./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3528639767 <...> Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. execve("./syz-executor3528639767", ["./syz-executor3528639767"], 0x7ffe0b476bb0 /* 10 vars */) = 0 brk(NULL) = 0x555556a93000 brk(0x555556a93c40) = 0x555556a93c40 arch_prctl(ARCH_SET_FS, 0x555556a93300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3528639767", 4096) = 28 brk(0x555556ab4c40) = 0x555556ab4c40 brk(0x555556ab5000) = 0x555556ab5000 mprotect(0x7f127ce17000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556a935d0) = 3605 ./strace-static-x86_64: Process 3605 attached [pid 3605] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3605] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3605] setsid() = 1 [pid 3605] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3605] unshare(CLONE_NEWNS) = 0 [pid 3605] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3605] unshare(CLONE_NEWIPC) = 0 [pid 3605] unshare(CLONE_NEWCGROUP) = 0 [pid 3605] unshare(CLONE_NEWUTS) = 0 [pid 3605] unshare(CLONE_SYSVSEM) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "16777216", 8) = 8 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "536870912", 9) = 9 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "8192", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3605] close(3) = 0 [pid 3605] getpid() = 1 [pid 3605] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b cc cc cc cc cc cc cc cc cc cc cc 55 41 57 41 56 41 55 41 54 [ 39.209407][ T56] RSP: 0018:ffffc90001577b68 EFLAGS: 00010293 [ 39.215453][ T56] RAX: ffffffff81fe1253 RBX: ffff888075d2b080 RCX: ffff888018d40000 [ 39.223402][ T56] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888075d2b000 [ 39.231350][ T56] RBP: ffffc90001577c30 R08: dffffc0000000000 R09: fffffbfff2325fe4 [ 39.239301][ T56] R10: fffffbfff2325fe4 R11: 1ffffffff2325fe3 R12: ffff888145e77800 [ 39.247249][ T56] R13: ffffc90001577bc0 R14: ffff888075d2b000 R15: ffff888075d2b000 [ 39.255198][ T56] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 39.264105][ T56] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.270673][ T56] CR2: 00007f127cdcaa38 CR3: 000000001dd46000 CR4: 00000000003506f0 [ 39.278632][ T56] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.286587][ T56] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.294541][ T56] Call Trace: [ 39.297809][ T56] [ 39.300726][ T56] fsnotify_mark_destroy_workfn+0x2cc/0x340 [ 39.306613][ T56] ? fsnotify_connector_destroy_workfn+0xa0/0xa0 [ 39.312927][ T56] ? read_word_at_a_time+0xe/0x20 [ 39.317942][ T56] process_one_work+0x877/0xdb0 [ 39.322786][ T56] ? worker_detach_from_pool+0x260/0x260 [ 39.328413][ T56] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 39.334377][ T56] ? _raw_spin_lock_irq+0xba/0xf0 [ 39.339384][ T56] ? _raw_spin_lock_irqsave+0x100/0x100 [ 39.344917][ T56] worker_thread+0xb14/0x1330 [ 39.349585][ T56] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 39.355470][ T56] kthread+0x266/0x300 [ 39.359525][ T56] ? rcu_lock_release+0x20/0x20 [ 39.364360][ T56] ? kthread_blkcg+0xd0/0xd0 [ 39.368936][ T56] ret_from_fork+0x1f/0x30 [ 39.373343][ T56] [ 39.376347][ T56] Modules linked in: [ 39.383228][ T56] ---[ end trace 0000000000000000 ]--- [ 39.388697][ T56] RIP: 0010:dnotify_free_mark+0x53/0x60 [ 39.394561][ T56] Code: 48 89 df e8 ff b3 dd ff 48 83 3b 00 75 17 e8 e4 bc 89 ff 48 8b 3d 4d ce 0f 0c 4c 89 f6 5b 41 5e e9 a2 de dc ff e8 cd bc 89 ff <0f> 0b cc cc cc cc cc cc cc cc cc cc cc 55 41 57 41 56 41 55 41 54 [ 39.414221][ T56] RSP: 0018:ffffc90001577b68 EFLAGS: 00010293 [ 39.420299][ T56] RAX: ffffffff81fe1253 RBX: ffff888075d2b080 RCX: ffff888018d40000 [ 39.428349][ T56] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888075d2b000 [pid 3605] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3605, si_uid=0, si_status=1, si_utime=0, si_stime=6} --- exit_group(0) = ? +++ exited with 0 +++ [ 39.436421][ T56] RBP: ffffc90001577c30 R08: dffffc0000000000 R09