./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2496350457 <...> Warning: Permanently added '10.128.1.56' (ED25519) to the list of known hosts. execve("./syz-executor2496350457", ["./syz-executor2496350457"], 0x7ffe4db2a060 /* 10 vars */) = 0 brk(NULL) = 0x555568d34000 brk(0x555568d34e00) = 0x555568d34e00 arch_prctl(ARCH_SET_FS, 0x555568d34480) = 0 set_tid_address(0x555568d34750) = 5836 set_robust_list(0x555568d34760, 24) = 0 rseq(0x555568d34da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2496350457", 4096) = 28 getrandom("\x15\xbb\x24\x0c\xb4\x31\xd2\x74", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555568d34e00 brk(0x555568d55e00) = 0x555568d55e00 brk(0x555568d56000) = 0x555568d56000 mprotect(0x7f77839b4000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7f7783906a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f778390f5e0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f7783906a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f778390f5e0}, NULL, 8) = 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 5837 attached [pid 5837] set_robust_list(0x555568d34760, 24) = 0 [pid 5837] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5836] <... clone resumed>, child_tidptr=0x555568d34750) = 5837 [pid 5837] <... prctl resumed>) = 0 [pid 5837] setpgid(0, 0) = 0 [pid 5837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "1000", 4) = 4 [pid 5837] close(3) = 0 executing program [pid 5837] write(1, "executing program\n", 18) = 18 [pid 5837] memfd_create("syzkaller", 0) = 3 [pid 5837] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5837] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5837] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5837] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5837] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5837] close(3) = 0 [pid 5837] close(4) = 0 [pid 5837] mkdir("./file1", 0777) = 0 [ 86.693062][ T5837] loop0: detected capacity change from 0 to 32768 [ 86.714007][ T5837] ======================================================= [ 86.714007][ T5837] WARNING: The mand mount option has been deprecated and [ 86.714007][ T5837] and is ignored by this kernel. Remove the mand [ 86.714007][ T5837] option from the mount to silence this warning. [pid 5837] mount("/dev/loop0", "./file1", "ocfs2", MS_SYNCHRONOUS|MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME|MS_STRICTATIME, "acl,heartbeat=none,errors=remount-ro,coherency=full,preferred_slot=00000000000000000001,localflocks,"...) = 0 [pid 5837] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [ 86.714007][ T5837] ======================================================= [pid 5837] chdir("./file1") = 0 [pid 5837] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5837] mkdirat(AT_FDCWD, "./file0", 0700) = 0 [ 86.763880][ T5837] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. [pid 5837] mkdir("./bus", 0777) = 0 [pid 5837] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5837] mkdirat(AT_FDCWD, "./file1", 0700) = 0 [ 86.851546][ T5837] overlayfs: upper fs does not support tmpfile. [ 86.857195][ T5837] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 86.857585][ T5837] [ 86.857591][ T5837] ====================================================== [ 86.857594][ T5837] WARNING: possible circular locking dependency detected [ 86.857605][ T5837] 6.16.0-syzkaller-11743-g6bcdbd62bd56 #0 Tainted: G W [ 86.857611][ T5837] ------------------------------------------------------ [ 86.857615][ T5837] syz-executor249/5837 is trying to acquire lock: [ 86.857621][ T5837] ffff888041cfbe80 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 86.857659][ T5837] [ 86.857659][ T5837] but task is already holding lock: [ 86.857662][ T5837] ffff888041d49958 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 86.857683][ T5837] [ 86.857683][ T5837] which lock already depends on the new lock. [ 86.857683][ T5837] [ 86.857686][ T5837] [pid 5837] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [ 86.857686][ T5837] the existing dependency chain (in reverse order) is: [ 86.857689][ T5837] [ 86.857689][ T5837] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}: [ 86.857702][ T5837] lock_acquire+0x120/0x360 [ 86.857714][ T5837] down_write+0x3a/0x50 [ 86.857723][ T5837] ocfs2_xattr_set_handle+0x3b0/0x7a0 [ 86.857731][ T5837] ocfs2_init_security_set+0xbd/0xe0 [ 86.857740][ T5837] ocfs2_mknod+0x137f/0x2050 [ 86.857751][ T5837] ocfs2_mkdir+0x191/0x440 [ 86.857761][ T5837] vfs_mkdir+0x306/0x510 [pid 5837] exit_group(0) = ? [pid 5837] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5837, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=24 /* 0.24 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 86.857771][ T5837] do_mkdirat+0x247/0x590 [ 86.857780][ T5837] __x64_sys_mkdirat+0x87/0xa0 [ 86.857789][ T5837] do_syscall_64+0xfa/0x3b0 [ 86.857799][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.857808][ T5837] [ 86.857808][ T5837] -> #3 (jbd2_handle){.+.+}-{0:0}: [ 86.857820][ T5837] lock_acquire+0x120/0x360 [ 86.857830][ T5837] start_this_handle+0x1fa7/0x21c0 [ 86.857841][ T5837] jbd2__journal_start+0x2c1/0x5b0 [ 86.857851][ T5837] jbd2_journal_start+0x2a/0x40 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5841 attached [pid 5841] set_robust_list(0x555568d34760, 24) = 0 [pid 5836] <... clone resumed>, child_tidptr=0x555568d34750) = 5841 [pid 5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5841] setpgid(0, 0) = 0 [pid 5841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "1000", 4) = 4 [pid 5841] close(3) = 0 [pid 5841] write(1, "executing program\n", 18executing program ) = 18 [pid 5841] memfd_create("syzkaller", 0) = 3 [pid 5841] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [ 86.857860][ T5837] ocfs2_start_trans+0x377/0x6d0 [ 86.857873][ T5837] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 86.857886][ T5837] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 86.857898][ T5837] ocfs2_mknod+0xe08/0x2050 [ 86.857909][ T5837] ocfs2_mkdir+0x191/0x440 [ 86.857919][ T5837] vfs_mkdir+0x306/0x510 [ 86.857927][ T5837] do_mkdirat+0x247/0x590 [ 86.857936][ T5837] __x64_sys_mkdirat+0x87/0xa0 [ 86.857946][ T5837] do_syscall_64+0xfa/0x3b0 [ 86.857954][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.857963][ T5837] [ 86.857963][ T5837] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: [ 86.857975][ T5837] lock_acquire+0x120/0x360 [ 86.857985][ T5837] down_read+0x97/0x1f0 [ 86.857993][ T5837] ocfs2_start_trans+0x36b/0x6d0 [ 86.858006][ T5837] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 86.858018][ T5837] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 86.858030][ T5837] ocfs2_mknod+0xe08/0x2050 [ 86.858040][ T5837] ocfs2_mkdir+0x191/0x440 [ 86.858050][ T5837] vfs_mkdir+0x306/0x510 [ 86.858060][ T5837] do_mkdirat+0x247/0x590 [ 86.858069][ T5837] __x64_sys_mkdirat+0x87/0xa0 [ 86.858078][ T5837] do_syscall_64+0xfa/0x3b0 [ 86.858086][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.858095][ T5837] [ 86.858095][ T5837] -> #1 (sb_internal#2){.+.+}-{0:0}: [ 86.858109][ T5837] lock_acquire+0x120/0x360 [ 86.858119][ T5837] ocfs2_start_trans+0x26b/0x6d0 [ 86.858131][ T5837] ocfs2_mknod+0xe93/0x2050 [ 86.858142][ T5837] ocfs2_mkdir+0x191/0x440 [ 86.858152][ T5837] vfs_mkdir+0x306/0x510 [ 86.858161][ T5837] do_mkdirat+0x247/0x590 [ 86.858169][ T5837] __x64_sys_mkdirat+0x87/0xa0 [ 86.858179][ T5837] do_syscall_64+0xfa/0x3b0 [ 86.858200][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.858212][ T5837] [ 86.858212][ T5837] -> #0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: [ 86.858231][ T5837] validate_chain+0xb9b/0x2140 [ 86.858249][ T5837] __lock_acquire+0xab9/0xd20 [ 86.858265][ T5837] lock_acquire+0x120/0x360 [ 86.858280][ T5837] down_write+0x3a/0x50 [ 86.858294][ T5837] ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 86.858310][ T5837] ocfs2_reserve_clusters_with_limit+0x1be/0xba0 [ 86.858330][ T5837] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 86.858343][ T5837] ocfs2_xattr_set+0xb70/0x11f0 [ 86.858357][ T5837] __vfs_setxattr+0x439/0x480 [ 86.858377][ T5837] __vfs_setxattr_noperm+0x12d/0x660 [ 86.858397][ T5837] vfs_setxattr+0x16b/0x2f0 [pid 5841] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5841] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 86.858413][ T5837] ovl_get_workdir+0xc09/0x17c0 [ 86.858427][ T5837] ovl_fill_super+0x1365/0x35b0 [ 86.858440][ T5837] get_tree_nodev+0xbb/0x150 [ 86.858569][ T5837] vfs_get_tree+0x92/0x2b0 [ 86.858591][ T5837] do_new_mount+0x2a2/0x9e0 [ 86.858603][ T5837] __se_sys_mount+0x317/0x410 [ 86.858614][ T5837] do_syscall_64+0xfa/0x3b0 [ 86.858623][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.858633][ T5837] [ 86.858633][ T5837] other info that might help us debug this: [ 86.858633][ T5837] [ 86.858636][ T5837] Chain exists of: [ 86.858636][ T5837] &ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE] --> jbd2_handle --> &oi->ip_xattr_sem [ 86.858636][ T5837] [ 86.858654][ T5837] Possible unsafe locking scenario: [ 86.858654][ T5837] [ 86.858657][ T5837] CPU0 CPU1 [ 86.858660][ T5837] ---- ---- [ 86.858663][ T5837] lock(&oi->ip_xattr_sem); [ 86.858670][ T5837] lock(jbd2_handle); [pid 5841] close(3) = 0 [pid 5841] mkdirat(AT_FDCWD, "./file0", 0700) = 0 [pid 5841] mkdir("./bus", 0777) = 0 [pid 5841] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5841] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [ 86.858676][ T5837] lock(&oi->ip_xattr_sem); [ 86.858683][ T5837] lock(&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]); [ 86.858690][ T5837] [ 86.858690][ T5837] *** DEADLOCK *** [ 86.858690][ T5837] [ 86.858693][ T5837] 4 locks held by syz-executor249/5837: [ 86.858699][ T5837] #0: ffff8880395a40d0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x990 [ 86.858727][ T5837] #1: ffff888010c20488 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [pid 5841] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5841] exit_group(0) = ? [pid 5841] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=0, si_utime=7 /* 0.07 s */, si_stime=21 /* 0.21 s */} --- [ 86.858751][ T5837] #2: ffff888041d49c80 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0 [ 86.858778][ T5837] #3: ffff888041d49958 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 86.858800][ T5837] [ 86.858800][ T5837] stack backtrace: [ 86.858818][ T5837] CPU: 1 UID: 0 PID: 5837 Comm: syz-executor249 Tainted: G W 6.16.0-syzkaller-11743-g6bcdbd62bd56 #0 PREEMPT_{RT,(full)} [ 86.858833][ T5837] Tainted: [W]=WARN [ 86.858836][ T5837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5842 attached [ 86.858843][ T5837] Call Trace: [ 86.858849][ T5837] [ 86.858853][ T5837] dump_stack_lvl+0x189/0x250 [ 86.858869][ T5837] ? __pfx_dump_stack_lvl+0x10/0x10 [ 86.858882][ T5837] ? __pfx__printk+0x10/0x10 [ 86.858893][ T5837] ? print_lock_name+0xde/0x100 [ 86.858903][ T5837] print_circular_bug+0x2ee/0x310 [ 86.858919][ T5837] check_noncircular+0x134/0x160 [ 86.858934][ T5837] validate_chain+0xb9b/0x2140 [ 86.858948][ T5837] ? rt_mutex_slowunlock+0x1be/0x2e0 [ 86.858965][ T5837] __lock_acquire+0xab9/0xd20 [pid 5842] set_robust_list(0x555568d34760, 24 [pid 5836] <... clone resumed>, child_tidptr=0x555568d34750) = 5842 [pid 5842] <... set_robust_list resumed>) = 0 [pid 5842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5842] setpgid(0, 0) = 0 [pid 5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5842] write(3, "1000", 4) = 4 [pid 5842] close(3) = 0 executing program [pid 5842] write(1, "executing program\n", 18) = 18 [pid 5842] memfd_create("syzkaller", 0) = 3 [pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [ 86.858978][ T5837] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 86.858990][ T5837] lock_acquire+0x120/0x360 [ 86.859001][ T5837] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 86.859014][ T5837] ? try_to_take_rt_mutex+0x840/0xb00 [ 86.859029][ T5837] down_write+0x3a/0x50 [ 86.859039][ T5837] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 86.859050][ T5837] ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 86.859062][ T5837] ? rtlock_slowlock_locked+0xd8/0x4010 [ 86.859076][ T5837] ? __lock_acquire+0xab9/0xd20 [ 86.859089][ T5837] ? do_raw_spin_lock+0x121/0x290 [ 86.859099][ T5837] ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10 [ 86.859112][ T5837] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 86.859121][ T5837] ? lockdep_hardirqs_on+0x9c/0x150 [ 86.859131][ T5837] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 86.859140][ T5837] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 86.859152][ T5837] ? rt_mutex_slowunlock+0x493/0x8a0 [ 86.859164][ T5837] ? reacquire_held_locks+0x127/0x1d0 [ 86.859177][ T5837] ? __pfx_migrate_enable+0x10/0x10 [ 86.859189][ T5837] ? __pfx_rt_mutex_slowunlock+0x10/0x10 [ 86.859222][ T5837] ? ocfs2_alloc_should_use_local+0x152/0x310 [ 86.859233][ T5837] ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0 [ 86.859247][ T5837] ocfs2_reserve_clusters_with_limit+0x1be/0xba0 [ 86.859263][ T5837] ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10 [ 86.859277][ T5837] ? do_raw_spin_lock+0x121/0x290 [ 86.859288][ T5837] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10 [ 86.859300][ T5837] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 86.859310][ T5837] ? lockdep_hardirqs_on+0x9c/0x150 [ 86.859320][ T5837] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 86.859331][ T5837] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 86.859342][ T5837] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10 [ 86.859351][ T5837] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 86.859361][ T5837] ? __pfx_rt_mutex_slowunlock+0x10/0x10 [ 86.859372][ T5837] ? ocfs2_xattr_set+0xb36/0x11f0 [ 86.859382][ T5837] ocfs2_xattr_set+0xb70/0x11f0 [ 86.859399][ T5837] ? __pfx_ocfs2_xattr_set+0x10/0x10 [ 86.859408][ T5837] ? vprintk_store+0xafe/0xd10 [ 86.859425][ T5837] ? validate_chain+0x897/0x2140 [ 86.859439][ T5837] ? smack_log+0xef/0x3f0 [ 86.859452][ T5837] ? smk_access+0x14c/0x4e0 [ 86.859464][ T5837] ? smk_tskacc+0x2fc/0x370 [ 86.859477][ T5837] ? posix_xattr_acl+0x93/0xc0 [ 86.859489][ T5837] ? evm_protect_xattr+0x4d4/0xa90 [ 86.859500][ T5837] ? __pfx_evm_protect_xattr+0x10/0x10 [ 86.859509][ T5837] ? safesetid_security_capable+0xa9/0x1a0 [ 86.859525][ T5837] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10 [ 86.859534][ T5837] __vfs_setxattr+0x439/0x480 [pid 5842] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5842] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 86.859549][ T5837] __vfs_setxattr_noperm+0x12d/0x660 [ 86.859562][ T5837] vfs_setxattr+0x16b/0x2f0 [ 86.859576][ T5837] ? __pfx_vfs_setxattr+0x10/0x10 [ 86.859587][ T5837] ? dput+0x37/0x2b0 [ 86.859600][ T5837] ? dput+0x37/0x2b0 [ 86.859613][ T5837] ovl_get_workdir+0xc09/0x17c0 [ 86.859625][ T5837] ? __pfx_ovl_get_workdir+0x10/0x10 [ 86.859636][ T5837] ? __lock_acquire+0xab9/0xd20 [ 86.859651][ T5837] ? rt_spin_unlock+0x65/0x80 [ 86.859664][ T5837] ? ovl_inuse_trylock+0xae/0xf0 [ 86.859674][ T5837] ovl_fill_super+0x1365/0x35b0 [ 86.859684][ T5837] ? do_raw_spin_lock+0x121/0x290 [ 86.859696][ T5837] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 86.859706][ T5837] ? lockdep_hardirqs_on+0x9c/0x150 [ 86.859716][ T5837] ? __pfx_ovl_fill_super+0x10/0x10 [ 86.859725][ T5837] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 86.859735][ T5837] ? lockdep_hardirqs_on+0x9c/0x150 [ 86.859745][ T5837] ? rt_mutex_slowunlock+0x1be/0x2e0 [ 86.859758][ T5837] ? __raw_spin_lock_init+0x45/0x100 [ 86.859771][ T5837] ? sget_fc+0x962/0xa40 [pid 5842] close(3) = 0 [pid 5842] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5842] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5842] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5842] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [ 86.859781][ T5837] ? __pfx_set_anon_super_fc+0x10/0x10 [ 86.859791][ T5837] ? __pfx_ovl_fill_super+0x10/0x10 [ 86.859800][ T5837] get_tree_nodev+0xbb/0x150 [ 86.859811][ T5837] vfs_get_tree+0x92/0x2b0 [ 86.859823][ T5837] do_new_mount+0x2a2/0x9e0 [ 86.859836][ T5837] ? ns_capable+0x8a/0xf0 [ 86.859847][ T5837] ? __pfx_do_new_mount+0x10/0x10 [ 86.859859][ T5837] ? path_mount+0x61c/0xfe0 [ 86.859872][ T5837] __se_sys_mount+0x317/0x410 [ 86.859886][ T5837] ? __pfx___se_sys_mount+0x10/0x10 [pid 5842] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5842] exit_group(0) = ? [pid 5842] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5842, si_uid=0, si_status=0, si_utime=8 /* 0.08 s */, si_stime=18 /* 0.18 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5843 attached [pid 5843] set_robust_list(0x555568d34760, 24) = 0 [pid 5843] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5843] setpgid(0, 0 [pid 5836] <... clone resumed>, child_tidptr=0x555568d34750) = 5843 [pid 5843] <... setpgid resumed>) = 0 [ 86.859898][ T5837] ? rcu_is_watching+0x15/0xb0 [ 86.859913][ T5837] ? __x64_sys_mount+0x20/0xc0 [ 86.859926][ T5837] do_syscall_64+0xfa/0x3b0 [ 86.859936][ T5837] ? lockdep_hardirqs_on+0x9c/0x150 [ 86.859944][ T5837] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.859954][ T5837] ? clear_bhb_loop+0x60/0xb0 [ 86.859965][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.859975][ T5837] RIP: 0033:0x7f778393c699 [pid 5843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5843] write(3, "1000", 4) = 4 [pid 5843] close(3) = 0 [pid 5843] write(1, "executing program\n", 18executing program ) = 18 [pid 5843] memfd_create("syzkaller", 0) = 3 [pid 5843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [ 86.859990][ T5837] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 [ 86.859998][ T5837] RSP: 002b:00007fff3b341bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 86.860010][ T5837] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f778393c699 [ 86.860017][ T5837] RDX: 0000200000000b80 RSI: 0000200000000000 RDI: 0000000000000000 [ 86.860023][ T5837] RBP: 0000000000000000 R08: 0000200000000140 R09: 00007fff3b341bf0 [ 86.860030][ T5837] R10: 0000000000200008 R11: 0000000000000246 R12: 00007fff3b341bf0 [ 86.860036][ T5837] R13: 00007fff3b341e78 R14: 431bde82d7b634db R15: 00007f778398503b [ 86.860047][ T5837] [ 86.880325][ T5837] overlayfs: upper fs missing required features. [ 86.881023][ T991] cfg80211: failed to load regulatory.db [ 87.455444][ T5841] overlayfs: workdir and upperdir must reside under the same mount [ 87.937874][ T5842] overlayfs: workdir and upperdir must reside under the same mount [pid 5843] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5843] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5843] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5843] close(3) = 0 [pid 5843] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5843] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5843] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5843] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5843] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5843] exit_group(0) = ? [pid 5843] +++ exited with 0 +++ [ 88.262036][ T5843] overlayfs: workdir and upperdir must reside under the same mount --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5843, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=11 /* 0.11 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5844 attached , child_tidptr=0x555568d34750) = 5844 [pid 5844] set_robust_list(0x555568d34760, 24) = 0 [pid 5844] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5844] setpgid(0, 0) = 0 [pid 5844] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5844] write(3, "1000", 4) = 4 [pid 5844] close(3) = 0 [pid 5844] write(1, "executing program\n", 18executing program ) = 18 [pid 5844] memfd_create("syzkaller", 0) = 3 [pid 5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5844] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5844] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5844] close(3) = 0 [pid 5844] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5844] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5844] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5844] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5844] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5844] exit_group(0) = ? [pid 5844] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5844, si_uid=0, si_status=0, si_utime=5 /* 0.05 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5845 attached , child_tidptr=0x555568d34750) = 5845 [ 88.639696][ T5844] overlayfs: workdir and upperdir must reside under the same mount [pid 5845] set_robust_list(0x555568d34760, 24) = 0 [pid 5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5845] setpgid(0, 0) = 0 [pid 5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5845] write(3, "1000", 4) = 4 [pid 5845] close(3) = 0 executing program [pid 5845] write(1, "executing program\n", 18) = 18 [pid 5845] memfd_create("syzkaller", 0) = 3 [pid 5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5845] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5845] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5845] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5845] close(3) = 0 [pid 5845] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5845] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5845] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5845] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5845] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5845] exit_group(0) = ? [pid 5845] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5845, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5846 attached [pid 5846] set_robust_list(0x555568d34760, 24 [pid 5836] <... clone resumed>, child_tidptr=0x555568d34750) = 5846 [pid 5846] <... set_robust_list resumed>) = 0 [pid 5846] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 88.988655][ T5845] overlayfs: workdir and upperdir must reside under the same mount [pid 5846] setpgid(0, 0) = 0 [pid 5846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5846] write(3, "1000", 4) = 4 [pid 5846] close(3) = 0 executing program [pid 5846] write(1, "executing program\n", 18) = 18 [pid 5846] memfd_create("syzkaller", 0) = 3 [pid 5846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5846] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5846] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5846] close(3) = 0 [pid 5846] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5846] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5846] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5846] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5846] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5846] exit_group(0) = ? [pid 5846] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5846, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 [ 89.308321][ T5846] overlayfs: workdir and upperdir must reside under the same mount openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5847 attached , child_tidptr=0x555568d34750) = 5847 [pid 5847] set_robust_list(0x555568d34760, 24) = 0 [pid 5847] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5847] setpgid(0, 0) = 0 [pid 5847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "1000", 4) = 4 [pid 5847] close(3) = 0 [pid 5847] write(1, "executing program\n", 18executing program ) = 18 [pid 5847] memfd_create("syzkaller", 0) = 3 [pid 5847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5847] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5847] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5847] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5847] close(3) = 0 [pid 5847] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5847] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5847] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5847] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5847] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5847] exit_group(0) = ? [pid 5847] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5847, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- [ 89.676598][ T5847] overlayfs: workdir and upperdir must reside under the same mount openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5848 attached , child_tidptr=0x555568d34750) = 5848 [pid 5848] set_robust_list(0x555568d34760, 24) = 0 [pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5848] setpgid(0, 0) = 0 [pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5848] write(3, "1000", 4) = 4 [pid 5848] close(3) = 0 executing program [pid 5848] write(1, "executing program\n", 18) = 18 [pid 5848] memfd_create("syzkaller", 0) = 3 [pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5848] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5848] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5848] close(3) = 0 [pid 5848] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5848] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5848] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5848] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5848] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5848] exit_group(0) = ? [pid 5848] +++ exited with 0 +++ [ 90.054923][ T5848] overlayfs: workdir and upperdir must reside under the same mount --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5848, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5852 attached , child_tidptr=0x555568d34750) = 5852 [pid 5852] set_robust_list(0x555568d34760, 24) = 0 [pid 5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5852] setpgid(0, 0) = 0 [pid 5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5852] write(3, "1000", 4) = 4 [pid 5852] close(3) = 0 executing program [pid 5852] write(1, "executing program\n", 18) = 18 [pid 5852] memfd_create("syzkaller", 0) = 3 [pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5852] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5852] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5852] close(3) = 0 [pid 5852] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5852] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5852] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5852] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5852] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5852] exit_group(0) = ? [pid 5852] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5852, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 90.413249][ T5852] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5853 attached [pid 5853] set_robust_list(0x555568d34760, 24 [pid 5836] <... clone resumed>, child_tidptr=0x555568d34750) = 5853 [pid 5853] <... set_robust_list resumed>) = 0 [pid 5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5853] setpgid(0, 0) = 0 [pid 5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5853] write(3, "1000", 4) = 4 [pid 5853] close(3) = 0 executing program [pid 5853] write(1, "executing program\n", 18) = 18 [pid 5853] memfd_create("syzkaller", 0) = 3 [pid 5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5853] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5853] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5853] close(3) = 0 [pid 5853] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5853] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5853] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5853] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5853] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5853] exit_group(0) = ? [pid 5853] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5853, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 90.732564][ T5853] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5855 attached , child_tidptr=0x555568d34750) = 5855 [pid 5855] set_robust_list(0x555568d34760, 24) = 0 [pid 5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5855] setpgid(0, 0) = 0 [pid 5855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5855] write(3, "1000", 4) = 4 [pid 5855] close(3) = 0 executing program [pid 5855] write(1, "executing program\n", 18) = 18 [pid 5855] memfd_create("syzkaller", 0) = 3 [pid 5855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5855] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5855] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5855] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5855] close(3) = 0 [pid 5855] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5855] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5855] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5855] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5855] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5855] exit_group(0) = ? [pid 5855] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5855, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} --- [ 91.104185][ T5855] overlayfs: workdir and upperdir must reside under the same mount openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5857 attached , child_tidptr=0x555568d34750) = 5857 [pid 5857] set_robust_list(0x555568d34760, 24) = 0 [pid 5857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5857] setpgid(0, 0) = 0 [pid 5857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5857] write(3, "1000", 4) = 4 [pid 5857] close(3) = 0 [pid 5857] write(1, "executing program\n", 18executing program ) = 18 [pid 5857] memfd_create("syzkaller", 0) = 3 [pid 5857] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5857] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5857] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5857] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5857] close(3) = 0 [pid 5857] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5857] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5857] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5857] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5857] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5857] exit_group(0) = ? [pid 5857] +++ exited with 0 +++ [ 91.442043][ T5857] overlayfs: workdir and upperdir must reside under the same mount --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5857, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=12 /* 0.12 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5859 attached , child_tidptr=0x555568d34750) = 5859 [pid 5859] set_robust_list(0x555568d34760, 24) = 0 [pid 5859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5859] setpgid(0, 0) = 0 [pid 5859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "1000", 4) = 4 [pid 5859] close(3) = 0 [pid 5859] write(1, "executing program\n", 18executing program ) = 18 [pid 5859] memfd_create("syzkaller", 0) = 3 [pid 5859] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5859] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5859] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5859] close(3) = 0 [pid 5859] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5859] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5859] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5859] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5859] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5859] exit_group(0) = ? [pid 5859] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5859, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 91.842377][ T5859] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5860 attached , child_tidptr=0x555568d34750) = 5860 [pid 5860] set_robust_list(0x555568d34760, 24) = 0 [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5860] setpgid(0, 0) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5860] write(3, "1000", 4) = 4 [pid 5860] close(3) = 0 [pid 5860] write(1, "executing program\n", 18executing program ) = 18 [pid 5860] memfd_create("syzkaller", 0) = 3 [pid 5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5860] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5860] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5860] close(3) = 0 [pid 5860] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5860] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5860] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5860] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5860] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5860] exit_group(0) = ? [pid 5860] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5860, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=10 /* 0.10 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 92.185507][ T5860] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5862 attached , child_tidptr=0x555568d34750) = 5862 [pid 5862] set_robust_list(0x555568d34760, 24) = 0 [pid 5862] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5862] setpgid(0, 0) = 0 [pid 5862] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5862] write(3, "1000", 4) = 4 [pid 5862] close(3) = 0 [pid 5862] write(1, "executing program\n", 18executing program ) = 18 [pid 5862] memfd_create("syzkaller", 0) = 3 [pid 5862] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5862] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5862] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5862] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5862] close(3) = 0 [pid 5862] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5862] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5862] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5862] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5862] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5862] exit_group(0) = ? [pid 5862] +++ exited with 0 +++ [ 92.515726][ T5862] overlayfs: workdir and upperdir must reside under the same mount --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5862, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5863 attached , child_tidptr=0x555568d34750) = 5863 [pid 5863] set_robust_list(0x555568d34760, 24) = 0 [pid 5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5863] setpgid(0, 0) = 0 [pid 5863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5863] write(3, "1000", 4) = 4 [pid 5863] close(3) = 0 executing program [pid 5863] write(1, "executing program\n", 18) = 18 [pid 5863] memfd_create("syzkaller", 0) = 3 [pid 5863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5863] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5863] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5863] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5863] close(3) = 0 [pid 5863] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5863] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5863] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5863] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5863] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5863] exit_group(0) = ? [pid 5863] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5863, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 92.895563][ T5863] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5864 attached , child_tidptr=0x555568d34750) = 5864 [pid 5864] set_robust_list(0x555568d34760, 24) = 0 [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5864] setpgid(0, 0) = 0 [pid 5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1000", 4) = 4 [pid 5864] close(3) = 0 [pid 5864] write(1, "executing program\n", 18executing program ) = 18 [pid 5864] memfd_create("syzkaller", 0) = 3 [pid 5864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5864] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5864] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5864] close(3) = 0 [pid 5864] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5864] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5864] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5864] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5864] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5864] exit_group(0) = ? [pid 5864] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5864, si_uid=0, si_status=0, si_utime=5 /* 0.05 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 [ 93.235046][ T5864] overlayfs: workdir and upperdir must reside under the same mount openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5866 attached , child_tidptr=0x555568d34750) = 5866 [pid 5866] set_robust_list(0x555568d34760, 24) = 0 [pid 5866] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5866] setpgid(0, 0) = 0 [pid 5866] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5866] write(3, "1000", 4) = 4 [pid 5866] close(3) = 0 executing program [pid 5866] write(1, "executing program\n", 18) = 18 [pid 5866] memfd_create("syzkaller", 0) = 3 [pid 5866] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5866] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5866] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5866] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5866] close(3) = 0 [pid 5866] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5866] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5866] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5866] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5866] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5866] exit_group(0) = ? [pid 5866] +++ exited with 0 +++ [ 93.540892][ T5866] overlayfs: workdir and upperdir must reside under the same mount --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5866, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5867 attached , child_tidptr=0x555568d34750) = 5867 [pid 5867] set_robust_list(0x555568d34760, 24) = 0 [pid 5867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5867] setpgid(0, 0) = 0 [pid 5867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "1000", 4) = 4 [pid 5867] close(3) = 0 executing program [pid 5867] write(1, "executing program\n", 18) = 18 [pid 5867] memfd_create("syzkaller", 0) = 3 [pid 5867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5867] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5867] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5867] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5867] close(3) = 0 [pid 5867] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5867] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5867] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5867] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5867] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5867] exit_group(0) = ? [pid 5867] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5867, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 93.915849][ T5867] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5868 attached , child_tidptr=0x555568d34750) = 5868 [pid 5868] set_robust_list(0x555568d34760, 24) = 0 [pid 5868] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5868] setpgid(0, 0) = 0 [pid 5868] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5868] write(3, "1000", 4) = 4 [pid 5868] close(3) = 0 executing program [pid 5868] write(1, "executing program\n", 18) = 18 [pid 5868] memfd_create("syzkaller", 0) = 3 [pid 5868] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5868] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5868] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5868] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5868] close(3) = 0 [pid 5868] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5868] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5868] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5868] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5868] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5868] exit_group(0) = ? [pid 5868] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5868, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 94.260646][ T5868] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5869 attached , child_tidptr=0x555568d34750) = 5869 [pid 5869] set_robust_list(0x555568d34760, 24) = 0 [pid 5869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5869] setpgid(0, 0) = 0 [pid 5869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5869] write(3, "1000", 4) = 4 [pid 5869] close(3) = 0 executing program [pid 5869] write(1, "executing program\n", 18) = 18 [pid 5869] memfd_create("syzkaller", 0) = 3 [pid 5869] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5869] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5869] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5869] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5869] close(3) = 0 [pid 5869] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5869] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5869] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5869] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5869] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5869] exit_group(0) = ? [pid 5869] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5869, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5870 attached [ 94.613566][ T5869] overlayfs: workdir and upperdir must reside under the same mount , child_tidptr=0x555568d34750) = 5870 [pid 5870] set_robust_list(0x555568d34760, 24) = 0 [pid 5870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5870] setpgid(0, 0) = 0 [pid 5870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5870] write(3, "1000", 4) = 4 [pid 5870] close(3) = 0 executing program [pid 5870] write(1, "executing program\n", 18) = 18 [pid 5870] memfd_create("syzkaller", 0) = 3 [pid 5870] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5870] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5870] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5870] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5870] close(3) = 0 [pid 5870] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5870] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5870] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5870] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5870] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5870] exit_group(0) = ? [pid 5870] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5870, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=12 /* 0.12 s */} --- [ 94.953502][ T5870] overlayfs: workdir and upperdir must reside under the same mount restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5871 attached , child_tidptr=0x555568d34750) = 5871 [pid 5871] set_robust_list(0x555568d34760, 24) = 0 [pid 5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5871] setpgid(0, 0) = 0 [pid 5871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5871] write(3, "1000", 4) = 4 [pid 5871] close(3executing program ) = 0 [pid 5871] write(1, "executing program\n", 18) = 18 [pid 5871] memfd_create("syzkaller", 0) = 3 [pid 5871] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5871] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5871] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5871] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5871] close(3) = 0 [pid 5871] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5871] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5871] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5871] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5871] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5871] exit_group(0) = ? [pid 5871] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5871, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 [ 95.280972][ T5871] overlayfs: workdir and upperdir must reside under the same mount openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5872 attached , child_tidptr=0x555568d34750) = 5872 [pid 5872] set_robust_list(0x555568d34760, 24) = 0 [pid 5872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5872] setpgid(0, 0) = 0 [pid 5872] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5872] write(3, "1000", 4) = 4 [pid 5872] close(3) = 0 executing program [pid 5872] write(1, "executing program\n", 18) = 18 [pid 5872] memfd_create("syzkaller", 0) = 3 [pid 5872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5872] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5872] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5872] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5872] close(3) = 0 [pid 5872] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5872] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5872] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5872] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5872] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5872] exit_group(0) = ? [ 95.660648][ T5872] overlayfs: workdir and upperdir must reside under the same mount [pid 5872] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5872, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5873 attached , child_tidptr=0x555568d34750) = 5873 [pid 5873] set_robust_list(0x555568d34760, 24) = 0 [pid 5873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5873] setpgid(0, 0) = 0 [pid 5873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5873] write(3, "1000", 4) = 4 [pid 5873] close(3) = 0 [pid 5873] write(1, "executing program\n", 18executing program ) = 18 [pid 5873] memfd_create("syzkaller", 0) = 3 [pid 5873] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5873] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5873] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5873] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5873] close(3) = 0 [pid 5873] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5873] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5873] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5873] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5873] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5873] exit_group(0) = ? [pid 5873] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5873, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5874 attached [ 96.040088][ T5873] overlayfs: workdir and upperdir must reside under the same mount , child_tidptr=0x555568d34750) = 5874 [pid 5874] set_robust_list(0x555568d34760, 24) = 0 [pid 5874] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5874] setpgid(0, 0) = 0 [pid 5874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5874] write(3, "1000", 4) = 4 [pid 5874] close(3) = 0 executing program [pid 5874] write(1, "executing program\n", 18) = 18 [pid 5874] memfd_create("syzkaller", 0) = 3 [pid 5874] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5874] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5874] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5874] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5874] close(3) = 0 [pid 5874] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5874] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5874] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5874] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5874] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5874] exit_group(0) = ? [ 96.381494][ T5874] overlayfs: workdir and upperdir must reside under the same mount [pid 5874] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5874, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5876 attached [pid 5876] set_robust_list(0x555568d34760, 24) = 0 [pid 5876] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5836] <... clone resumed>, child_tidptr=0x555568d34750) = 5876 [pid 5876] <... prctl resumed>) = 0 [pid 5876] setpgid(0, 0) = 0 [pid 5876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5876] write(3, "1000", 4) = 4 [pid 5876] close(3) = 0 [pid 5876] write(1, "executing program\n", 18executing program ) = 18 [pid 5876] memfd_create("syzkaller", 0) = 3 [pid 5876] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000 [pid 5876] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5876] munmap(0x7f777b4f5000, 138412032) = 0 [pid 5876] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5876] close(3) = 0 [pid 5876] mkdirat(AT_FDCWD, "./file0", 0700) = -1 EEXIST (File exists) [pid 5876] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5876] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5876] mkdirat(AT_FDCWD, "./file1", 0700) = -1 EEXIST (File exists) [pid 5876] mount(NULL, "./bus", "overlay", MS_NOEXEC|MS_RELATIME, "workdir=./bus,lowerdir=./file0,upperdir=./file1,nfs_export=on,") = -1 EINVAL (Invalid argument) [pid 5876] exit_group(0) = ? [pid 5876] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5876, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5877 attached [ 96.754864][ T5876] overlayfs: workdir and upperdir must reside under the same mount , child_tidptr=0x555568d34750) = 5877 [pid 5877] set_robust_list(0x555568d34760, 24) = 0 [pid 5877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5877] setpgid(0, 0) = 0 [pid 5877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5877] write(3, "1000", 4) = 4 [pid 5877] close(3) = 0 executing program [pid 5877] write(1, "executing program\n", 18) = 18 [pid 5877] memfd_create("syzkaller", 0) = 3 [pid 5877] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f777b4f5000