./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1521956866 <...> Warning: Permanently added '10.128.0.115' (ECDSA) to the list of known hosts. execve("./syz-executor1521956866", ["./syz-executor1521956866"], 0x7ffd123c6880 /* 10 vars */) = 0 brk(NULL) = 0x555555a16000 brk(0x555555a16c40) = 0x555555a16c40 arch_prctl(ARCH_SET_FS, 0x555555a16300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1521956866", 4096) = 28 brk(0x555555a37c40) = 0x555555a37c40 brk(0x555555a38000) = 0x555555a38000 mprotect(0x7f6cd3e02000, 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./strace-static-x86_64: Process 3603 attached , child_tidptr=0x555555a165d0) = 3603 [pid 3603] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3603] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3603] setsid() = 1 [pid 3603] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3603] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3603] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3603] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3603] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3603] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3603] unshare(CLONE_NEWNS) = 0 [pid 3603] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3603] unshare(CLONE_NEWIPC) = 0 [pid 3603] unshare(CLONE_NEWCGROUP) = 0 [pid 3603] unshare(CLONE_NEWUTS) = 0 [pid 3603] unshare(CLONE_SYSVSEM) = 0 [pid 3603] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3603] write(3, "16777216", 8) = 8 [pid 3603] close(3) = 0 [pid 3603] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3603] write(3, "536870912", 9) = 9 [pid 3603] close(3) = 0 [pid 3603] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3603] write(3, "1024", 4) = 4 [pid 3603] close(3) = 0 [pid 3603] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3603] write(3, "8192", 4) = 4 [pid 3603] close(3) = 0 [pid 3603] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3603] write(3, "1024", 4) = 4 [pid 3603] close(3) = 0 [pid 3603] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3603] write(3, "1024", 4) = 4 [pid 3603] close(3) = 0 [pid 3603] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3603] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3603] close(3) = 0 [pid 3603] getpid() = 1 [pid 3603] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 3603] kill(-2, SIGKILL) = 0 [pid 3603] kill(2, SIGKILL) = 0 [pid 3603] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 3603] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 3603] getdents64(3, 0x555555a17620 /* 2 entries */, 32768) = 48 [pid 3603] getdents64(3, 0x555555a17620 /* 0 entries */, 32768) = 0 [pid 3603] close(3) = 0 [ 76.180339][ T142] cfg80211: failed to load regulatory.db [ 286.091581][ T28] INFO: task syz-executor152:3619 blocked for more than 143 seconds. [ 286.099822][ T28] Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0 [ 286.113597][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.122597][ T28] task:syz-executor152 state:D stack:24568 pid: 3619 ppid: 3603 flags:0x00004006 [ 286.132072][ T28] Call Trace: [ 286.135363][ T28] [ 286.138303][ T28] __schedule+0x957/0xe20 [ 286.143181][ T28] ? __sched_text_start+0x8/0x8 [ 286.148069][ T28] schedule+0xcb/0x190 [ 286.152464][ T28] schedule_timeout+0xac/0x300 [ 286.157341][ T28] ? console_conditional_schedule+0x40/0x40 [ 286.163610][ T28] ? lockdep_hardirqs_on_prepare+0x448/0x7b0 [ 286.169635][ T28] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.175195][ T28] ? _raw_spin_unlock_irq+0x1f/0x40 [ 286.180424][ T28] ? lockdep_hardirqs_on+0x95/0x140 [ 286.185990][ T28] do_wait_for_common+0x3ea/0x560 [ 286.191055][ T28] ? console_conditional_schedule+0x40/0x40 [ 286.197379][ T28] ? bit_wait_io_timeout+0x110/0x110 [ 286.202961][ T28] ? _raw_spin_lock_irq+0xdb/0x110 [ 286.208099][ T28] ? __rcu_read_unlock+0x8f/0x100 [ 286.213526][ T28] ? start_flush_work+0x7a2/0x850 [ 286.218615][ T28] wait_for_completion+0x46/0x60 [ 286.223931][ T28] __cancel_work_timer+0x585/0x740 [ 286.229086][ T28] ? cancel_work_sync+0x20/0x20 [ 286.234267][ T28] ? mark_lock+0x98/0x350 [ 286.238629][ T28] ? start_flush_work+0x850/0x850 [ 286.244058][ T28] ? read_lock_is_recursive+0x10/0x10 [ 286.249460][ T28] tls_sk_proto_close+0x120/0x970 [ 286.254890][ T28] ? tls_getsockopt+0x11c0/0x11c0 [ 286.259935][ T28] ? down_write+0x10d/0x170 [ 286.264818][ T28] ? ip_mc_drop_socket+0x251/0x260 [ 286.269981][ T28] inet_release+0x184/0x1e0 [ 286.274907][ T28] sock_close+0xd7/0x260 [ 286.279220][ T28] ? __fput+0x3ac/0x820 [ 286.283796][ T28] ? sock_mmap+0x90/0x90 [ 286.288066][ T28] __fput+0x3b9/0x820 [ 286.292379][ T28] task_work_run+0x146/0x1c0 [ 286.297032][ T28] ptrace_notify+0x29a/0x340 [ 286.301997][ T28] ? do_notify_parent+0xeb0/0xeb0 [ 286.307051][ T28] ? kick_process+0xd6/0x140 [ 286.311994][ T28] ? task_work_add+0x121/0x200 [ 286.316795][ T28] syscall_exit_work+0x8c/0xe0 [ 286.321975][ T28] syscall_exit_to_user_mode_prepare+0x6b/0xc0 [ 286.328162][ T28] syscall_exit_to_user_mode+0xa/0x60 [ 286.333927][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.339985][ T28] RIP: 0033:0x7f6cd3d501a3 [ 286.344783][ T28] RSP: 002b:00007ffe793f9e78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 286.353523][ T28] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f6cd3d501a3 [ 286.361815][ T28] RDX: fffffffffffffe60 RSI: 00000000200005c0 RDI: 0000000000000005 [ 286.369899][ T28] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffffffffffe60 [ 286.378218][ T28] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe793f9e90 [ 286.386505][ T28] R13: 00007ffe793f9ea0 R14: 00007ffe793f9e84 R15: 00007f6cd3e06e88 [ 286.394773][ T28] [ 286.397873][ T28] [ 286.397873][ T28] Showing all locks held in the system: [ 286.406007][ T28] 1 lock held by rcu_tasks_kthre/12: [ 286.411566][ T28] #0: ffffffff8cb1f030 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.422455][ T28] 1 lock held by rcu_tasks_trace/13: [ 286.427760][ T28] #0: ffffffff8cb1f830 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.439115][ T28] 4 locks held by kworker/0:1/14: [ 286.444386][ T28] 1 lock held by khungtaskd/28: [ 286.449242][ T28] #0: ffffffff8cb1ee60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 286.458942][ T28] 2 locks held by getty/3279: [ 286.463858][ T28] #0: ffff88807e850098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 [ 286.474000][ T28] #1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 [ 286.484360][ T28] 3 locks held by kworker/0:3/3609: [ 286.489565][ T28] #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 [ 286.500199][ T28] #1: ffffc9000306fd00 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 [ 286.513707][ T28] #2: ffff88807cb178d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x111/0x150 [ 286.523693][ T28] 1 lock held by syz-executor152/3619: [ 286.529178][ T28] #0: ffff888070455010 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: sock_close+0x93/0x260 [ 286.539691][ T28] [ 286.542262][ T28] ============================================= [ 286.542262][ T28] [ 286.550680][ T28] NMI backtrace for cpu 1 [ 286.555010][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0 [ 286.564556][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.574618][ T28] Call Trace: [ 286.577901][ T28] [ 286.580835][ T28] dump_stack_lvl+0x1e3/0x2cb [ 286.585528][ T28] ? io_notif_register+0x5e7/0x5e7 [ 286.590649][ T28] ? panic+0x76e/0x76e [ 286.594720][ T28] ? console_unlock+0x6bd/0x6f0 [ 286.599587][ T28] ? console_trylock_spinning+0x450/0x450 [ 286.605319][ T28] ? nmi_cpu_backtrace+0x248/0x4a0 [ 286.610477][ T28] nmi_cpu_backtrace+0x473/0x4a0 [ 286.615427][ T28] ? vprintk_emit+0x109/0x1e0 [ 286.620126][ T28] ? nmi_trigger_cpumask_backtrace+0x280/0x280 [ 286.626290][ T28] ? _printk+0xcf/0x10f [ 286.630457][ T28] ? panic+0x76e/0x76e [ 286.634526][ T28] ? __wake_up_klogd+0xcd/0x100 [ 286.639372][ T28] ? panic+0x76e/0x76e [ 286.643435][ T28] ? __rcu_read_unlock+0x8f/0x100 [ 286.648464][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 286.654592][ T28] nmi_trigger_cpumask_backtrace+0x168/0x280 [ 286.660571][ T28] watchdog+0xcd5/0xd20 [ 286.664773][ T28] kthread+0x266/0x300 [ 286.668846][ T28] ? hungtask_pm_notify+0x50/0x50 [ 286.673862][ T28] ? kthread_blkcg+0xd0/0xd0 [ 286.678443][ T28] ret_from_fork+0x1f/0x30 [ 286.682885][ T28] [ 286.686196][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.691439][ C0] NMI backtrace for cpu 0 [ 286.691448][ C0] CPU: 0 PID: 2960 Comm: klogd Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0 [ 286.691462][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.691469][ C0] RIP: 0033:0x7f305d98aa4c [ 286.691481][ C0] Code: 00 e8 88 6c 00 00 48 8b 05 d9 e3 13 00 41 83 24 24 fe 41 81 4c 24 74 80 00 00 00 49 89 84 24 e0 00 00 00 48 8b 05 44 e5 13 00 <4d> 89 ac 24 f0 00 00 00 49 89 84 24 e8 00 00 00 49 89 9c 24 f8 00 [ 286.691491][ C0] RSP: 002b:00007ffcfff3ac30 EFLAGS: 00000202 [ 286.691503][ C0] RAX: 00007f305d9984b0 RBX: 00007ffcfff3ac88 RCX: 0000000000000000 [ 286.691512][ C0] RDX: 00000000fbad0000 RSI: 0000564f72a71090 RDI: 0000000000000000 [ 286.691521][ C0] RBP: 0000564f72a71090 R08: 0000000000000000 R09: 00007f305dac9a60 [ 286.691529][ C0] R10: 000000000000006b R11: 0000000000000000 R12: 0000564f72a6c910 [ 286.691537][ C0] R13: 00007ffcfff3ac80 R14: 00007f305db8477d R15: 00007ffcfff3ad68 [ 286.691546][ C0] FS: 00007f305d86d800 GS: 0000000000000000 [ 286.694966][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 286.801284][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0 [ 286.810809][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.820847][ T28] Call Trace: [ 286.824113][ T28] [ 286.827043][ T28] dump_stack_lvl+0x1e3/0x2cb [ 286.831723][ T28] ? io_notif_register+0x5e7/0x5e7 [ 286.836853][ T28] ? panic+0x76e/0x76e [ 286.840926][ T28] ? vscnprintf+0x59/0x80 [ 286.845291][ T28] panic+0x312/0x76e [ 286.849175][ T28] ? schedule_preempt_disabled+0x20/0x20 [ 286.854803][ T28] ? nmi_trigger_cpumask_backtrace+0x205/0x280 [ 286.860971][ T28] ? fb_is_primary_device+0xcc/0xcc [ 286.866153][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 286.872222][ T28] ? nmi_trigger_cpumask_backtrace+0x205/0x280 [ 286.878383][ T28] ? nmi_trigger_cpumask_backtrace+0x265/0x280 [ 286.884533][ T28] watchdog+0xd16/0xd20 [ 286.888679][ T28] kthread+0x266/0x300 [ 286.892733][ T28] ? hungtask_pm_notify+0x50/0x50 [ 286.897742][ T28] ? kthread_blkcg+0xd0/0xd0 [ 286.902314][ T28] ret_from_fork+0x1f/0x30 [ 286.906725][ T28] [ 286.910002][ T28] Kernel Offset: disabled [ 286.914326][ T28] Rebooting in 86400 seconds..