./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor390552505
<...>
forked to background, child pid 3188
no interfaces have a carrier
[ 20.502705][ T3189] 8021q: adding VLAN 0 to HW filter on device bond0
[ 20.504635][ T3189] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK
syzkaller
Warning: Permanently added '10.128.0.116' (ECDSA) to the list of known hosts.
execve("./syz-executor390552505", ["./syz-executor390552505"], 0x7ffc6cde6fe0 /* 10 vars */) = 0
brk(NULL) = 0x555557248000
brk(0x555557248c40) = 0x555557248c40
arch_prctl(ARCH_SET_FS, 0x555557248300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
set_tid_address(0x5555572485d0) = 3616
set_robust_list(0x5555572485e0, 24) = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7fcc5655a250, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fcc5655a920}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7fcc5655a2f0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc5655a920}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor390552505", 4096) = 27
brk(0x555557269c40) = 0x555557269c40
brk(0x55555726a000) = 0x55555726a000
mprotect(0x7fcc5661c000, 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
chmod("/dev/raw-gadget", 0666) = 0
unshare(CLONE_NEWPID) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3617 attached
, child_tidptr=0x5555572485d0) = 3617
[pid 3617] set_robust_list(0x5555572485e0, 24) = 0
[pid 3617] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid 3617] socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI) = 3
[pid 3617] openat(AT_FDCWD, "/dev/vhci", O_RDWR) = 4
[pid 3617] dup2(4, 202) = 202
[pid 3617] close(4) = 0
[pid 3617] read(202, "\xff\x00\x00\x00", 4) = 4
[pid 3617] mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc55d49000
[pid 3617] mprotect(0x7fcc55d4a000, 8388608, PROT_READ|PROT_WRITE) = 0
[pid 3617] clone(child_stack=0x7fcc565493f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2], tls=0x7fcc56549700, child_tidptr=0x7fcc565499d0) = 2
[pid 3617] ioctl(3, HCIDEVUP./strace-static-x86_64: Process 3621 attached
<unfinished ...>
[pid 3621] set_robust_list(0x7fcc565499e0, 24) = 0
[pid 3621] read(202, "\x01\x03\x0c\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x03\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x03\x10\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x03\x10", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x01\x10\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x01\x10", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x09\x10\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\x0a", iov_len=2}, {iov_base="\x01\x09\x10", iov_len=3}, {iov_base="\x00\xaa\xaa\xaa\xaa\xaa\xaa", iov_len=7}], 4) = 13
[pid 3621] read(202, "\x01\x05\x10\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\x0b", iov_len=2}, {iov_base="\x01\x05\x10", iov_len=3}, {iov_base="\x00\xfd\x03\x60\x04\x00\x06\x00", iov_len=8}], 4) = 14
[pid 3621] read(202, "\x01\x23\x0c\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x23\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x14\x0c\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x14\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x25\x0c\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x25\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x38\x0c\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x38\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x39\x0c\x00", 1024) = 4
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x39\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255
[pid 3621] read(202, "\x01\x16\x0c\x02\x00\x7d", 1024) = 6
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x16\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4 <unfinished ...>
[pid 3617] <... ioctl resumed>, 0) = -1 EALREADY (Operation already in progress)
[pid 3617] ioctl(3, HCISETSCAN <unfinished ...>
[pid 3621] <... writev resumed>) = 255
[pid 3621] read(202, "\x01\x1a\x0c\x01\x02", 1024) = 5
[pid 3621] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\x04", iov_len=2}, {iov_base="\x01\x1a\x0c", iov_len=3}, {iov_base="\x00", iov_len=1}], 4 <unfinished ...>
[pid 3617] <... ioctl resumed>, 0x7ffd5f997700) = 0
[pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x04\x0a", iov_len=2}, {iov_base="\xaa\xaa\xaa\xaa\xaa\x10\x00\x00\x00\x01", iov_len=10}], 3) = 13
[pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x03\x0b", iov_len=2}, {iov_base="\x00\xc8\x00\xaa\xaa\xaa\xaa\xaa\x10\x01\x00", iov_len=11}], 3) = 14
[pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\v\v", iov_len=2}, {iov_base="\x00\xc8\x00\x00\x00\x00\x00\x00\x00\x00\x00", iov_len=11}], 3) = 14
[pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x3e\x13", iov_len=2}, {iov_base="\x01\x00\xc9\x00\x01\x00\xaa\xaa\xaa\xaa\xaa\x11\x00\x00\x00\x00\x00\x00\x00", iov_len=19}], 3) = 22
[pid 3617] futex(0x7fcc565499d0, FUTEX_WAIT, 2, NULL <unfinished ...>
[pid 3621] <... writev resumed>) = 7
[pid 3621] madvise(0x7fcc55d49000, 8372224, MADV_DONTNEED) = 0
[pid 3621] exit(0) = ?
[pid 3617] <... futex resumed>) = 0
[pid 3617] close(3) = 0
[pid 3617] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 3617] setsid() = 1
[pid 3617] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid 3617] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid 3617] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid 3617] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid 3617] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0
[pid 3617] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid 3617] unshare(CLONE_NEWNS) = 0
[pid 3617] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid 3617] unshare(CLONE_NEWIPC) = 0
[pid 3617] unshare(CLONE_NEWCGROUP) = 0
[pid 3617] unshare(CLONE_NEWUTS) = 0
[pid 3617] unshare(CLONE_SYSVSEM) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "16777216", 8) = 8
[pid 3617] close(3) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "536870912", 9) = 9
[pid 3617] close(3) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "1024", 4) = 4
[pid 3617] close(3) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "8192", 4 <unfinished ...>
[pid 3621] +++ exited with 0 +++
[pid 3617] <... write resumed>) = 4
[pid 3617] close(3) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "1024", 4) = 4
[pid 3617] close(3) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "1024", 4) = 4
[pid 3617] close(3) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "1024 1048576 500 1024", 21) = 21
[pid 3617] close(3) = 0
[pid 3617] getpid() = 1
[pid 3617] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid 3617] capset({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid 3617] unshare(CLONE_NEWNET) = 0
[pid 3617] openat(AT_FDCWD, "/dev/net/tun", O_RDWR|O_NONBLOCK) = 3
[pid 3617] dup2(3, 200) = 200
[pid 3617] close(3) = 0
[pid 3617] ioctl(200, TUNSETIFF, 0x7ffd5f997760) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/net/ipv6/conf/syz_tun/accept_dad", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "0", 1) = 1
[pid 3617] close(3) = 0
[pid 3617] openat(AT_FDCWD, "/proc/sys/net/ipv6/conf/syz_tun/router_solicitations", O_WRONLY|O_CLOEXEC) = 3
[pid 3617] write(3, "0", 1) = 1
[pid 3617] close(3) = 0
[pid 3617] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3
[pid 3617] access("/proc/net", R_OK) = 0
[pid 3617] access("/proc/net/unix", R_OK) = 0
[pid 3617] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid 3617] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid 3617] close(4) = 0
[pid 3617] sendto(3, [{nlmsg_len=40, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}, "\x02\x18\x00\x00\x0b\x00\x00\x00\x08\x00\x02\x00\xac\x14\x14\xaa\x08\x00\x01\x00\xac\x14\x14\xaa"], 40, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 40
[pid 3617] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=40, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid 3617] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid 3617] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid 3617] close(4) = 0
[pid 3617] sendto(3, [{nlmsg_len=64, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}, "\x0a\x78\x00\x00\x0b\x00\x00\x00\x14\x00\x02\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa\x14\x00\x01\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa"], 64, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 64
[pid 3617] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=64, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid 3617] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid 3617] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid 3617] close(4) = 0
[pid 3617] sendto(3, [{nlmsg_len=48, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}, "\x02\x00\x00\x00\x0b\x00\x00\x00\x80\x00\x00\x00\x08\x00\x01\x00\xac\x14\x14\xbb\x0a\x00\x02\x00\xbb\xaa\xaa\xaa\xaa\xaa\x00\x00"], 48, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 48
[pid 3617] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=48, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid 3617] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid 3617] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid 3617] close(4) = 0
[pid 3617] sendto(3, [{nlmsg_len=60, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}, "\x0a\x00\x00\x00\x0b\x00\x00\x00\x80\x00\x00\x00\x14\x00\x01\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xbb\x0a\x00\x02\x00\xbb\xaa\xaa\xaa\xaa\xaa\x00\x00"], 60, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 60
[pid 3617] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=60, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid 3617] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid 3617] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid 3617] close(4) = 0
syzkaller login: [ 36.770230][ T3618] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 36.772169][ T3619] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 36.774267][ T3619] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 36.777427][ T3619] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 36.780201][ T3618] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
[ 36.781330][ T3618] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[pid 3617] sendto(3, [{nlmsg_len=44, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x00\x00\x00\x00\x0b\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x0a\x00\x01\x00\xaa\xaa\xaa\xaa\xaa\xaa\x00\x00"], 44, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 44
[pid 3617] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=44, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid 3617] close(3) = 0
[pid 3617] mkdir("/dev/binderfs", 0777) = 0
[pid 3617] mount("binder", "/dev/binderfs", "binder", 0, NULL) = 0
[pid 3617] symlink("/dev/binderfs", "./binderfs") = 0
[pid 3617] futex(0x7fcc566224cc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 3617] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc55d28000
[pid 3617] mprotect(0x7fcc55d29000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 3617] clone(child_stack=0x7fcc55d483f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3622 attached
, parent_tid=[3], tls=0x7fcc55d48700, child_tidptr=0x7fcc55d489d0) = 3
[pid 3622] set_robust_list(0x7fcc55d489e0, 24) = 0
[pid 3622] futex(0x7fcc566224c8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 3617] futex(0x7fcc566224c8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 3622] <... futex resumed>) = 0
[pid 3617] futex(0x7fcc566224cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 3622] pipe([3, 4]) = 0
[pid 3622] futex(0x7fcc566224cc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 3617] <... futex resumed>) = 0
[pid 3617] futex(0x7fcc566224c8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 3617] futex(0x7fcc566224cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 3622] pipe2([5, 6], O_EXCL) = 0
[pid 3622] futex(0x7fcc566224cc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 3622] futex(0x7fcc566224c8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 3617] <... futex resumed>) = 0
[pid 3617] futex(0x7fcc566224c8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 3617] futex(0x7fcc566224cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 3622] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 3622] splice(3, NULL, 6, NULL, 511, 0 <unfinished ...>
[pid 3617] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out)
[pid 3617] futex(0x7fcc566224dc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 3617] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc55d07000
[pid 3617] mprotect(0x7fcc55d08000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 3617] clone(child_stack=0x7fcc55d273f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3623 attached
, parent_tid=[4], tls=0x7fcc55d27700, child_tidptr=0x7fcc55d279d0) = 4
[pid 3617] futex(0x7fcc566224d8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 3617] futex(0x7fcc566224dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 3623] set_robust_list(0x7fcc55d279e0, 24) = 0
[pid 3623] vmsplice(4, [{iov_base="\xb5", iov_len=1}], 1, 0) = 1
[pid 3623] futex(0x7fcc566224dc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 3623] futex(0x7fcc566224d8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 3617] <... futex resumed>) = 0
[pid 3622] <... splice resumed>) = -1 EXDEV (Invalid cross-device link)
[pid 3622] futex(0x7fcc566224cc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 3622] futex(0x7fcc566224c8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 3617] exit_group(1) = ?
[pid 3622] <... futex resumed>) = ?
[pid 3622] +++ exited with 1 +++
[pid 3623] <... futex resumed>) = ?
[ 36.930660][ T3622]
[ 36.930668][ T3622] ============================================
[ 36.930672][ T3622] WARNING: possible recursive locking detected
[ 36.930677][ T3622] 5.19.0-rc1-syzkaller-00003-ge71e60cd74df #0 Not tainted
[ 36.930686][ T3622] --------------------------------------------
[ 36.930691][ T3622] syz-executor390/3622 is trying to acquire lock:
[ 36.930700][ T3622] ffff88801bd29068 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_write+0x132/0x1bf0
[ 36.930752][ T3622]
[pid 3623] +++ exited with 1 +++
[pid 3617] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3617, si_uid=0, si_status=1, si_utime=0, si_stime=6} ---
[ 36.930752][ T3622] but task is already holding lock:
[ 36.930756][ T3622] ffff88801bd28c68 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_wait_readable+0x39b/0x420
[ 36.930795][ T3622]
[ 36.930795][ T3622] other info that might help us debug this:
[ 36.930799][ T3622] Possible unsafe locking scenario:
[ 36.930799][ T3622]
[ 36.930802][ T3622] CPU0
[ 36.930805][ T3622] ----
[ 36.930807][ T3622] lock(&pipe->mutex/1);
[ 36.930821][ T3622] lock(&pipe->mutex/1);
[ 36.930837][ T3622]
[ 36.930837][ T3622] *** DEADLOCK ***
[ 36.930837][ T3622]
exit_group(0) = ?
+++ exited with 0 +++
[ 36.93