./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1557813923 <...> Warning: Permanently added '10.128.0.192' (ED25519) to the list of known hosts. execve("./syz-executor1557813923", ["./syz-executor1557813923"], 0x7fff5f7f0df0 /* 10 vars */) = 0 brk(NULL) = 0x5555558fa000 brk(0x5555558fad00) = 0x5555558fad00 arch_prctl(ARCH_SET_FS, 0x5555558fa380) = 0 set_tid_address(0x5555558fa650) = 5054 set_robust_list(0x5555558fa660, 24) = 0 rseq(0x5555558faca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1557813923", 4096) = 28 getrandom("\xe4\x85\x4d\xc6\x76\x74\xdd\x60", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555558fad00 brk(0x55555591bd00) = 0x55555591bd00 brk(0x55555591c000) = 0x55555591c000 mprotect(0x7f2ff4341000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5055 attached [pid 5055] set_robust_list(0x5555558fa660, 24 [pid 5054] <... clone resumed>, child_tidptr=0x5555558fa650) = 5055 [pid 5055] <... set_robust_list resumed>) = 0 [pid 5055] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5055] setpgid(0, 0) = 0 [pid 5055] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1000", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3 [pid 5055] socket(AF_INET, SOCK_SEQPACKET, IPPROTO_IP) = 4 [pid 5055] ioctl(3, NBD_SET_SOCK, 4) = 0 [pid 5055] listen(4, 7757) = 0 [pid 5055] ioctl(3, NBD_DO_IT [pid 5054] kill(-5055, SIGKILL) = 0 [pid 5054] kill(5055, SIGKILL) = 0 [ 59.156456][ T5055] block nbd0: shutting down sockets [pid 5054] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5054] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5054] getdents64(3, 0x5555558fb6f0 /* 2 entries */, 32768) = 48 [pid 5054] getdents64(3, 0x5555558fb6f0 /* 0 entries */, 32768) = 0 [pid 5054] close(3) = 0 [ 76.126612][ T9] cfg80211: failed to load regulatory.db [ 286.044155][ T29] INFO: task syz-executor155:5055 blocked for more than 143 seconds. [ 286.052336][ T29] Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0 [ 286.059907][ T29] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.068758][ T29] task:syz-executor155 state:D stack:27360 pid:5055 tgid:5055 ppid:5054 flags:0x00004006 [ 286.078998][ T29] Call Trace: [ 286.082277][ T29] [ 286.085231][ T29] __schedule+0xf12/0x5c00 [ 286.089686][ T29] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 286.095703][ T29] ? hlock_class+0x4e/0x130 [ 286.100231][ T29] ? io_schedule_timeout+0x150/0x150 [ 286.105541][ T29] ? schedule+0x1fc/0x270 [ 286.109871][ T29] ? reacquire_held_locks+0x4c0/0x4c0 [ 286.115290][ T29] schedule+0xe9/0x270 [ 286.119368][ T29] schedule_timeout+0x257/0x290 [ 286.124240][ T29] ? usleep_range_state+0x1a0/0x1a0 [ 286.129455][ T29] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.134701][ T29] __wait_for_common+0x3e0/0x5f0 [ 286.139649][ T29] ? usleep_range_state+0x1a0/0x1a0 [ 286.144872][ T29] ? out_of_line_wait_on_bit_timeout+0x170/0x170 [ 286.151209][ T29] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.156441][ T29] ? flush_workqueue_prep_pwqs+0x28f/0x4f0 [ 286.162264][ T29] ? check_flush_dependency+0x86/0x460 [ 286.167753][ T29] __flush_workqueue+0x3e0/0x1340 [ 286.172804][ T29] ? blk_mq_run_hw_queue+0x2b1/0x9a0 [ 286.178152][ T29] ? apply_wqattrs_cleanup.part.0+0x2b0/0x2b0 [ 286.184286][ T29] ? blk_mq_run_hw_queues+0x1fb/0x290 [ 286.189682][ T29] ? nbd_ioctl+0x308/0xd60 [ 286.194141][ T29] nbd_ioctl+0x308/0xd60 [ 286.198421][ T29] ? nbd_start_device+0xe00/0xe00 [ 286.203468][ T29] ? prepare_to_swait_exclusive+0x240/0x240 [ 286.209419][ T29] ? nbd_start_device+0xe00/0xe00 [ 286.214496][ T29] blkdev_ioctl+0x2f3/0x760 [ 286.218991][ T29] ? blkdev_common_ioctl+0x1cc0/0x1cc0 [ 286.224469][ T29] ? bpf_lsm_file_ioctl+0x9/0x10 [ 286.229415][ T29] ? blkdev_common_ioctl+0x1cc0/0x1cc0 [ 286.234995][ T29] __x64_sys_ioctl+0x18f/0x210 [ 286.239777][ T29] do_syscall_64+0xd3/0x250 [ 286.244303][ T29] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 286.250210][ T29] RIP: 0033:0x7f2ff42ce879 [ 286.254659][ T29] RSP: 002b:00007fff888fa4c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 286.263092][ T29] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2ff42ce879 [ 286.271077][ T29] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 [ 286.279071][ T29] RBP: 00007f2ff43415f0 R08: 0000000000000006 R09: 0000000000000006 [ 286.287058][ T29] R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000001 [ 286.295081][ T29] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 286.303049][ T29] [ 286.306088][ T29] [ 286.306088][ T29] Showing all locks held in the system: [ 286.313797][ T29] 1 lock held by khungtaskd/29: [ 286.318711][ T29] #0: ffffffff8d1acbe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 [ 286.328619][ T29] 6 locks held by kworker/u4:5/1029: [ 286.333931][ T29] 2 locks held by kworker/u5:1/4452: [ 286.339261][ T29] #0: ffff88801e5a6138 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 [ 286.349953][ T29] #1: ffffc9000dbe7d80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 [ 286.361130][ T29] 2 locks held by getty/4806: [ 286.365825][ T29] #0: ffff888028f540a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 [ 286.375601][ T29] #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 [ 286.385776][ T29] [ 286.388098][ T29] ============================================= [ 286.388098][ T29] [ 286.396529][ T29] NMI backtrace for cpu 0 [ 286.400849][ T29] CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0 [ 286.410624][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 286.420652][ T29] Call Trace: [ 286.423908][ T29] [ 286.426816][ T29] dump_stack_lvl+0xd9/0x1b0 [ 286.431389][ T29] nmi_cpu_backtrace+0x277/0x390 [ 286.436319][ T29] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 286.441516][ T29] nmi_trigger_cpumask_backtrace+0x299/0x300 [ 286.447493][ T29] watchdog+0xf87/0x1210 [ 286.451733][ T29] ? proc_dohung_task_timeout_secs+0x90/0x90 [ 286.457736][ T29] ? lockdep_hardirqs_on+0x7d/0x110 [ 286.462926][ T29] ? __kthread_parkme+0x14b/0x220 [ 286.467941][ T29] ? proc_dohung_task_timeout_secs+0x90/0x90 [ 286.473911][ T29] kthread+0x2c6/0x3a0 [ 286.477970][ T29] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.483164][ T29] ? kthread_complete_and_exit+0x40/0x40 [ 286.488790][ T29] ret_from_fork+0x45/0x80 [ 286.493202][ T29] ? kthread_complete_and_exit+0x40/0x40 [ 286.498831][ T29] ret_from_fork_asm+0x11/0x20 [ 286.503599][ T29] [ 286.506716][ T29] Sending NMI from CPU 0 to CPUs 1: [ 286.511928][ C1] NMI backtrace for cpu 1 [ 286.511935][ C1] CPU: 1 PID: 1029 Comm: kworker/u4:5 Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0 [ 286.511949][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 286.511957][ C1] Workqueue: events_unbound toggle_allocation_gate [ 286.511977][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 [ 286.511996][ C1] Code: fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 48 8b 14 25 80 c2 03 00 <65> 8b 05 d4 9b 7b 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 [ 286.512008][ C1] RSP: 0018:ffffc9000415f9a0 EFLAGS: 00000002 [ 286.512016][ C1] RAX: 0000000000000000 RBX: ffff888013084558 RCX: ffffffff812fe9c2 [ 286.512024][ C1] RDX: ffff888020338000 RSI: 0000000000000000 RDI: 0000000000000007 [ 286.512031][ C1] RBP: ffffffff81d641c2 R08: 0000000000000007 R09: 0000000000000000 [ 286.512038][ C1] R10: 0000000000000001 R11: 0000000000000006 R12: 00000000000001c3 [ 286.512045][ C1] R13: 8000000000000063 R14: 0000000000000001 R15: 8000000000000063 [ 286.512057][ C1] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 286.512069][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.512077][ C1] CR2: 000055d21c904680 CR3: 000000000cf78000 CR4: 0000000000350ef0 [ 286.512084][ C1] Call Trace: [ 286.512089][ C1] [ 286.512093][ C1] ? show_regs+0x8f/0xa0 [ 286.512108][ C1] ? nmi_cpu_backtrace+0x1d4/0x390 [ 286.512124][ C1] ? nmi_cpu_backtrace_handler+0xc/0x10 [ 286.512143][ C1] ? nmi_handle+0x1a6/0x570 [ 286.512157][ C1] ? x86_pmu_event_mapped+0x1c0/0x1c0 [ 286.512177][ C1] ? __sanitizer_cov_trace_pc+0xd/0x60 [ 286.512199][ C1] ? default_do_nmi+0x6a/0x160 [ 286.512218][ C1] ? exc_nmi+0x186/0x200 [ 286.512236][ C1] ? end_repeat_nmi+0xf/0x2a [ 286.512252][ C1] ? kmem_cache_alloc_node+0xa2/0x340 [ 286.512271][ C1] ? __text_poke+0x2e2/0xca0 [ 286.512283][ C1] ? __sanitizer_cov_trace_pc+0xd/0x60 [ 286.512299][ C1] ? __sanitizer_cov_trace_pc+0xd/0x60 [ 286.512315][ C1] ? __sanitizer_cov_trace_pc+0xd/0x60 [ 286.512330][ C1] [ 286.512333][ C1] [ 286.512336][ C1] __text_poke+0x9c5/0xca0 [ 286.512349][ C1] ? setup_data_read+0x280/0x280 [ 286.512363][ C1] ? apply_relocation+0x830/0x830 [ 286.512375][ C1] ? kmem_cache_alloc_node+0xa2/0x340 [ 286.512394][ C1] text_poke_bp_batch+0x493/0x750 [ 286.512408][ C1] ? kmem_cache_alloc_bulk+0x1b7/0x940 [ 286.512426][ C1] ? alternatives_enable_smp+0x400/0x400 [ 286.512439][ C1] ? __jump_label_patch+0x1db/0x400 [ 286.512456][ C1] ? text_poke_queue+0xef/0x180 [ 286.512471][ C1] ? arch_jump_label_transform_queue+0xc0/0x110 [ 286.512492][ C1] text_poke_finish+0x30/0x40 [ 286.512505][ C1] arch_jump_label_transform_apply+0x1c/0x30 [ 286.512523][ C1] jump_label_update+0x1d7/0x400 [ 286.512542][ C1] static_key_enable_cpuslocked+0x1b7/0x270 [ 286.512561][ C1] static_key_enable+0x1a/0x20 [ 286.512577][ C1] toggle_allocation_gate+0xf4/0x250 [ 286.512594][ C1] ? wake_up_kfence_timer+0x30/0x30 [ 286.512614][ C1] process_one_work+0x886/0x15d0 [ 286.512633][ C1] ? lock_sync+0x190/0x190 [ 286.512644][ C1] ? workqueue_congested+0x300/0x300 [ 286.512663][ C1] ? assign_work+0x1a0/0x250 [ 286.512679][ C1] worker_thread+0x8b9/0x1290 [ 286.512699][ C1] ? __kthread_parkme+0x14b/0x220 [ 286.512713][ C1] ? process_one_work+0x15d0/0x15d0 [ 286.512729][ C1] kthread+0x2c6/0x3a0 [ 286.512743][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.512758][ C1] ? kthread_complete_and_exit+0x40/0x40 [ 286.512774][ C1] ret_from_fork+0x45/0x80 [ 286.512788][ C1] ? kthread_complete_and_exit+0x40/0x40 [ 286.512804][ C1] ret_from_fork_asm+0x11/0x20 [ 286.512824][ C1] [ 286.512925][ T29] Kernel panic - not syncing: hung_task: blocked tasks [ 286.882117][ T29] CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0 [ 286.891912][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 286.901953][ T29] Call Trace: [ 286.905222][ T29] [ 286.908143][ T29] dump_stack_lvl+0xd9/0x1b0 [ 286.912730][ T29] panic+0x6dc/0x790 [ 286.916619][ T29] ? panic_smp_self_stop+0xa0/0xa0 [ 286.921730][ T29] ? irq_work_claim+0x76/0x90 [ 286.926396][ T29] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 286.931590][ T29] ? irq_work_queue+0x2a/0x70 [ 286.936258][ T29] ? watchdog+0xd3e/0x1210 [ 286.940666][ T29] ? watchdog+0xd31/0x1210 [ 286.945082][ T29] watchdog+0xd4f/0x1210 [ 286.949323][ T29] ? proc_dohung_task_timeout_secs+0x90/0x90 [ 286.955295][ T29] ? lockdep_hardirqs_on+0x7d/0x110 [ 286.960489][ T29] ? __kthread_parkme+0x14b/0x220 [ 286.965503][ T29] ? proc_dohung_task_timeout_secs+0x90/0x90 [ 286.971476][ T29] kthread+0x2c6/0x3a0 [ 286.975535][ T29] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.980726][ T29] ? kthread_complete_and_exit+0x40/0x40 [ 286.986350][ T29] ret_from_fork+0x45/0x80 [ 286.990761][ T29] ? kthread_complete_and_exit+0x40/0x40 [ 286.996386][ T29] ret_from_fork_asm+0x11/0x20 [ 287.001150][ T29] [ 287.004380][ T29] Kernel Offset: disabled [ 287.008689][ T29] Rebooting in 86400 seconds..