./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3523680998 <...> DUID 00:04:f8:32:f0:25:6b:f7:7b:d6:d2:5e:34:7f:1d:07:e3:4e forked to background, child pid 4659 [ 29.769606][ T4660] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.785286][ T4660] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. execve("./syz-executor3523680998", ["./syz-executor3523680998"], 0x7ffd430b6140 /* 10 vars */) = 0 brk(NULL) = 0x555556d6e000 brk(0x555556d6ec40) = 0x555556d6ec40 arch_prctl(ARCH_SET_FS, 0x555556d6e300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3523680998", 4096) = 28 brk(0x555556d8fc40) = 0x555556d8fc40 brk(0x555556d90000) = 0x555556d90000 mprotect(0x7ff5961d2000, 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 getpid() = 4990 openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 write(3, "10000000000", 11) = 11 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 write(3, "20", 2) = 2 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 write(3, "100", 3) = 3 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 write(3, "7 4 1 3", 7) = 7 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 write(3, "4990", 4) = 4 close(3) = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 4991 attached , child_tidptr=0x555556d6e5d0) = 4991 [pid 4991] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 4991] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4991] setsid() = 1 [pid 4991] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 4991] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 4991] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 4991] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 4991] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 4991] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 4991] unshare(CLONE_NEWNS) = 0 [pid 4991] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 4991] unshare(CLONE_NEWIPC) = 0 [pid 4991] unshare(CLONE_NEWCGROUP) = 0 [pid 4991] unshare(CLONE_NEWUTS) = 0 [pid 4991] unshare(CLONE_SYSVSEM) = 0 [pid 4991] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4991] write(3, "16777216", 8) = 8 [pid 4991] close(3) = 0 [pid 4991] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 4991] write(3, "536870912", 9) = 9 [pid 4991] close(3) = 0 [pid 4991] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4991] write(3, "1024", 4) = 4 [pid 4991] close(3) = 0 [pid 4991] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4991] write(3, "8192", 4) = 4 [pid 4991] close(3) = 0 [pid 4991] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4991] write(3, "1024", 4) = 4 [pid 4991] close(3) = 0 [pid 4991] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 4991] write(3, "1024", 4) = 4 [pid 4991] close(3) = 0 [pid 4991] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 4991] write(3, "1024 1048576 500 1024", 21) = 21 [pid 4991] close(3) = 0 [pid 4991] getpid() = 1 [pid 4991] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b 0f 1f 80 00 00 00 00 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 [ 59.792400][ T56] RSP: 0018:ffffc90001577b88 EFLAGS: 00010293 [ 59.798470][ T56] RAX: ffffffff82061cc7 RBX: ffff88802bb1b080 RCX: ffff888018a81dc0 [ 59.806429][ T56] RDX: 0000000000000000 RSI: 0000000000000017 RDI: ffff88802bb1b000 [ 59.814387][ T56] RBP: ffffc90001577c50 R08: ffffffff82058c2f R09: ffffed100fd76402 [ 59.822344][ T56] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888015af2800 [ 59.830299][ T56] R13: ffffc90001577be0 R14: ffff88802bb1b000 R15: ffff88802bb1b000 [ 59.838255][ T56] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 59.847179][ T56] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.853752][ T56] CR2: 0000563eeac54010 CR3: 000000002c74d000 CR4: 00000000003506e0 [ 59.861711][ T56] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.869667][ T56] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.877623][ T56] Call Trace: [ 59.880886][ T56] [ 59.883802][ T56] ? __die_body+0x5e/0xa0 [ 59.888120][ T56] ? die+0x87/0xb0 [ 59.891827][ T56] ? do_trap+0x11e/0x350 [ 59.896056][ T56] ? dnotify_free_mark+0x57/0x60 [ 59.900984][ T56] ? dnotify_free_mark+0x57/0x60 [ 59.905910][ T56] ? do_error_trap+0x141/0x1f0 [ 59.910662][ T56] ? dnotify_free_mark+0x57/0x60 [ 59.915588][ T56] ? do_int3+0x30/0x30 [ 59.919652][ T56] ? report_bug+0x3e4/0x500 [ 59.924163][ T56] ? handle_invalid_op+0x2c/0x40 [ 59.929085][ T56] ? dnotify_free_mark+0x57/0x60 [ 59.934011][ T56] ? exc_invalid_op+0x33/0x50 [ 59.938670][ T56] ? asm_exc_invalid_op+0x1a/0x20 [ 59.943682][ T56] ? fsnotify_put_group+0x9f/0x370 [ 59.948786][ T56] ? dnotify_free_mark+0x57/0x60 [ 59.953711][ T56] ? dnotify_free_mark+0x57/0x60 [ 59.958637][ T56] ? dnotify_free_mark+0x57/0x60 [ 59.963562][ T56] fsnotify_mark_destroy_workfn+0x2cb/0x340 [ 59.969445][ T56] ? fsnotify_connector_destroy_workfn+0xa0/0xa0 [ 59.975763][ T56] process_one_work+0x8a0/0x10e0 [ 59.980716][ T56] ? worker_detach_from_pool+0x290/0x290 [ 59.986353][ T56] ? _raw_spin_lock_irqsave+0x120/0x120 [ 59.991883][ T56] ? kthread_data+0x52/0xc0 [ 59.996373][ T56] ? wq_worker_running+0x9b/0x1a0 [ 60.001387][ T56] worker_thread+0xa63/0x1210 [ 60.006053][ T56] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 60.011940][ T56] ? _raw_spin_unlock+0x40/0x40 [ 60.016778][ T56] kthread+0x2b8/0x350 [ 60.020834][ T56] ? pr_cont_work+0x5e0/0x5e0 [pid 4991] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4991, si_uid=0, si_status=1, si_utime=0, si_stime=90 /* 0.90 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 60.025505][ T56] ? kthread_blkc