] close(3) = 0
[pid 5120] mkdir("./file1", 0777) = 0
[ 117.050986][ T5120] loop0: detected capacity change from 0 to 512
[ 117.067161][ T5120] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 117.084783][ T5120] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5120] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5120] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5120] chdir("./file1") = 0
[pid 5120] ioctl(4, LOOP_CLR_FD) = 0
[pid 5120] close(4) = 0
[ 117.090570][ T5120] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5120] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5120] creat("./file1", 000) = 4
[pid 5120] exit_group(0) = ?
[pid 5120] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5120, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./24", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./24", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./24/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./24/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./24/binderfs") = 0
umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./24/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./24/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./24/file1") = 0
[ 117.268912][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./24") = 0
mkdir("./25", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5122 attached
, child_tidptr=0x555555807650) = 5122
[pid 5122] set_robust_list(0x555555807660, 24) = 0
[pid 5122] chdir("./25") = 0
[pid 5122] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5122] setpgid(0, 0) = 0
[pid 5122] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5122] write(3, "1000", 4) = 4
[pid 5122] close(3) = 0
[pid 5122] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5122] memfd_create("syzkaller", 0) = 3
[pid 5122] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5122] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5122] munmap(0x7f78bec91000, 138412032) = 0
[pid 5122] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5122] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5122] close(3) = 0
[pid 5122] mkdir("./file1", 0777) = 0
[ 117.441585][ T5122] loop0: detected capacity change from 0 to 512
[ 117.458894][ T5122] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 117.477423][ T5122] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5122] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5122] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5122] chdir("./file1") = 0
[pid 5122] ioctl(4, LOOP_CLR_FD) = 0
[pid 5122] close(4) = 0
[ 117.483128][ T5122] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5122] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5122] creat("./file1", 000) = 4
[pid 5122] exit_group(0) = ?
[pid 5122] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5122, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./25", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./25", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./25/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./25/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./25/binderfs") = 0
umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[ 117.620391][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(AT_FDCWD, "./25/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./25/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./25/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./25") = 0
mkdir("./26", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5124 attached
, child_tidptr=0x555555807650) = 5124
[pid 5124] set_robust_list(0x555555807660, 24) = 0
[pid 5124] chdir("./26") = 0
[pid 5124] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5124] setpgid(0, 0) = 0
[pid 5124] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5124] write(3, "1000", 4) = 4
[pid 5124] close(3) = 0
[pid 5124] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5124] memfd_create("syzkaller", 0) = 3
[pid 5124] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5124] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5124] munmap(0x7f78bec91000, 138412032) = 0
[pid 5124] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5124] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5124] close(3) = 0
[pid 5124] mkdir("./file1", 0777) = 0
[ 117.856625][ T5124] loop0: detected capacity change from 0 to 512
[ 117.872859][ T5124] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 117.890154][ T5124] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5124] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5124] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5124] chdir("./file1") = 0
[pid 5124] ioctl(4, LOOP_CLR_FD) = 0
[pid 5124] close(4) = 0
[ 117.895938][ T5124] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5124] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5124] creat("./file1", 000) = 4
[pid 5124] exit_group(0) = ?
[pid 5124] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5124, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./26", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./26", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./26/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./26/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./26/binderfs") = 0
umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./26/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
[ 118.009293][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./26/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./26/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./26") = 0
mkdir("./27", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5126 attached
<unfinished ...>
[pid 5126] set_robust_list(0x555555807660, 24 <unfinished ...>
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5126
[pid 5126] <... set_robust_list resumed>) = 0
[pid 5126] chdir("./27") = 0
[pid 5126] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5126] setpgid(0, 0) = 0
[pid 5126] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5126] write(3, "1000", 4) = 4
[pid 5126] close(3) = 0
[pid 5126] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5126] memfd_create("syzkaller", 0) = 3
[pid 5126] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5126] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5126] munmap(0x7f78bec91000, 138412032) = 0
[pid 5126] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5126] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5126] close(3) = 0
[pid 5126] mkdir("./file1", 0777) = 0
[ 118.233265][ T5126] loop0: detected capacity change from 0 to 512
[ 118.259624][ T5126] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 118.277792][ T5126] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5126] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5126] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5126] chdir("./file1") = 0
[pid 5126] ioctl(4, LOOP_CLR_FD) = 0
[pid 5126] close(4) = 0
[ 118.283525][ T5126] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5126] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5126] creat("./file1", 000) = 4
[pid 5126] exit_group(0) = ?
[pid 5126] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5126, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./27", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./27", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./27/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./27/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./27/binderfs") = 0
umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./27/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
[ 118.417475][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./27/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./27/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./27") = 0
mkdir("./28", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5128 attached
, child_tidptr=0x555555807650) = 5128
[pid 5128] set_robust_list(0x555555807660, 24) = 0
[pid 5128] chdir("./28") = 0
[pid 5128] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5128] setpgid(0, 0) = 0
[pid 5128] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5128] write(3, "1000", 4) = 4
[pid 5128] close(3) = 0
[pid 5128] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5128] memfd_create("syzkaller", 0) = 3
[pid 5128] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5128] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5128] munmap(0x7f78bec91000, 138412032) = 0
[pid 5128] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5128] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5128] close(3) = 0
[pid 5128] mkdir("./file1", 0777) = 0
[ 118.741376][ T5128] loop0: detected capacity change from 0 to 512
[ 118.767572][ T5128] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 118.785414][ T5128] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5128] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5128] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5128] chdir("./file1") = 0
[pid 5128] ioctl(4, LOOP_CLR_FD) = 0
[pid 5128] close(4) = 0
[pid 5128] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 118.791684][ T5128] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5128] creat("./file1", 000) = 4
[pid 5128] exit_group(0) = ?
[pid 5128] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5128, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 s */} ---
umount2("./28", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./28", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./28/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./28/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./28/binderfs") = 0
umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./28/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./28/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
[ 118.890437][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
rmdir("./28/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./28") = 0
mkdir("./29", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5130 attached
, child_tidptr=0x555555807650) = 5130
[pid 5130] set_robust_list(0x555555807660, 24) = 0
[pid 5130] chdir("./29") = 0
[pid 5130] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5130] setpgid(0, 0) = 0
[pid 5130] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5130] write(3, "1000", 4) = 4
[pid 5130] close(3) = 0
[pid 5130] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5130] memfd_create("syzkaller", 0) = 3
[pid 5130] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5130] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5130] munmap(0x7f78bec91000, 138412032) = 0
[pid 5130] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5130] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5130] close(3) = 0
[pid 5130] mkdir("./file1", 0777) = 0
[ 119.092247][ T5130] loop0: detected capacity change from 0 to 512
[ 119.110149][ T5130] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 119.127790][ T5130] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5130] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5130] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5130] chdir("./file1") = 0
[pid 5130] ioctl(4, LOOP_CLR_FD) = 0
[pid 5130] close(4) = 0
[ 119.133487][ T5130] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5130] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5130] creat("./file1", 000) = 4
[pid 5130] exit_group(0) = ?
[pid 5130] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5130, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./29", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./29", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./29/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./29/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./29/binderfs") = 0
umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./29/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./29/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
[ 119.293863][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./29/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./29") = 0
mkdir("./30", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5132 attached
, child_tidptr=0x555555807650) = 5132
[pid 5132] set_robust_list(0x555555807660, 24) = 0
[pid 5132] chdir("./30") = 0
[pid 5132] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5132] setpgid(0, 0) = 0
[pid 5132] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5132] write(3, "1000", 4) = 4
[pid 5132] close(3) = 0
[pid 5132] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5132] memfd_create("syzkaller", 0) = 3
[pid 5132] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5132] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5132] munmap(0x7f78bec91000, 138412032) = 0
[pid 5132] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5132] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5132] close(3) = 0
[pid 5132] mkdir("./file1", 0777) = 0
[ 119.527572][ T5132] loop0: detected capacity change from 0 to 512
[ 119.546045][ T5132] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 119.563413][ T5132] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5132] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5132] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5132] chdir("./file1") = 0
[pid 5132] ioctl(4, LOOP_CLR_FD) = 0
[pid 5132] close(4) = 0
[ 119.569652][ T5132] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5132] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5132] creat("./file1", 000) = 4
[pid 5132] exit_group(0) = ?
[pid 5132] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5132, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./30", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./30/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./30/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./30/binderfs") = 0
umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./30/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./30/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
[ 119.775034][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./30/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./30") = 0
mkdir("./31", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5134 attached
, child_tidptr=0x555555807650) = 5134
[pid 5134] set_robust_list(0x555555807660, 24) = 0
[pid 5134] chdir("./31") = 0
[pid 5134] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5134] setpgid(0, 0) = 0
[pid 5134] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5134] write(3, "1000", 4) = 4
[pid 5134] close(3) = 0
[pid 5134] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5134] memfd_create("syzkaller", 0) = 3
[pid 5134] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5134] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5134] munmap(0x7f78bec91000, 138412032) = 0
[pid 5134] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5134] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5134] close(3) = 0
[pid 5134] mkdir("./file1", 0777) = 0
[ 120.060246][ T5134] loop0: detected capacity change from 0 to 512
[ 120.077238][ T5134] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 120.094681][ T5134] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5134] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5134] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5134] chdir("./file1") = 0
[pid 5134] ioctl(4, LOOP_CLR_FD) = 0
[pid 5134] close(4) = 0
[pid 5134] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 120.100466][ T5134] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5134] creat("./file1", 000) = 4
[pid 5134] exit_group(0) = ?
[pid 5134] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5134, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./31", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./31/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./31/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./31/binderfs") = 0
umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./31/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./31/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
[ 120.222776][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
close(4) = 0
rmdir("./31/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./31") = 0
mkdir("./32", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5136 attached
, child_tidptr=0x555555807650) = 5136
[pid 5136] set_robust_list(0x555555807660, 24) = 0
[pid 5136] chdir("./32") = 0
[pid 5136] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5136] setpgid(0, 0) = 0
[pid 5136] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5136] write(3, "1000", 4) = 4
[pid 5136] close(3) = 0
[pid 5136] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5136] memfd_create("syzkaller", 0) = 3
[pid 5136] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5136] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5136] munmap(0x7f78bec91000, 138412032) = 0
[pid 5136] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5136] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5136] close(3) = 0
[pid 5136] mkdir("./file1", 0777) = 0
[pid 5136] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5136] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5136] chdir("./file1") = 0
[pid 5136] ioctl(4, LOOP_CLR_FD) = 0
[pid 5136] close(4) = 0
[pid 5136] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 120.394683][ T5136] loop0: detected capacity change from 0 to 512
[ 120.411667][ T5136] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 120.429783][ T5136] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5136] creat("./file1", 000) = 4
[pid 5136] exit_group(0) = ?
[pid 5136] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5136, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./32", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./32/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./32/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./32/binderfs") = 0
umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./32/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./32/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./32/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./32") = 0
mkdir("./33", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5138 attached
, child_tidptr=0x555555807650) = 5138
[pid 5138] set_robust_list(0x555555807660, 24) = 0
[pid 5138] chdir("./33") = 0
[pid 5138] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5138] setpgid(0, 0) = 0
[pid 5138] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5138] write(3, "1000", 4) = 4
[pid 5138] close(3) = 0
[pid 5138] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5138] memfd_create("syzkaller", 0) = 3
[pid 5138] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5138] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5138] munmap(0x7f78bec91000, 138412032) = 0
[pid 5138] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5138] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5138] close(3) = 0
[pid 5138] mkdir("./file1", 0777) = 0
[pid 5138] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5138] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5138] chdir("./file1") = 0
[pid 5138] ioctl(4, LOOP_CLR_FD) = 0
[ 120.726776][ T5138] loop0: detected capacity change from 0 to 512
[ 120.743731][ T5138] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 120.762022][ T5138] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5138] close(4) = 0
[pid 5138] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5138] creat("./file1", 000) = 4
[pid 5138] exit_group(0) = ?
[pid 5138] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5138, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./33", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./33", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./33/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./33/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./33/binderfs") = 0
umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./33/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./33/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./33/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./33") = 0
mkdir("./34", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5141 attached
, child_tidptr=0x555555807650) = 5141
[pid 5141] set_robust_list(0x555555807660, 24) = 0
[pid 5141] chdir("./34") = 0
[pid 5141] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5141] setpgid(0, 0) = 0
[pid 5141] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5141] write(3, "1000", 4) = 4
[pid 5141] close(3) = 0
[pid 5141] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5141] memfd_create("syzkaller", 0) = 3
[pid 5141] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5141] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5141] munmap(0x7f78bec91000, 138412032) = 0
[pid 5141] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5141] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5141] close(3) = 0
[pid 5141] mkdir("./file1", 0777) = 0
[pid 5141] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5141] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5141] chdir("./file1") = 0
[pid 5141] ioctl(4, LOOP_CLR_FD) = 0
[pid 5141] close(4) = 0
[pid 5141] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 121.137162][ T5141] loop0: detected capacity change from 0 to 512
[ 121.148115][ T5141] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 121.166635][ T5141] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5141] creat("./file1", 000) = 4
[pid 5141] exit_group(0) = ?
[pid 5141] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5141, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./34", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./34", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./34/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./34/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./34/binderfs") = 0
umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./34/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./34/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./34/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./34") = 0
mkdir("./35", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5143 attached
, child_tidptr=0x555555807650) = 5143
[pid 5143] set_robust_list(0x555555807660, 24) = 0
[pid 5143] chdir("./35") = 0
[pid 5143] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5143] setpgid(0, 0) = 0
[pid 5143] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5143] write(3, "1000", 4) = 4
[pid 5143] close(3) = 0
[pid 5143] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5143] memfd_create("syzkaller", 0) = 3
[pid 5143] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5143] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5143] munmap(0x7f78bec91000, 138412032) = 0
[pid 5143] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5143] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5143] close(3) = 0
[pid 5143] mkdir("./file1", 0777) = 0
[pid 5143] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5143] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5143] chdir("./file1") = 0
[pid 5143] ioctl(4, LOOP_CLR_FD) = 0
[pid 5143] close(4) = 0
[pid 5143] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5143] creat("./file1", 000) = 4
[pid 5143] exit_group(0) = ?
[ 121.470898][ T5143] loop0: detected capacity change from 0 to 512
[ 121.487967][ T5143] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 121.505573][ T5143] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5143] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5143, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./35", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./35", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./35/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./35/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./35/binderfs") = 0
umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./35/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./35/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./35/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./35") = 0
mkdir("./36", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5145 attached
, child_tidptr=0x555555807650) = 5145
[pid 5145] set_robust_list(0x555555807660, 24) = 0
[pid 5145] chdir("./36") = 0
[pid 5145] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5145] setpgid(0, 0) = 0
[pid 5145] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5145] write(3, "1000", 4) = 4
[pid 5145] close(3) = 0
[pid 5145] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5145] memfd_create("syzkaller", 0) = 3
[pid 5145] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5145] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5145] munmap(0x7f78bec91000, 138412032) = 0
[pid 5145] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5145] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5145] close(3) = 0
[pid 5145] mkdir("./file1", 0777) = 0
[pid 5145] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5145] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5145] chdir("./file1") = 0
[pid 5145] ioctl(4, LOOP_CLR_FD) = 0
[pid 5145] close(4) = 0
[ 121.839755][ T5145] loop0: detected capacity change from 0 to 512
[ 121.857931][ T5145] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 121.875386][ T5145] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5145] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5145] creat("./file1", 000) = 4
[pid 5145] exit_group(0) = ?
[pid 5145] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5145, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./36", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./36", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./36/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./36/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./36/binderfs") = 0
umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./36/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./36/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./36/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./36") = 0
mkdir("./37", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5147 attached
, child_tidptr=0x555555807650) = 5147
[pid 5147] set_robust_list(0x555555807660, 24) = 0
[pid 5147] chdir("./37") = 0
[pid 5147] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5147] setpgid(0, 0) = 0
[pid 5147] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5147] write(3, "1000", 4) = 4
[pid 5147] close(3) = 0
[pid 5147] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5147] memfd_create("syzkaller", 0) = 3
[pid 5147] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5147] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5147] munmap(0x7f78bec91000, 138412032) = 0
[pid 5147] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5147] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5147] close(3) = 0
[pid 5147] mkdir("./file1", 0777) = 0
[pid 5147] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5147] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5147] chdir("./file1") = 0
[pid 5147] ioctl(4, LOOP_CLR_FD) = 0
[pid 5147] close(4) = 0
[ 122.245694][ T5147] loop0: detected capacity change from 0 to 512
[ 122.263826][ T5147] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 122.281935][ T5147] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5147] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5147] creat("./file1", 000) = 4
[pid 5147] exit_group(0) = ?
[pid 5147] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5147, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./37", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./37", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./37/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./37/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./37/binderfs") = 0
umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./37/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./37/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./37/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./37") = 0
mkdir("./38", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5149 attached
, child_tidptr=0x555555807650) = 5149
[pid 5149] set_robust_list(0x555555807660, 24) = 0
[pid 5149] chdir("./38") = 0
[pid 5149] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5149] setpgid(0, 0) = 0
[pid 5149] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5149] write(3, "1000", 4) = 4
[pid 5149] close(3) = 0
[pid 5149] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5149] memfd_create("syzkaller", 0) = 3
[pid 5149] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5149] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5149] munmap(0x7f78bec91000, 138412032) = 0
[pid 5149] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5149] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5149] close(3) = 0
[pid 5149] mkdir("./file1", 0777) = 0
[pid 5149] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5149] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5149] chdir("./file1") = 0
[ 122.633803][ T5149] loop0: detected capacity change from 0 to 512
[ 122.659318][ T5149] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 122.677600][ T5149] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5149] ioctl(4, LOOP_CLR_FD) = 0
[pid 5149] close(4) = 0
[pid 5149] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5149] creat("./file1", 000) = 4
[pid 5149] exit_group(0) = ?
[pid 5149] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5149, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./38", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./38", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./38/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./38/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./38/binderfs") = 0
umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./38/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./38/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./38/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./38") = 0
mkdir("./39", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5151 attached
, child_tidptr=0x555555807650) = 5151
[pid 5151] set_robust_list(0x555555807660, 24) = 0
[pid 5151] chdir("./39") = 0
[pid 5151] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5151] setpgid(0, 0) = 0
[pid 5151] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5151] write(3, "1000", 4) = 4
[pid 5151] close(3) = 0
[pid 5151] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5151] memfd_create("syzkaller", 0) = 3
[pid 5151] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5151] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5151] munmap(0x7f78bec91000, 138412032) = 0
[pid 5151] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5151] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5151] close(3) = 0
[pid 5151] mkdir("./file1", 0777) = 0
[pid 5151] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5151] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5151] chdir("./file1") = 0
[pid 5151] ioctl(4, LOOP_CLR_FD) = 0
[pid 5151] close(4) = 0
[ 123.073251][ T5151] loop0: detected capacity change from 0 to 512
[ 123.091176][ T5151] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 123.109481][ T5151] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5151] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5151] creat("./file1", 000) = 4
[pid 5151] exit_group(0) = ?
[pid 5151] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5151, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./39", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./39", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./39/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./39/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./39/binderfs") = 0
umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./39/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./39/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./39/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./39") = 0
mkdir("./40", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5153 attached
, child_tidptr=0x555555807650) = 5153
[pid 5153] set_robust_list(0x555555807660, 24) = 0
[pid 5153] chdir("./40") = 0
[pid 5153] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5153] setpgid(0, 0) = 0
[pid 5153] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5153] write(3, "1000", 4) = 4
[pid 5153] close(3) = 0
[pid 5153] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5153] memfd_create("syzkaller", 0) = 3
[pid 5153] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5153] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5153] munmap(0x7f78bec91000, 138412032) = 0
[pid 5153] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5153] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5153] close(3) = 0
[pid 5153] mkdir("./file1", 0777) = 0
[ 123.523780][ T5153] loop0: detected capacity change from 0 to 512
[pid 5153] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5153] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5153] chdir("./file1") = 0
[pid 5153] ioctl(4, LOOP_CLR_FD) = 0
[pid 5153] close(4) = 0
[ 123.573444][ T5153] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 123.591850][ T5153] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5153] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5153] creat("./file1", 000) = 4
[pid 5153] exit_group(0) = ?
[pid 5153] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5153, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./40", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./40", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./40/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./40/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./40/binderfs") = 0
umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./40/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./40/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./40/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./40") = 0
mkdir("./41", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5155 attached
, child_tidptr=0x555555807650) = 5155
[pid 5155] set_robust_list(0x555555807660, 24) = 0
[pid 5155] chdir("./41") = 0
[pid 5155] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5155] setpgid(0, 0) = 0
[pid 5155] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5155] write(3, "1000", 4) = 4
[pid 5155] close(3) = 0
[pid 5155] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5155] memfd_create("syzkaller", 0) = 3
[pid 5155] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5155] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5155] munmap(0x7f78bec91000, 138412032) = 0
[pid 5155] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5155] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5155] close(3) = 0
[pid 5155] mkdir("./file1", 0777) = 0
[pid 5155] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5155] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[ 123.901352][ T5155] loop0: detected capacity change from 0 to 512
[ 123.926773][ T5155] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 123.944817][ T5155] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5155] chdir("./file1") = 0
[pid 5155] ioctl(4, LOOP_CLR_FD) = 0
[pid 5155] close(4) = 0
[pid 5155] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5155] creat("./file1", 000) = 4
[pid 5155] exit_group(0) = ?
[pid 5155] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5155, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./41", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./41", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./41/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./41/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./41/binderfs") = 0
umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./41/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./41/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./41/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./41") = 0
mkdir("./42", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5157 attached
, child_tidptr=0x555555807650) = 5157
[pid 5157] set_robust_list(0x555555807660, 24) = 0
[pid 5157] chdir("./42") = 0
[pid 5157] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5157] setpgid(0, 0) = 0
[pid 5157] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5157] write(3, "1000", 4) = 4
[pid 5157] close(3) = 0
[pid 5157] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5157] memfd_create("syzkaller", 0) = 3
[pid 5157] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5157] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5157] munmap(0x7f78bec91000, 138412032) = 0
[pid 5157] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5157] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5157] close(3) = 0
[pid 5157] mkdir("./file1", 0777) = 0
[pid 5157] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5157] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5157] chdir("./file1") = 0
[pid 5157] ioctl(4, LOOP_CLR_FD) = 0
[pid 5157] close(4) = 0
[ 124.257867][ T5157] loop0: detected capacity change from 0 to 512
[ 124.282541][ T5157] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 124.301719][ T5157] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5157] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5157] creat("./file1", 000) = 4
[pid 5157] exit_group(0) = ?
[pid 5157] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5157, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./42", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./42", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./42/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./42/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./42/binderfs") = 0
umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./42/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./42/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./42/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./42") = 0
mkdir("./43", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5160 attached
, child_tidptr=0x555555807650) = 5160
[pid 5160] set_robust_list(0x555555807660, 24) = 0
[pid 5160] chdir("./43") = 0
[pid 5160] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5160] setpgid(0, 0) = 0
[pid 5160] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5160] write(3, "1000", 4) = 4
[pid 5160] close(3) = 0
[pid 5160] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5160] memfd_create("syzkaller", 0) = 3
[pid 5160] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5160] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5160] munmap(0x7f78bec91000, 138412032) = 0
[pid 5160] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5160] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5160] close(3) = 0
[pid 5160] mkdir("./file1", 0777) = 0
[pid 5160] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5160] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5160] chdir("./file1") = 0
[pid 5160] ioctl(4, LOOP_CLR_FD) = 0
[pid 5160] close(4) = 0
[ 124.697562][ T5160] loop0: detected capacity change from 0 to 512
[ 124.714828][ T5160] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 124.731773][ T5160] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5160] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5160] creat("./file1", 000) = 4
[pid 5160] exit_group(0) = ?
[pid 5160] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5160, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./43", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./43/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./43/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./43/binderfs") = 0
umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./43/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./43/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./43/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./43") = 0
mkdir("./44", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5162 attached
, child_tidptr=0x555555807650) = 5162
[pid 5162] set_robust_list(0x555555807660, 24) = 0
[pid 5162] chdir("./44") = 0
[pid 5162] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5162] setpgid(0, 0) = 0
[pid 5162] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5162] write(3, "1000", 4) = 4
[pid 5162] close(3) = 0
[pid 5162] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5162] memfd_create("syzkaller", 0) = 3
[pid 5162] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5162] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5162] munmap(0x7f78bec91000, 138412032) = 0
[pid 5162] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5162] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5162] close(3) = 0
[pid 5162] mkdir("./file1", 0777) = 0
[pid 5162] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5162] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5162] chdir("./file1") = 0
[pid 5162] ioctl(4, LOOP_CLR_FD) = 0
[pid 5162] close(4) = 0
[ 125.197117][ T5162] loop0: detected capacity change from 0 to 512
[ 125.212898][ T5162] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 125.230632][ T5162] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5162] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5162] creat("./file1", 000) = 4
[pid 5162] exit_group(0) = ?
[pid 5162] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5162, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./44", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./44", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./44/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./44/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./44/binderfs") = 0
umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./44/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./44/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./44/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./44") = 0
mkdir("./45", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5164 attached
<unfinished ...>
[pid 5164] set_robust_list(0x555555807660, 24) = 0
[pid 5164] chdir("./45") = 0
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5164
[pid 5164] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5164] setpgid(0, 0) = 0
[pid 5164] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5164] write(3, "1000", 4) = 4
[pid 5164] close(3) = 0
[pid 5164] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5164] memfd_create("syzkaller", 0) = 3
[pid 5164] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5164] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5164] munmap(0x7f78bec91000, 138412032) = 0
[pid 5164] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5164] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5164] close(3) = 0
[pid 5164] mkdir("./file1", 0777) = 0
[ 125.591173][ T5164] loop0: detected capacity change from 0 to 512
[ 125.618441][ T5164] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5164] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5164] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5164] chdir("./file1") = 0
[pid 5164] ioctl(4, LOOP_CLR_FD) = 0
[pid 5164] close(4) = 0
[pid 5164] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 125.636692][ T5164] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5164] creat("./file1", 000) = 4
[pid 5164] exit_group(0) = ?
[pid 5164] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5164, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 s */} ---
umount2("./45", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./45", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./45/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./45/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./45/binderfs") = 0
umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./45/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./45/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./45/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./45") = 0
mkdir("./46", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5166 attached
, child_tidptr=0x555555807650) = 5166
[pid 5166] set_robust_list(0x555555807660, 24) = 0
[pid 5166] chdir("./46") = 0
[pid 5166] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5166] setpgid(0, 0) = 0
[pid 5166] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5166] write(3, "1000", 4) = 4
[pid 5166] close(3) = 0
[pid 5166] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5166] memfd_create("syzkaller", 0) = 3
[pid 5166] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5166] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5166] munmap(0x7f78bec91000, 138412032) = 0
[pid 5166] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5166] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5166] close(3) = 0
[pid 5166] mkdir("./file1", 0777) = 0
[pid 5166] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5166] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5166] chdir("./file1") = 0
[pid 5166] ioctl(4, LOOP_CLR_FD) = 0
[pid 5166] close(4) = 0
[ 126.083369][ T5166] loop0: detected capacity change from 0 to 512
[ 126.100058][ T5166] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 126.117782][ T5166] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5166] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5166] creat("./file1", 000) = 4
[pid 5166] exit_group(0) = ?
[pid 5166] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5166, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./46", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./46", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./46/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./46/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./46/binderfs") = 0
umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./46/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./46/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./46/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./46") = 0
mkdir("./47", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5168 attached
<unfinished ...>
[pid 5168] set_robust_list(0x555555807660, 24 <unfinished ...>
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5168
[pid 5168] <... set_robust_list resumed>) = 0
[pid 5168] chdir("./47") = 0
[pid 5168] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5168] setpgid(0, 0) = 0
[pid 5168] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5168] write(3, "1000", 4) = 4
[pid 5168] close(3) = 0
[pid 5168] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5168] memfd_create("syzkaller", 0) = 3
[pid 5168] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5168] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5168] munmap(0x7f78bec91000, 138412032) = 0
[pid 5168] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5168] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5168] close(3) = 0
[pid 5168] mkdir("./file1", 0777) = 0
[pid 5168] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5168] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5168] chdir("./file1") = 0
[pid 5168] ioctl(4, LOOP_CLR_FD) = 0
[pid 5168] close(4) = 0
[ 126.562842][ T5168] loop0: detected capacity change from 0 to 512
[ 126.578761][ T5168] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 126.607300][ T5168] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5168] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5168] creat("./file1", 000) = 4
[pid 5168] exit_group(0) = ?
[pid 5168] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5168, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./47", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./47", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./47/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./47/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./47/binderfs") = 0
umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./47/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./47/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./47/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./47") = 0
mkdir("./48", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5170 attached
, child_tidptr=0x555555807650) = 5170
[pid 5170] set_robust_list(0x555555807660, 24) = 0
[pid 5170] chdir("./48") = 0
[pid 5170] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5170] setpgid(0, 0) = 0
[pid 5170] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5170] write(3, "1000", 4) = 4
[pid 5170] close(3) = 0
[pid 5170] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5170] memfd_create("syzkaller", 0) = 3
[pid 5170] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5170] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5170] munmap(0x7f78bec91000, 138412032) = 0
[pid 5170] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5170] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5170] close(3) = 0
[pid 5170] mkdir("./file1", 0777) = 0
[pid 5170] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5170] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5170] chdir("./file1") = 0
[pid 5170] ioctl(4, LOOP_CLR_FD) = 0
[pid 5170] close(4) = 0
[ 126.887534][ T5170] loop0: detected capacity change from 0 to 512
[ 126.903583][ T5170] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 126.922679][ T5170] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5170] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5170] creat("./file1", 000) = 4
[pid 5170] exit_group(0) = ?
[pid 5170] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5170, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./48", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./48", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./48/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./48/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./48/binderfs") = 0
umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./48/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./48/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./48/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./48") = 0
mkdir("./49", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5172 attached
, child_tidptr=0x555555807650) = 5172
[pid 5172] set_robust_list(0x555555807660, 24) = 0
[pid 5172] chdir("./49") = 0
[pid 5172] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5172] setpgid(0, 0) = 0
[pid 5172] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5172] write(3, "1000", 4) = 4
[pid 5172] close(3) = 0
[pid 5172] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5172] memfd_create("syzkaller", 0) = 3
[pid 5172] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5172] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5172] munmap(0x7f78bec91000, 138412032) = 0
[pid 5172] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5172] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5172] close(3) = 0
[pid 5172] mkdir("./file1", 0777) = 0
[ 127.271764][ T5172] loop0: detected capacity change from 0 to 512
[ 127.300037][ T5172] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5172] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5172] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5172] chdir("./file1") = 0
[pid 5172] ioctl(4, LOOP_CLR_FD) = 0
[pid 5172] close(4) = 0
[pid 5172] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 127.321586][ T5172] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5172] creat("./file1", 000) = 4
[pid 5172] exit_group(0) = ?
[pid 5172] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5172, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./49", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./49", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./49/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./49/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./49/binderfs") = 0
umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./49/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./49/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./49/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./49") = 0
mkdir("./50", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5174 attached
, child_tidptr=0x555555807650) = 5174
[pid 5174] set_robust_list(0x555555807660, 24) = 0
[pid 5174] chdir("./50") = 0
[pid 5174] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5174] setpgid(0, 0) = 0
[pid 5174] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5174] write(3, "1000", 4) = 4
[pid 5174] close(3) = 0
[pid 5174] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5174] memfd_create("syzkaller", 0) = 3
[pid 5174] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5174] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5174] munmap(0x7f78bec91000, 138412032) = 0
[pid 5174] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5174] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5174] close(3) = 0
[pid 5174] mkdir("./file1", 0777) = 0
[ 127.557526][ T5174] loop0: detected capacity change from 0 to 512
[ 127.590452][ T5174] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5174] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5174] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5174] chdir("./file1") = 0
[pid 5174] ioctl(4, LOOP_CLR_FD) = 0
[pid 5174] close(4) = 0
[ 127.608524][ T5174] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5174] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5174] creat("./file1", 000) = 4
[pid 5174] exit_group(0) = ?
[pid 5174] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5174, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./50", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./50", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./50/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./50/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./50/binderfs") = 0
umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./50/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./50/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./50/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./50") = 0
mkdir("./51", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5176 attached
, child_tidptr=0x555555807650) = 5176
[pid 5176] set_robust_list(0x555555807660, 24) = 0
[pid 5176] chdir("./51") = 0
[pid 5176] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5176] setpgid(0, 0) = 0
[pid 5176] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5176] write(3, "1000", 4) = 4
[pid 5176] close(3) = 0
[pid 5176] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5176] memfd_create("syzkaller", 0) = 3
[pid 5176] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5176] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5176] munmap(0x7f78bec91000, 138412032) = 0
[pid 5176] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5176] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5176] close(3) = 0
[pid 5176] mkdir("./file1", 0777) = 0
[pid 5176] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5176] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5176] chdir("./file1") = 0
[pid 5176] ioctl(4, LOOP_CLR_FD) = 0
[pid 5176] close(4) = 0
[ 127.910873][ T5176] loop0: detected capacity change from 0 to 512
[ 127.928095][ T5176] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 127.945602][ T5176] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5176] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5176] creat("./file1", 000) = 4
[pid 5176] exit_group(0) = ?
[pid 5176] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5176, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./51", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./51", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./51/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./51/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./51/binderfs") = 0
umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./51/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./51/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./51/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./51") = 0
mkdir("./52", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5178 attached
, child_tidptr=0x555555807650) = 5178
[pid 5178] set_robust_list(0x555555807660, 24) = 0
[pid 5178] chdir("./52") = 0
[pid 5178] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5178] setpgid(0, 0) = 0
[pid 5178] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5178] write(3, "1000", 4) = 4
[pid 5178] close(3) = 0
[pid 5178] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5178] memfd_create("syzkaller", 0) = 3
[pid 5178] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5178] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5178] munmap(0x7f78bec91000, 138412032) = 0
[pid 5178] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5178] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5178] close(3) = 0
[pid 5178] mkdir("./file1", 0777) = 0
[pid 5178] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5178] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5178] chdir("./file1") = 0
[pid 5178] ioctl(4, LOOP_CLR_FD) = 0
[ 128.264361][ T5178] loop0: detected capacity change from 0 to 512
[ 128.280241][ T5178] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 128.298572][ T5178] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5178] close(4) = 0
[pid 5178] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 128.354387][ T5178]
[ 128.356789][ T5178] ======================================================
[ 128.364363][ T5178] WARNING: possible circular locking dependency detected
[ 128.371415][ T5178] 6.7.0-rc5-syzkaller #0 Not tainted
[ 128.376852][ T5178] ------------------------------------------------------
[ 128.383968][ T5178] syz-executor889/5178 is trying to acquire lock:
[ 128.390390][ T5178] ffff888076232740 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x173/0x430
[ 128.400812][ T5178]
[ 128.400812][ T5178] but task is already holding lock:
[ 128.408191][ T5178] ffff888076233608 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b94/0x29d0
[ 128.417559][ T5178]
[ 128.417559][ T5178] which lock already depends on the new lock.
[ 128.417559][ T5178]
[ 128.427988][ T5178]
[ 128.427988][ T5178] the existing dependency chain (in reverse order) is:
[ 128.437011][ T5178]
[ 128.437011][ T5178] -> #1 (&ei->i_data_sem/3){++++}-{3:3}:
[ 128.444857][ T5178] down_write+0x3a/0x50
[ 128.449580][ T5178] ext4_xattr_set_entry+0x3415/0x3ce0
[ 128.455495][ T5178] ext4_xattr_ibody_set+0x126/0x380
[ 128.461252][ T5178] ext4_xattr_set_handle+0x936/0x1420
[ 128.467175][ T5178] ext4_xattr_set+0x149/0x370
[ 128.472416][ T5178] __vfs_setxattr+0x173/0x1d0
[ 128.477639][ T5178] __vfs_setxattr_noperm+0x127/0x5e0
[ 128.483636][ T5178] __vfs_setxattr_locked+0x17e/0x250
[ 128.489485][ T5178] vfs_setxattr+0x146/0x350
[ 128.494581][ T5178] do_setxattr+0x142/0x170
[ 128.499549][ T5178] setxattr+0x159/0x170
[ 128.504434][ T5178] path_setxattr+0x175/0x1d0
[ 128.509690][ T5178] __x64_sys_setxattr+0xc4/0x160
[ 128.515578][ T5178] do_syscall_64+0x40/0x110
[ 128.521305][ T5178] entry_SYSCALL_64_after_hwframe+0x63/0x6b
[ 128.527854][ T5178]
[ 128.527854][ T5178] -> #0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}:
[ 128.536159][ T5178] __lock_acquire+0x2433/0x3b20
[ 128.541737][ T5178] lock_acquire+0x1ae/0x520
[ 128.546792][ T5178] down_write+0x3a/0x50
[ 128.551514][ T5178] ext4_xattr_inode_iget+0x173/0x430
[ 128.557510][ T5178] ext4_xattr_inode_get+0x170/0x840
[ 128.563288][ T5178] ext4_expand_extra_isize_ea+0x125a/0x1b20
[ 128.570338][ T5178] __ext4_expand_extra_isize+0x342/0x470
[ 128.576534][ T5178] __ext4_mark_inode_dirty+0x52b/0x810
[ 128.582640][ T5178] ext4_setattr+0x1c08/0x29d0
[ 128.587891][ T5178] notify_change+0x742/0x11c0
[ 128.593119][ T5178] do_truncate+0x15c/0x220
[ 128.598284][ T5178] path_openat+0x25a0/0x2c50
[ 128.603441][ T5178] do_filp_open+0x1de/0x430
[ 128.608492][ T5178] do_sys_openat2+0x176/0x1e0
[ 128.613717][ T5178] __x64_sys_creat+0xcd/0x120
[ 128.619144][ T5178] do_syscall_64+0x40/0x110
[ 128.624192][ T5178] entry_SYSCALL_64_after_hwframe+0x63/0x6b
[ 128.630643][ T5178]
[ 128.630643][ T5178] other info that might help us debug this:
[ 128.630643][ T5178]
[ 128.640875][ T5178] Possible unsafe locking scenario:
[ 128.640875][ T5178]
[ 128.648329][ T5178] CPU0 CPU1
[ 128.653705][ T5178] ---- ----
[ 128.659079][ T5178] lock(&ei->i_data_sem/3);
[ 128.663696][ T5178] lock(&ea_inode->i_rwsem#7/1);
[ 128.671271][ T5178] lock(&ei->i_data_sem/3);
[ 128.678418][ T5178] lock(&ea_inode->i_rwsem#7/1);
[ 128.683477][ T5178]
[ 128.683477][ T5178] *** DEADLOCK ***
[ 128.683477][ T5178]
[ 128.691629][ T5178] 5 locks held by syz-executor889/5178:
[ 128.697187][ T5178] #0: ffff888070480418 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x2112/0x2c50
[ 128.706547][ T5178] #1: ffff888076233780 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: do_truncate+0x14b/0x220
[ 128.716867][ T5178] #2: ffff888076233920 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xdf1/0x29d0
[ 128.727097][ T5178] #3: ffff888076233608 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b94/0x29d0
[ 128.736930][ T5178] #4: ffff888076233448 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a1/0x810
[ 128.747335][ T5178]
[ 128.747335][ T5178] stack backtrace:
[ 128.753231][ T5178] CPU: 0 PID: 5178 Comm: syz-executor889 Not tainted 6.7.0-rc5-syzkaller #0
[ 128.761933][ T5178] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
[ 128.772018][ T5178] Call Trace:
[ 128.775308][ T5178] <TASK>
[ 128.778247][ T5178] dump_stack_lvl+0xd9/0x1b0
[ 128.782966][ T5178] check_noncircular+0x317/0x400
[ 128.787978][ T5178] ? print_circular_bug+0x5c0/0x5c0
[ 128.793222][ T5178] ? lockdep_lock+0xc6/0x200
[ 128.797833][ T5178] ? hlock_class+0x130/0x130
[ 128.802478][ T5178] __lock_acquire+0x2433/0x3b20
[ 128.807372][ T5178] ? lockdep_hardirqs_on_prepare+0x420/0x420
[ 128.813394][ T5178] ? look_up_lock_class+0x59/0x130
[ 128.818568][ T5178] lock_acquire+0x1ae/0x520
[ 128.823310][ T5178] ? ext4_xattr_inode_iget+0x173/0x430
[ 128.828808][ T5178] ? lock_sync+0x190/0x190
[ 128.833278][ T5178] ? preempt_count_sub+0x160/0x160
[ 128.838528][ T5178] down_write+0x3a/0x50
[ 128.842740][ T5178] ? ext4_xattr_inode_iget+0x173/0x430
[ 128.848267][ T5178] ext4_xattr_inode_iget+0x173/0x430
[ 128.853592][ T5178] ext4_xattr_inode_get+0x170/0x840
[ 128.860566][ T5178] ? __kmalloc_large_node+0x131/0x1c0
[ 128.866078][ T5178] ? lockdep_hardirqs_on+0x7d/0x110
[ 128.871322][ T5178] ? ext4_xattr_inode_iget+0x430/0x430
[ 128.876803][ T5178] ? rcu_is_watching+0x12/0xb0
[ 128.881592][ T5178] ? trace_kmalloc+0x26/0xa0
[ 128.886196][ T5178] ? __kmalloc_node.cold+0x58/0x5d
[ 128.891417][ T5178] ext4_expand_extra_isize_ea+0x125a/0x1b20
[ 128.897784][ T5178] ? ext4_xattr_set+0x370/0x370
[ 128.902828][ T5178] ? lockdep_unlock+0x11b/0x290
[ 128.907700][ T5178] ? preempt_count_sub+0x160/0x160
[ 128.912833][ T5178] ? down_write_trylock+0x1ae/0x3d0
[ 128.918068][ T5178] ? dquot_initialize_needed+0x17d/0x290
[ 128.923726][ T5178] __ext4_expand_extra_isize+0x342/0x470
[ 128.929381][ T5178] __ext4_mark_inode_dirty+0x52b/0x810
[ 128.934864][ T5178] ? ext4_expand_extra_isize+0x600/0x600
[ 128.940670][ T5178] ? lock_sync+0x190/0x190
[ 128.945111][ T5178] ? preempt_count_sub+0x160/0x160
[ 128.950335][ T5178] ext4_setattr+0x1c08/0x29d0
[ 128.955049][ T5178] ? ext4_journalled_write_end+0x1120/0x1120
[ 128.961085][ T5178] notify_change+0x742/0x11c0
[ 128.965799][ T5178] do_truncate+0x15c/0x220
[ 128.970240][ T5178] ? file_open_root+0x450/0x450
[ 128.975120][ T5178] path_openat+0x25a0/0x2c50
[ 128.979739][ T5178] ? path_lookupat+0x770/0x770
[ 128.984529][ T5178] ? lockdep_hardirqs_on_prepare+0x420/0x420
[ 128.990548][ T5178] do_filp_open+0x1de/0x430
[ 128.995085][ T5178] ? may_open_dev+0xf0/0xf0
[ 128.999619][ T5178] ? find_held_lock+0x2d/0x110
[ 129.004519][ T5178] ? _raw_spin_unlock+0x28/0x40
[ 129.009395][ T5178] ? alloc_fd+0x2da/0x6c0
[ 129.013755][ T5178] do_sys_openat2+0x176/0x1e0
[ 129.018632][ T5178] ? build_open_flags+0x690/0x690
[ 129.023684][ T5178] ? ptrace_notify+0xf4/0x130
[ 129.028469][ T5178] ? restore_fpregs_from_fpstate+0xc1/0x1d0
[ 129.034500][ T5178] __x64_sys_creat+0xcd/0x120
[ 129.039209][ T5178] ? __x64_compat_sys_openat+0x200/0x200
[ 129.044857][ T5178] ? _raw_spin_unlock_irq+0x2e/0x50
[ 129.050069][ T5178] ? syscall_trace_enter.constprop.0+0xaf/0x1e0
[ 129.056363][ T5178] do_syscall_64+0x40/0x110
[ 129.060981][ T5178] entry_SYSCALL_64_after_hwframe+0x63/0x6b
[ 129.066935][ T5178] RIP: 0033:0x7f78c70d01e9
[ 129.071355][ T5178] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[ 129.090999][ T5178] RSP: 002b:00007ffc16f921c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
[ 129.099446][ T5178] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f78c70d01e9
[pid 5178] creat("./file1", 000) = 4
[pid 5178] exit_group(0) = ?
[pid 5178] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5178, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./52", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./52/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./52/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
[ 129.107427][ T5178] RDX: 00007f78c70d01e9 RSI: 0000000000000000 RDI: 0000000020000080
[ 129.115502][ T5178] RBP: 0000000000000000 R08: 00007ffc16f92200 R09: 00007ffc16f92200
[ 129.123485][ T5178] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc16f921ec
[ 129.131465][ T5178] R13: 0000000000000034 R14: 431bde82d7b634db R15: 00007ffc16f92220
[ 129.139450][ T5178] </TASK>
unlink("./52/binderfs") = 0
umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./52/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./52/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./52/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./52") = 0
mkdir("./53", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5180 attached
, child_tidptr=0x555555807650) = 5180
[pid 5180] set_robust_list(0x555555807660, 24) = 0
[pid 5180] chdir("./53") = 0
[pid 5180] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5180] setpgid(0, 0) = 0
[pid 5180] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5180] write(3, "1000", 4) = 4
[pid 5180] close(3) = 0
[pid 5180] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5180] memfd_create("syzkaller", 0) = 3
[pid 5180] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5180] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5180] munmap(0x7f78bec91000, 138412032) = 0
[pid 5180] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5180] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5180] close(3) = 0
[pid 5180] mkdir("./file1", 0777) = 0
[pid 5180] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5180] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5180] chdir("./file1") = 0
[pid 5180] ioctl(4, LOOP_CLR_FD) = 0
[pid 5180] close(4) = 0
[ 129.377506][ T5180] loop0: detected capacity change from 0 to 512
[ 129.402677][ T5180] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 129.419043][ T5180] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5180] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5180] creat("./file1", 000) = 4
[pid 5180] exit_group(0) = ?
[pid 5180] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5180, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./53", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./53", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./53/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./53/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./53/binderfs") = 0
umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./53/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./53/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./53/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./53") = 0
mkdir("./54", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5182 attached
, child_tidptr=0x555555807650) = 5182
[pid 5182] set_robust_list(0x555555807660, 24) = 0
[pid 5182] chdir("./54") = 0
[pid 5182] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5182] setpgid(0, 0) = 0
[pid 5182] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5182] write(3, "1000", 4) = 4
[pid 5182] close(3) = 0
[pid 5182] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5182] memfd_create("syzkaller", 0) = 3
[pid 5182] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5182] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5182] munmap(0x7f78bec91000, 138412032) = 0
[pid 5182] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5182] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5182] close(3) = 0
[pid 5182] mkdir("./file1", 0777) = 0
[pid 5182] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5182] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5182] chdir("./file1") = 0
[pid 5182] ioctl(4, LOOP_CLR_FD) = 0
[pid 5182] close(4) = 0
[pid 5182] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 129.842917][ T5182] loop0: detected capacity change from 0 to 512
[ 129.859365][ T5182] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 129.876817][ T5182] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5182] creat("./file1", 000) = 4
[pid 5182] exit_group(0) = ?
[pid 5182] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5182, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./54", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./54", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./54/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./54/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./54/binderfs") = 0
umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./54/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./54/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./54/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./54") = 0
mkdir("./55", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5184 attached
, child_tidptr=0x555555807650) = 5184
[pid 5184] set_robust_list(0x555555807660, 24) = 0
[pid 5184] chdir("./55") = 0
[pid 5184] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5184] setpgid(0, 0) = 0
[pid 5184] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5184] write(3, "1000", 4) = 4
[pid 5184] close(3) = 0
[pid 5184] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5184] memfd_create("syzkaller", 0) = 3
[pid 5184] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5184] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5184] munmap(0x7f78bec91000, 138412032) = 0
[pid 5184] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5184] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5184] close(3) = 0
[pid 5184] mkdir("./file1", 0777) = 0
[pid 5184] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5184] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5184] chdir("./file1") = 0
[pid 5184] ioctl(4, LOOP_CLR_FD) = 0
[pid 5184] close(4) = 0
[pid 5184] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 130.147385][ T5184] loop0: detected capacity change from 0 to 512
[ 130.161511][ T5184] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 130.178102][ T5184] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5184] creat("./file1", 000) = 4
[pid 5184] exit_group(0) = ?
[pid 5184] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5184, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./55", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./55", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./55/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./55/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./55/binderfs") = 0
umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./55/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./55/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./55/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./55") = 0
mkdir("./56", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5186 attached
, child_tidptr=0x555555807650) = 5186
[pid 5186] set_robust_list(0x555555807660, 24) = 0
[pid 5186] chdir("./56") = 0
[pid 5186] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5186] setpgid(0, 0) = 0
[pid 5186] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5186] write(3, "1000", 4) = 4
[pid 5186] close(3) = 0
[pid 5186] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5186] memfd_create("syzkaller", 0) = 3
[pid 5186] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5186] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5186] munmap(0x7f78bec91000, 138412032) = 0
[pid 5186] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5186] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5186] close(3) = 0
[pid 5186] mkdir("./file1", 0777) = 0
[pid 5186] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5186] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5186] chdir("./file1") = 0
[pid 5186] ioctl(4, LOOP_CLR_FD) = 0
[pid 5186] close(4) = 0
[pid 5186] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5186] creat("./file1", 000) = 4
[pid 5186] exit_group(0) = ?
[pid 5186] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5186, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./56", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./56", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
[ 130.379065][ T5186] loop0: detected capacity change from 0 to 512
[ 130.393802][ T5186] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 130.409978][ T5186] EXT4-fs (loop0): 1 truncate cleaned up
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./56/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./56/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./56/binderfs") = 0
umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./56/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./56/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./56/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./56") = 0
mkdir("./57", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5188 attached
, child_tidptr=0x555555807650) = 5188
[pid 5188] set_robust_list(0x555555807660, 24) = 0
[pid 5188] chdir("./57") = 0
[pid 5188] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5188] setpgid(0, 0) = 0
[pid 5188] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5188] write(3, "1000", 4) = 4
[pid 5188] close(3) = 0
[pid 5188] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5188] memfd_create("syzkaller", 0) = 3
[pid 5188] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5188] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5188] munmap(0x7f78bec91000, 138412032) = 0
[pid 5188] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5188] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5188] close(3) = 0
[pid 5188] mkdir("./file1", 0777) = 0
[pid 5188] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5188] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5188] chdir("./file1") = 0
[pid 5188] ioctl(4, LOOP_CLR_FD) = 0
[pid 5188] close(4) = 0
[pid 5188] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 130.736702][ T5188] loop0: detected capacity change from 0 to 512
[ 130.751763][ T5188] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 130.768562][ T5188] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5188] creat("./file1", 000) = 4
[pid 5188] exit_group(0) = ?
[pid 5188] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5188, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./57", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./57", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./57/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./57/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./57/binderfs") = 0
umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./57/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./57/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./57/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./57") = 0
mkdir("./58", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5190 attached
, child_tidptr=0x555555807650) = 5190
[pid 5190] set_robust_list(0x555555807660, 24) = 0
[pid 5190] chdir("./58") = 0
[pid 5190] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5190] setpgid(0, 0) = 0
[pid 5190] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5190] write(3, "1000", 4) = 4
[pid 5190] close(3) = 0
[pid 5190] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5190] memfd_create("syzkaller", 0) = 3
[pid 5190] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5190] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5190] munmap(0x7f78bec91000, 138412032) = 0
[pid 5190] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5190] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5190] close(3) = 0
[pid 5190] mkdir("./file1", 0777) = 0
[pid 5190] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5190] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5190] chdir("./file1") = 0
[ 131.078932][ T5190] loop0: detected capacity change from 0 to 512
[ 131.103796][ T5190] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 131.120696][ T5190] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5190] ioctl(4, LOOP_CLR_FD) = 0
[pid 5190] close(4) = 0
[pid 5190] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5190] creat("./file1", 000) = 4
[pid 5190] exit_group(0) = ?
[pid 5190] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5190, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./58", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./58", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./58/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./58/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./58/binderfs") = 0
umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./58/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./58/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./58/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./58") = 0
mkdir("./59", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5192 attached
, child_tidptr=0x555555807650) = 5192
[pid 5192] set_robust_list(0x555555807660, 24) = 0
[pid 5192] chdir("./59") = 0
[pid 5192] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5192] setpgid(0, 0) = 0
[pid 5192] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5192] write(3, "1000", 4) = 4
[pid 5192] close(3) = 0
[pid 5192] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5192] memfd_create("syzkaller", 0) = 3
[pid 5192] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5192] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5192] munmap(0x7f78bec91000, 138412032) = 0
[pid 5192] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5192] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5192] close(3) = 0
[pid 5192] mkdir("./file1", 0777) = 0
[pid 5192] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5192] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5192] chdir("./file1") = 0
[pid 5192] ioctl(4, LOOP_CLR_FD) = 0
[ 131.533167][ T5192] loop0: detected capacity change from 0 to 512
[ 131.557933][ T5192] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 131.574063][ T5192] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5192] close(4) = 0
[pid 5192] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5192] creat("./file1", 000) = 4
[pid 5192] exit_group(0) = ?
[pid 5192] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5192, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./59", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./59", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./59/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./59/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./59/binderfs") = 0
umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./59/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./59/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./59/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./59") = 0
mkdir("./60", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5194 attached
, child_tidptr=0x555555807650) = 5194
[pid 5194] set_robust_list(0x555555807660, 24) = 0
[pid 5194] chdir("./60") = 0
[pid 5194] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5194] setpgid(0, 0) = 0
[pid 5194] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5194] write(3, "1000", 4) = 4
[pid 5194] close(3) = 0
[pid 5194] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5194] memfd_create("syzkaller", 0) = 3
[pid 5194] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5194] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5194] munmap(0x7f78bec91000, 138412032) = 0
[pid 5194] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5194] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5194] close(3) = 0
[pid 5194] mkdir("./file1", 0777) = 0
[pid 5194] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5194] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5194] chdir("./file1") = 0
[pid 5194] ioctl(4, LOOP_CLR_FD) = 0
[pid 5194] close(4) = 0
[pid 5194] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5194] creat("./file1", 000) = 4
[ 131.967554][ T5194] loop0: detected capacity change from 0 to 512
[ 131.992845][ T5194] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 132.009372][ T5194] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5194] exit_group(0) = ?
[pid 5194] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5194, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./60", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./60", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./60/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./60/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./60/binderfs") = 0
umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./60/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./60/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./60/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./60") = 0
mkdir("./61", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5196 attached
, child_tidptr=0x555555807650) = 5196
[pid 5196] set_robust_list(0x555555807660, 24) = 0
[pid 5196] chdir("./61") = 0
[pid 5196] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5196] setpgid(0, 0) = 0
[pid 5196] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5196] write(3, "1000", 4) = 4
[pid 5196] close(3) = 0
[pid 5196] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5196] memfd_create("syzkaller", 0) = 3
[pid 5196] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5196] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5196] munmap(0x7f78bec91000, 138412032) = 0
[pid 5196] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5196] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5196] close(3) = 0
[pid 5196] mkdir("./file1", 0777) = 0
[pid 5196] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5196] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5196] chdir("./file1") = 0
[pid 5196] ioctl(4, LOOP_CLR_FD) = 0
[pid 5196] close(4) = 0
[pid 5196] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5196] creat("./file1", 000) = 4
[pid 5196] exit_group(0) = ?
[ 132.309496][ T5196] loop0: detected capacity change from 0 to 512
[ 132.326074][ T5196] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 132.342530][ T5196] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5196] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5196, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./61", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./61", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./61/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./61/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./61/binderfs") = 0
umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./61/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./61/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./61/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./61") = 0
mkdir("./62", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5198 attached
, child_tidptr=0x555555807650) = 5198
[pid 5198] set_robust_list(0x555555807660, 24) = 0
[pid 5198] chdir("./62") = 0
[pid 5198] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5198] setpgid(0, 0) = 0
[pid 5198] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5198] write(3, "1000", 4) = 4
[pid 5198] close(3) = 0
[pid 5198] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5198] memfd_create("syzkaller", 0) = 3
[pid 5198] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5198] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5198] munmap(0x7f78bec91000, 138412032) = 0
[pid 5198] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5198] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5198] close(3) = 0
[pid 5198] mkdir("./file1", 0777) = 0
[pid 5198] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5198] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5198] chdir("./file1") = 0
[pid 5198] ioctl(4, LOOP_CLR_FD) = 0
[pid 5198] close(4) = 0
[ 132.607979][ T5198] loop0: detected capacity change from 0 to 512
[ 132.618405][ T5198] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 132.634551][ T5198] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5198] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5198] creat("./file1", 000) = 4
[pid 5198] exit_group(0) = ?
[pid 5198] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5198, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./62", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./62", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./62/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./62/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./62/binderfs") = 0
umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./62/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./62/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./62/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./62") = 0
mkdir("./63", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5200 attached
, child_tidptr=0x555555807650) = 5200
[pid 5200] set_robust_list(0x555555807660, 24) = 0
[pid 5200] chdir("./63") = 0
[pid 5200] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5200] setpgid(0, 0) = 0
[pid 5200] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5200] write(3, "1000", 4) = 4
[pid 5200] close(3) = 0
[pid 5200] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5200] memfd_create("syzkaller", 0) = 3
[pid 5200] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5200] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5200] munmap(0x7f78bec91000, 138412032) = 0
[pid 5200] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5200] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5200] close(3) = 0
[pid 5200] mkdir("./file1", 0777) = 0
[ 132.903397][ T5200] loop0: detected capacity change from 0 to 512
[ 132.931513][ T5200] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5200] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5200] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5200] chdir("./file1") = 0
[pid 5200] ioctl(4, LOOP_CLR_FD) = 0
[pid 5200] close(4) = 0
[pid 5200] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5200] creat("./file1", 000) = 4
[ 132.958606][ T5200] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5200] exit_group(0) = ?
[pid 5200] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5200, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./63", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./63", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./63/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./63/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./63/binderfs") = 0
umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./63/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./63/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./63/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./63") = 0
mkdir("./64", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5202 attached
, child_tidptr=0x555555807650) = 5202
[pid 5202] set_robust_list(0x555555807660, 24) = 0
[pid 5202] chdir("./64") = 0
[pid 5202] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5202] setpgid(0, 0) = 0
[pid 5202] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5202] write(3, "1000", 4) = 4
[pid 5202] close(3) = 0
[pid 5202] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5202] memfd_create("syzkaller", 0) = 3
[pid 5202] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5202] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5202] munmap(0x7f78bec91000, 138412032) = 0
[pid 5202] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5202] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5202] close(3) = 0
[pid 5202] mkdir("./file1", 0777) = 0
[pid 5202] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5202] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5202] chdir("./file1") = 0
[pid 5202] ioctl(4, LOOP_CLR_FD) = 0
[pid 5202] close(4) = 0
[pid 5202] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5202] creat("./file1", 000) = 4
[pid 5202] exit_group(0) = ?
[pid 5202] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5202, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
[ 133.303342][ T5202] loop0: detected capacity change from 0 to 512
[ 133.328496][ T5202] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 133.344531][ T5202] EXT4-fs (loop0): 1 truncate cleaned up
umount2("./64", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./64/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./64/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./64/binderfs") = 0
umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./64/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./64/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./64/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./64") = 0
mkdir("./65", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5204 attached
, child_tidptr=0x555555807650) = 5204
[pid 5204] set_robust_list(0x555555807660, 24) = 0
[pid 5204] chdir("./65") = 0
[pid 5204] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5204] setpgid(0, 0) = 0
[pid 5204] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5204] write(3, "1000", 4) = 4
[pid 5204] close(3) = 0
[pid 5204] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5204] memfd_create("syzkaller", 0) = 3
[pid 5204] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5204] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5204] munmap(0x7f78bec91000, 138412032) = 0
[pid 5204] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5204] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5204] close(3) = 0
[pid 5204] mkdir("./file1", 0777) = 0
[pid 5204] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5204] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5204] chdir("./file1") = 0
[pid 5204] ioctl(4, LOOP_CLR_FD) = 0
[pid 5204] close(4) = 0
[ 133.654185][ T5204] loop0: detected capacity change from 0 to 512
[ 133.669324][ T5204] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 133.685367][ T5204] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5204] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5204] creat("./file1", 000) = 4
[pid 5204] exit_group(0) = ?
[pid 5204] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5204, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./65", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./65", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./65/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./65/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./65/binderfs") = 0
umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./65/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./65/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./65/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./65") = 0
mkdir("./66", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5206 attached
, child_tidptr=0x555555807650) = 5206
[pid 5206] set_robust_list(0x555555807660, 24) = 0
[pid 5206] chdir("./66") = 0
[pid 5206] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5206] setpgid(0, 0) = 0
[pid 5206] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5206] write(3, "1000", 4) = 4
[pid 5206] close(3) = 0
[pid 5206] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5206] memfd_create("syzkaller", 0) = 3
[pid 5206] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5206] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5206] munmap(0x7f78bec91000, 138412032) = 0
[pid 5206] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5206] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5206] close(3) = 0
[pid 5206] mkdir("./file1", 0777) = 0
[pid 5206] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5206] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5206] chdir("./file1") = 0
[pid 5206] ioctl(4, LOOP_CLR_FD) = 0
[pid 5206] close(4) = 0
[ 133.967911][ T5206] loop0: detected capacity change from 0 to 512
[ 133.992225][ T5206] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 134.009202][ T5206] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5206] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5206] creat("./file1", 000) = 4
[pid 5206] exit_group(0) = ?
[pid 5206] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5206, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./66", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./66", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./66/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./66/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./66/binderfs") = 0
umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./66/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./66/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./66/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./66") = 0
mkdir("./67", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5209 attached
<unfinished ...>
[pid 5209] set_robust_list(0x555555807660, 24 <unfinished ...>
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5209
[pid 5209] <... set_robust_list resumed>) = 0
[pid 5209] chdir("./67") = 0
[pid 5209] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5209] setpgid(0, 0) = 0
[pid 5209] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5209] write(3, "1000", 4) = 4
[pid 5209] close(3) = 0
[pid 5209] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5209] memfd_create("syzkaller", 0) = 3
[pid 5209] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5209] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5209] munmap(0x7f78bec91000, 138412032) = 0
[pid 5209] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5209] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5209] close(3) = 0
[pid 5209] mkdir("./file1", 0777) = 0
[pid 5209] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5209] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5209] chdir("./file1") = 0
[pid 5209] ioctl(4, LOOP_CLR_FD) = 0
[pid 5209] close(4) = 0
[pid 5209] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5209] creat("./file1", 000) = 4
[ 134.299609][ T5209] loop0: detected capacity change from 0 to 512
[ 134.314961][ T5209] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 134.331184][ T5209] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5209] exit_group(0) = ?
[pid 5209] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5209, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./67", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./67", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./67/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./67/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./67/binderfs") = 0
umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./67/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./67/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./67/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./67") = 0
mkdir("./68", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5211 attached
, child_tidptr=0x555555807650) = 5211
[pid 5211] set_robust_list(0x555555807660, 24) = 0
[pid 5211] chdir("./68") = 0
[pid 5211] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5211] setpgid(0, 0) = 0
[pid 5211] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5211] write(3, "1000", 4) = 4
[pid 5211] close(3) = 0
[pid 5211] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5211] memfd_create("syzkaller", 0) = 3
[pid 5211] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5211] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5211] munmap(0x7f78bec91000, 138412032) = 0
[pid 5211] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5211] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5211] close(3) = 0
[pid 5211] mkdir("./file1", 0777) = 0
[pid 5211] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5211] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5211] chdir("./file1") = 0
[pid 5211] ioctl(4, LOOP_CLR_FD) = 0
[pid 5211] close(4) = 0
[ 134.632537][ T5211] loop0: detected capacity change from 0 to 512
[ 134.646114][ T5211] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 134.662154][ T5211] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5211] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5211] creat("./file1", 000) = 4
[pid 5211] exit_group(0) = ?
[pid 5211] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5211, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./68", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./68", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./68/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./68/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./68/binderfs") = 0
umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./68/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./68/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./68/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./68") = 0
mkdir("./69", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5213 attached
, child_tidptr=0x555555807650) = 5213
[pid 5213] set_robust_list(0x555555807660, 24) = 0
[pid 5213] chdir("./69") = 0
[pid 5213] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5213] setpgid(0, 0) = 0
[pid 5213] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5213] write(3, "1000", 4) = 4
[pid 5213] close(3) = 0
[pid 5213] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5213] memfd_create("syzkaller", 0) = 3
[pid 5213] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5213] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5213] munmap(0x7f78bec91000, 138412032) = 0
[pid 5213] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5213] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5213] close(3) = 0
[pid 5213] mkdir("./file1", 0777) = 0
[pid 5213] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5213] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5213] chdir("./file1") = 0
[pid 5213] ioctl(4, LOOP_CLR_FD) = 0
[pid 5213] close(4) = 0
[ 135.006011][ T5213] loop0: detected capacity change from 0 to 512
[ 135.020873][ T5213] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 135.037613][ T5213] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5213] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5213] creat("./file1", 000) = 4
[pid 5213] exit_group(0) = ?
[pid 5213] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5213, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./69", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./69", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./69/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./69/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./69/binderfs") = 0
umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./69/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./69/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./69/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./69") = 0
mkdir("./70", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5216 attached
, child_tidptr=0x555555807650) = 5216
[pid 5216] set_robust_list(0x555555807660, 24) = 0
[pid 5216] chdir("./70") = 0
[pid 5216] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5216] setpgid(0, 0) = 0
[pid 5216] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5216] write(3, "1000", 4) = 4
[pid 5216] close(3) = 0
[pid 5216] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5216] memfd_create("syzkaller", 0) = 3
[pid 5216] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5216] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5216] munmap(0x7f78bec91000, 138412032) = 0
[pid 5216] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5216] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5216] close(3) = 0
[pid 5216] mkdir("./file1", 0777) = 0
[ 135.360821][ T5216] loop0: detected capacity change from 0 to 512
[ 135.392009][ T5216] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5216] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5216] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5216] chdir("./file1") = 0
[pid 5216] ioctl(4, LOOP_CLR_FD) = 0
[pid 5216] close(4) = 0
[ 135.409082][ T5216] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5216] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5216] creat("./file1", 000) = 4
[pid 5216] exit_group(0) = ?
[pid 5216] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5216, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
umount2("./70", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./70", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./70/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./70/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./70/binderfs") = 0
umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./70/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./70/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./70/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./70") = 0
mkdir("./71", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5218 attached
, child_tidptr=0x555555807650) = 5218
[pid 5218] set_robust_list(0x555555807660, 24) = 0
[pid 5218] chdir("./71") = 0
[pid 5218] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5218] setpgid(0, 0) = 0
[pid 5218] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5218] write(3, "1000", 4) = 4
[pid 5218] close(3) = 0
[pid 5218] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5218] memfd_create("syzkaller", 0) = 3
[pid 5218] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5218] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5218] munmap(0x7f78bec91000, 138412032) = 0
[pid 5218] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5218] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5218] close(3) = 0
[pid 5218] mkdir("./file1", 0777) = 0
[pid 5218] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5218] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5218] chdir("./file1") = 0
[pid 5218] ioctl(4, LOOP_CLR_FD) = 0
[pid 5218] close(4) = 0
[pid 5218] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5218] creat("./file1", 000) = 4
[pid 5218] exit_group(0) = ?
[pid 5218] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5218, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./71", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./71", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
[ 135.719181][ T5218] loop0: detected capacity change from 0 to 512
[ 135.734454][ T5218] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 135.751103][ T5218] EXT4-fs (loop0): 1 truncate cleaned up
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./71/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./71/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./71/binderfs") = 0
umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./71/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./71/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./71/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./71") = 0
mkdir("./72", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5221 attached
, child_tidptr=0x555555807650) = 5221
[pid 5221] set_robust_list(0x555555807660, 24) = 0
[pid 5221] chdir("./72") = 0
[pid 5221] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5221] setpgid(0, 0) = 0
[pid 5221] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5221] write(3, "1000", 4) = 4
[pid 5221] close(3) = 0
[pid 5221] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5221] memfd_create("syzkaller", 0) = 3
[pid 5221] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5221] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5221] munmap(0x7f78bec91000, 138412032) = 0
[pid 5221] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5221] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5221] close(3) = 0
[pid 5221] mkdir("./file1", 0777) = 0
[pid 5221] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5221] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5221] chdir("./file1") = 0
[pid 5221] ioctl(4, LOOP_CLR_FD) = 0
[ 136.071544][ T5221] loop0: detected capacity change from 0 to 512
[ 136.096613][ T5221] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 136.112830][ T5221] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5221] close(4) = 0
[pid 5221] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5221] creat("./file1", 000) = 4
[pid 5221] exit_group(0) = ?
[pid 5221] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5221, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./72", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./72", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./72/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./72/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./72/binderfs") = 0
umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./72/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./72/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./72/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./72") = 0
mkdir("./73", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5223 attached
, child_tidptr=0x555555807650) = 5223
[pid 5223] set_robust_list(0x555555807660, 24) = 0
[pid 5223] chdir("./73") = 0
[pid 5223] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5223] setpgid(0, 0) = 0
[pid 5223] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5223] write(3, "1000", 4) = 4
[pid 5223] close(3) = 0
[pid 5223] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5223] memfd_create("syzkaller", 0) = 3
[pid 5223] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5223] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5223] munmap(0x7f78bec91000, 138412032) = 0
[pid 5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5223] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5223] close(3) = 0
[pid 5223] mkdir("./file1", 0777) = 0
[ 136.383318][ T5223] loop0: detected capacity change from 0 to 512
[ 136.420396][ T5223] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[pid 5223] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5223] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5223] chdir("./file1") = 0
[pid 5223] ioctl(4, LOOP_CLR_FD) = 0
[pid 5223] close(4) = 0
[pid 5223] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[ 136.438986][ T5223] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5223] creat("./file1", 000) = 4
[pid 5223] exit_group(0) = ?
[pid 5223] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5223, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./73", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./73", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./73/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./73/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./73/binderfs") = 0
umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./73/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./73/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./73/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./73") = 0
mkdir("./74", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5227 attached
, child_tidptr=0x555555807650) = 5227
[pid 5227] set_robust_list(0x555555807660, 24) = 0
[pid 5227] chdir("./74") = 0
[pid 5227] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5227] setpgid(0, 0) = 0
[pid 5227] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5227] write(3, "1000", 4) = 4
[pid 5227] close(3) = 0
[pid 5227] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5227] memfd_create("syzkaller", 0) = 3
[pid 5227] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5227] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5227] munmap(0x7f78bec91000, 138412032) = 0
[pid 5227] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5227] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5227] close(3) = 0
[pid 5227] mkdir("./file1", 0777) = 0
[pid 5227] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5227] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5227] chdir("./file1") = 0
[pid 5227] ioctl(4, LOOP_CLR_FD) = 0
[pid 5227] close(4) = 0
[pid 5227] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5227] creat("./file1", 000) = 4
[pid 5227] exit_group(0) = ?
[pid 5227] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5227, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./74", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[ 136.813311][ T5227] loop0: detected capacity change from 0 to 512
[ 136.837110][ T5227] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 136.853779][ T5227] EXT4-fs (loop0): 1 truncate cleaned up
openat(AT_FDCWD, "./74", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./74/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./74/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./74/binderfs") = 0
umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./74/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./74/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./74/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./74") = 0
mkdir("./75", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5229 attached
, child_tidptr=0x555555807650) = 5229
[pid 5229] set_robust_list(0x555555807660, 24) = 0
[pid 5229] chdir("./75") = 0
[pid 5229] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5229] setpgid(0, 0) = 0
[pid 5229] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5229] write(3, "1000", 4) = 4
[pid 5229] close(3) = 0
[pid 5229] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5229] memfd_create("syzkaller", 0) = 3
[pid 5229] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5229] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5229] munmap(0x7f78bec91000, 138412032) = 0
[pid 5229] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5229] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5229] close(3) = 0
[pid 5229] mkdir("./file1", 0777) = 0
[pid 5229] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5229] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5229] chdir("./file1") = 0
[pid 5229] ioctl(4, LOOP_CLR_FD) = 0
[pid 5229] close(4) = 0
[ 137.067956][ T5229] loop0: detected capacity change from 0 to 512
[ 137.082972][ T5229] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 137.099101][ T5229] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5229] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5229] creat("./file1", 000) = 4
[pid 5229] exit_group(0) = ?
[pid 5229] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5229, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./75", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./75", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./75/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./75/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./75/binderfs") = 0
umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./75/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./75/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./75/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./75") = 0
mkdir("./76", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5231 attached
, child_tidptr=0x555555807650) = 5231
[pid 5231] set_robust_list(0x555555807660, 24) = 0
[pid 5231] chdir("./76") = 0
[pid 5231] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5231] setpgid(0, 0) = 0
[pid 5231] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5231] write(3, "1000", 4) = 4
[pid 5231] close(3) = 0
[pid 5231] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5231] memfd_create("syzkaller", 0) = 3
[pid 5231] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5231] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5231] munmap(0x7f78bec91000, 138412032) = 0
[pid 5231] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5231] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5231] close(3) = 0
[pid 5231] mkdir("./file1", 0777) = 0
[ 137.454622][ T5231] loop0: detected capacity change from 0 to 512
[ 137.475564][ T5231] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 137.491942][ T5231] EXT4-fs (loop0): 1 truncate cleaned up
[ 137.497795][ T5231] EXT4-fs mount: 88 callbacks suppressed
[pid 5231] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5231] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5231] chdir("./file1") = 0
[pid 5231] ioctl(4, LOOP_CLR_FD) = 0
[pid 5231] close(4) = 0
[pid 5231] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5231] creat("./file1", 000) = 4
[ 137.497814][ T5231] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5231] exit_group(0) = ?
[pid 5231] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5231, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./76", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./76", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./76/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./76/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./76/binderfs") = 0
umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./76/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./76/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[ 137.666264][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./76/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./76") = 0
mkdir("./77", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5233 attached
<unfinished ...>
[pid 5233] set_robust_list(0x555555807660, 24) = 0
[pid 5065] <... clone resumed>, child_tidptr=0x555555807650) = 5233
[pid 5233] chdir("./77") = 0
[pid 5233] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5233] setpgid(0, 0) = 0
[pid 5233] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5233] write(3, "1000", 4) = 4
[pid 5233] close(3) = 0
[pid 5233] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5233] memfd_create("syzkaller", 0) = 3
[pid 5233] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5233] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5233] munmap(0x7f78bec91000, 138412032) = 0
[pid 5233] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5233] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5233] close(3) = 0
[pid 5233] mkdir("./file1", 0777) = 0
[ 137.872047][ T5233] loop0: detected capacity change from 0 to 512
[ 137.892041][ T5233] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 137.908851][ T5233] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5233] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5233] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5233] chdir("./file1") = 0
[pid 5233] ioctl(4, LOOP_CLR_FD) = 0
[pid 5233] close(4) = 0
[pid 5233] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5233] creat("./file1", 000) = 4
[ 137.914529][ T5233] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5233] exit_group(0) = ?
[pid 5233] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5233, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./77", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./77", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./77/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./77/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./77/binderfs") = 0
umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./77/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[ 137.983134][ T5065] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
openat(AT_FDCWD, "./77/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555555810730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555555810730 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./77/file1") = 0
getdents64(3, 0x5555558086f0 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./77") = 0
mkdir("./78", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5236 attached
, child_tidptr=0x555555807650) = 5236
[pid 5236] set_robust_list(0x555555807660, 24) = 0
[pid 5236] chdir("./78") = 0
[pid 5236] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5236] setpgid(0, 0) = 0
[pid 5236] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5236] write(3, "1000", 4) = 4
[pid 5236] close(3) = 0
[pid 5236] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5236] memfd_create("syzkaller", 0) = 3
[pid 5236] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f78bec91000
[pid 5236] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5236] munmap(0x7f78bec91000, 138412032) = 0
[pid 5236] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5236] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5236] close(3) = 0
[pid 5236] mkdir("./file1", 0777) = 0
[ 138.185047][ T5236] loop0: detected capacity change from 0 to 512
[ 138.200348][ T5236] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
[ 138.218081][ T5236] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5236] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0
[pid 5236] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5236] chdir("./file1") = 0
[pid 5236] ioctl(4, LOOP_CLR_FD) = 0
[pid 5236] close(4) = 0
[ 138.223872][ T5236] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
[pid 5236] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x71\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 65111, 0) = 0
[pid 5236] creat("./file1", 000) = 4
[pid 5236] exit_group(0) = ?
[pid 5236] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5236, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./78", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./78", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x5555558086f0 /* 4 entries */, 32768) = 112
umount2("./78/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./78/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./78/binderfs") = 0
umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)