[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.365948] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.362446] random: sshd: uninitialized urandom read (32 bytes read) [ 27.646944] random: sshd: uninitialized urandom read (32 bytes read) [ 28.347901] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. [ 33.915477] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/05 03:45:19 fuzzer started [ 35.222539] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/05 03:45:21 connecting to host at 10.128.0.26:36113 2018/09/05 03:45:21 checking revisions... 2018/09/05 03:45:21 testing simple program... executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 185.201678] INFO: task syz-fuzzer:4899 blocked for more than 140 seconds. [ 185.208803] Not tainted 4.19.0-rc2-next-20180905+ #56 [ 185.214593] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 185.222606] syz-fuzzer D22208 4899 4884 0x00000000 [ 185.228308] Call Trace: [ 185.230957] __schedule+0x87c/0x1df0 [ 185.234730] ? __sched_text_start+0x8/0x8 [ 185.238941] ? ext4_set_page_dirty+0x254/0x340 [ 185.243601] ? graph_lock+0x170/0x170 [ 185.247455] ? print_usage_bug+0xc0/0xc0 [ 185.251604] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 185.257195] ? find_held_lock+0x36/0x1c0 [ 185.261306] schedule+0xfb/0x450 [ 185.264731] ? mark_held_locks+0xc9/0x160 [ 185.268945] ? __schedule+0x1df0/0x1df0 [ 185.272972] ? _raw_spin_unlock_irq+0x27/0x70 [ 185.277520] ? _raw_spin_unlock_irq+0x27/0x70 [ 185.282065] ? lockdep_hardirqs_on+0x421/0x5c0 [ 185.286696] ? trace_hardirqs_on+0xbd/0x2c0 [ 185.291065] ? kasan_check_read+0x11/0x20 [ 185.295262] ? __lock_page+0x585/0x7a0 [ 185.299202] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 185.304388] ? kasan_check_write+0x14/0x20 [ 185.308784] io_schedule+0x1c/0x70 [ 185.312391] __lock_page+0x5b7/0x7a0 [ 185.316180] ? __lock_page_killable+0x850/0x850 [ 185.320906] ? __sb_end_write+0xac/0xe0 [ 185.324943] ? ext4_page_mkwrite+0xa95/0x1450 [ 185.329499] ? page_cache_tree_insert+0x560/0x560 [ 185.334412] ? __lock_is_held+0xb5/0x140 [ 185.338542] ? check_same_owner+0x340/0x340 [ 185.342981] ? rcu_note_context_switch+0x680/0x680 [ 185.347979] do_page_mkwrite+0x429/0x520 [ 185.352088] ? print_bad_pte+0x5f0/0x5f0 [ 185.356211] ? pud_val+0x88/0x100 [ 185.359717] ? find_held_lock+0x36/0x1c0 [ 185.363842] __handle_mm_fault+0x2a0a/0x4350 [ 185.368310] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 185.373198] ? graph_lock+0x170/0x170 [ 185.377053] ? kasan_check_read+0x11/0x20 [ 185.381260] ? lock_downgrade+0x8f0/0x8f0 [ 185.385451] ? handle_mm_fault+0x8c4/0xc80 [ 185.389734] ? handle_mm_fault+0x8c4/0xc80 [ 185.394032] ? kasan_check_read+0x11/0x20 [ 185.398231] ? rcu_is_watching+0x8c/0x150 [ 185.402424] ? __do_page_fault+0x620/0xe50 [ 185.406722] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 185.411444] handle_mm_fault+0x53e/0xc80 [ 185.415601] ? __handle_mm_fault+0x4350/0x4350 [ 185.420230] ? find_vma+0x34/0x190 [ 185.423822] __do_page_fault+0x620/0xe50 [ 185.427947] ? mm_fault_error+0x380/0x380 [ 185.432149] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 185.437593] ? trace_hardirqs_on+0x2c0/0x2c0 [ 185.442057] do_page_fault+0xf6/0x7a4 [ 185.445910] ? vmalloc_sync_all+0x30/0x30 [ 185.450114] ? error_entry+0x70/0xd0 [ 185.453875] ? trace_hardirqs_off_caller+0xbb/0x2b0 [ 185.458974] ? trace_hardirqs_on_caller+0xc0/0x2b0 [ 185.463970] ? syscall_return_slowpath+0x5e0/0x5e0 [ 185.468952] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 185.473842] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 185.478907] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 185.484410] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 185.489473] ? prepare_exit_to_usermode+0x291/0x3b0 [ 185.494559] ? page_fault+0x8/0x30 [ 185.498196] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 185.503087] ? page_fault+0x8/0x30 [ 185.506672] page_fault+0x1e/0x30 [ 185.510166] RIP: 0033:0x70b591 [ 185.513427] Code: 48 89 6c 24 10 48 8d 6c 24 10 48 8b 44 24 20 48 8b 48 08 48 8b 50 10 48 8d 58 08 48 83 fa 08 0f 8c 1e 01 00 00 48 8b 54 24 28 <88> 11 48 8b 48 08 48 8b 70 10 48 83 fe 01 0f 86 44 01 00 00 48 89 [ 185.532373] RSP: 002b:000000c42014f3f0 EFLAGS: 00010212 [ 185.537781] RAX: 000000c42014f508 RBX: 000000c42014f510 RCX: 00007fbc9afd5000 [ 185.545095] RDX: 0000000000000537 RSI: 000000000072a470 RDI: 000000c42014f348 [ 185.552425] RBP: 000000c42014f400 R08: 0000000000000000 R09: 0000000000000000 [ 185.559751] R10: 00000000009496ca R11: 0000000000000004 R12: 0000000000000000 [ 185.567067] R13: 0000000000000020 R14: 0000000000000013 R15: 000000000000000f [ 185.574396] [ 185.574396] Showing all locks held in the system: [ 185.580774] 4 locks held by kworker/u4:1/22: [ 185.585353] #0: 0000000095cbdd52 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xb44/0x1aa0 [ 185.594950] #1: 00000000b5b1d5c7 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xb9b/0x1aa0 [ 185.605609] #2: 0000000085495e9e (&fc->fs_type->s_umount_key#29){++++}, at: trylock_super+0x22/0x110 [ 185.615604] #3: 00000000a970abef (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0x9a/0x1a0 [ 185.624803] 1 lock held by khungtaskd/793: [ 185.629080] #0: 00000000bdee56b6 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 [ 185.637759] 1 lock held by khugepaged/799: [ 185.642032] #0: 00000000aeff0d11 (&mm->mmap_sem){++++}, at: collapse_huge_page+0x2bf/0x2250 [ 185.650744] 1 lock held by rsyslogd/4772: [ 185.654940] 2 locks held by getty/4863: [ 185.658952] #0: 000000000f7c87c9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 185.667274] #1: 000000003cfec3ec (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 185.676197] 2 locks held by getty/4864: [ 185.680205] #0: 00000000b13e7259 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 185.688519] #1: 000000001b825085 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 185.697482] 2 locks held by getty/4865: [ 185.701491] #0: 0000000066849b2e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 185.709811] #1: 000000006f8a310e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 185.718756] 2 locks held by getty/4866: [ 185.722788] #0: 0000000059f2c060 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 185.731118] #1: 000000008b772f19 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 185.740044] 2 locks held by getty/4867: [ 185.744057] #0: 00000000d4a99ddb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 185.752371] #1: 00000000a50b7480 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 185.761294] 2 locks held by getty/4868: [ 185.765303] #0: 00000000cce11d68 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 185.773615] #1: 0000000024ece848 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 185.782535] 2 locks held by getty/4869: [ 185.786598] #0: 0000000090243033 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 185.794908] #1: 000000004dedc1eb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 185.803826] 1 lock held by syz-fuzzer/4899: [ 185.808186] #0: 00000000aeff0d11 (&mm->mmap_sem){++++}, at: __do_page_fault+0x389/0xe50 [ 185.816494] [ 185.818155] ============================================= [ 185.818155] [ 185.825201] NMI backtrace for cpu 0 [ 185.828875] CPU: 0 PID: 793 Comm: khungtaskd Not tainted 4.19.0-rc2-next-20180905+ #56 [ 185.836933] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 185.846282] Call Trace: [ 185.848887] dump_stack+0x1c9/0x2b4 [ 185.852525] ? dump_stack_print_info.cold.2+0x52/0x52 [ 185.857719] ? vprintk_default+0x28/0x30 [ 185.861794] ? lapic_can_unplug_cpu.cold.30+0x3f/0x3f [ 185.866996] nmi_cpu_backtrace.cold.4+0x48/0x88 [ 185.871678] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 185.876356] ? lapic_can_unplug_cpu.cold.30+0x3f/0x3f [ 185.881555] nmi_trigger_cpumask_backtrace+0x1b6/0x1cd [ 185.886852] arch_trigger_cpumask_backtrace+0x14/0x20 [ 185.892055] watchdog+0xb39/0x1040 [ 185.895616] ? reset_hung_task_detector+0xd0/0xd0 [ 185.900477] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 185.905587] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 185.910701] ? lockdep_hardirqs_on+0x421/0x5c0 [ 185.915293] ? trace_hardirqs_on+0xbd/0x2c0 [ 185.919625] ? kasan_check_read+0x11/0x20 [ 185.923787] ? __kthread_parkme+0xd7/0x1b0 [ 185.928045] ? kasan_check_write+0x14/0x20 [ 185.932290] ? do_raw_spin_lock+0xc1/0x200 [ 185.936535] ? __kthread_parkme+0x58/0x1b0 [ 185.940782] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 185.946330] ? __kthread_parkme+0x106/0x1b0 [ 185.950664] kthread+0x35a/0x420 [ 185.954039] ? reset_hung_task_detector+0xd0/0xd0 [ 185.958888] ? kthread_bind+0x40/0x40 [ 185.962695] ret_from_fork+0x3a/0x50 [ 185.966472] Sending NMI from CPU 0 to CPUs 1: [ 185.972502] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.361 msecs [ 185.973018] NMI backtrace for cpu 1 [ 185.973026] CPU: 1 PID: 4891 Comm: syz-fuzzer Not tainted 4.19.0-rc2-next-20180905+ #56 [ 185.973033] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 185.973038] RIP: 0010:lock_acquire+0x3da/0x4f0 [ 185.973052] Code: 8c 65 a3 7e 48 ba 00 00 00 00 00 fc ff df 48 8d 45 98 48 c1 e8 03 48 01 d0 c6 00 00 48 8b 15 c5 e0 4c 07 48 89 55 98 c6 00 f8 51 bb 06 00 85 c0 74 09 80 3d f9 8d 4c 07 00 74 42 65 ff 0d 4d [ 185.973057] RSP: 0018:ffff8801b7276a68 EFLAGS: 00000082 [ 185.973066] RAX: ffffed0036e4ed5e RBX: 1ffff10036e4ed52 RCX: 0000000000000000 [ 185.973073] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801b650ac3c [ 185.973079] RBP: ffff8801b7276b58 R08: 0000000000000000 R09: 0000000000000000 [ 185.973085] R10: 000000000000bcd6 R11: ffff8801db1236f3 R12: 0000000000000000 [ 185.973092] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 [ 185.973099] FS: 000000c420087c68(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 [ 185.973104] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 185.973110] CR2: ffffffffff600400 CR3: 00000001be4de000 CR4: 00000000001406e0 [ 185.973114] Call Trace: [ 185.973118] ? lock_release+0x9f0/0x9f0 [ 185.973122] ? graph_lock+0x170/0x170 [ 185.973126] ? graph_lock+0x170/0x170 [ 185.973130] ? print_usage_bug+0xc0/0xc0 [ 185.973134] cpuacct_charge+0x102/0x5d0 [ 185.973139] ? cpuacct_charge+0xd4/0x5d0 [ 185.973143] ? cpuacct_css_alloc+0x160/0x160 [ 185.973147] update_curr+0x389/0xba0 [ 185.973151] ? graph_lock+0x170/0x170 [ 185.973156] ? __account_cfs_rq_runtime+0x770/0x770 [ 185.973161] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 185.973165] ? __lock_acquire+0x7fc/0x5020 [ 185.973170] ? find_held_lock+0x36/0x1c0 [ 185.973174] ? graph_lock+0x170/0x170 [ 185.973178] dequeue_entity+0xd3/0x16e0 [ 185.973182] ? trace_hardirqs_on+0xbd/0x2c0 [ 185.973186] ? graph_lock+0x170/0x170 [ 185.973190] ? reweight_task+0x130/0x130 [ 185.973195] ? __lock_acquire+0x7fc/0x5020 [ 185.973199] ? ___ratelimit.cold.2+0x6b/0x6b [ 185.973204] ? get_user_pages_fast+0x2a9/0x450 [ 185.973208] ? mark_held_locks+0x160/0x160 [ 185.973212] ? graph_lock+0x170/0x170 [ 185.973216] ? kasan_check_read+0x11/0x20 [ 185.973221] ? rcu_is_watching+0x8c/0x150 [ 185.973225] ? rcu_pm_notify+0xc0/0xc0 [ 185.973229] dequeue_task_fair+0xfd/0xa10 [ 185.973234] ? rcu_read_lock_sched_held+0x108/0x120 [ 185.973239] ? dequeue_entity+0x16e0/0x16e0 [ 185.973243] ? pvclock_read_flags+0x160/0x160 [ 185.973247] ? graph_lock+0x170/0x170 [ 185.973251] ? __lock_is_held+0xb5/0x140 [ 185.973256] deactivate_task+0xf3/0x330 [ 185.973260] __schedule+0x9c9/0x1df0 [ 185.973264] ? __sched_text_start+0x8/0x8 [ 185.973269] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 185.973274] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 185.973278] ? lockdep_hardirqs_on+0x421/0x5c0 [ 185.973283] ? trace_hardirqs_on+0xbd/0x2c0 [ 185.973287] ? kasan_check_read+0x11/0x20 [ 185.973292] ? hrtimer_start_range_ns+0x69a/0xcd0 [ 185.973297] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 185.973301] ? tick_program_event+0xb2/0x130 [ 185.973306] ? hrtimer_start_range_ns+0x69a/0xcd0 [ 185.973310] schedule+0xfb/0x450 [ 185.973314] ? __schedule+0x1df0/0x1df0 [ 185.973318] ? __debug_object_init+0x581/0x12e0 [ 185.973322] ? kasan_check_read+0x11/0x20 [ 185.973339] ? do_raw_spin_unlock+0xa7/0x2f0 [ 185.973343] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 185.973347] ? lock_acquire+0x1e4/0x4f0 [ 185.973351] futex_wait_queue_me+0x3f9/0x840 [ 185.973357] ? refill_pi_state_cache.part.8+0x320/0x320 [ 185.973361] ? kasan_check_write+0x14/0x20 [ 185.973365] ? do_raw_spin_lock+0xc1/0x200 [ 185.973370] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 185.973374] ? get_futex_value_locked+0xcb/0xf0 [ 185.973379] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 185.973383] ? futex_wait_setup+0x281/0x410 [ 185.973387] ? futex_wake+0x760/0x760 [ 185.973392] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 185.973396] ? __hrtimer_init+0xdb/0x240 [ 185.973400] futex_wait+0x45b/0xa20 [ 185.973405] ? futex_wait_setup+0x410/0x410 [ 185.973409] ? print_usage_bug+0xc0/0xc0 [ 185.973413] ? graph_lock+0x170/0x170 [ 185.973417] ? clock_was_set_work+0x30/0x30 [ 185.973422] ? mark_held_locks+0x160/0x160 [ 185.973425] do_futex+0x336/0x27d0 [ 185.973430] ? mark_held_locks+0x160/0x160 [ 185.973434] ? finish_task_switch+0x1d3/0x870 [ 185.973439] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 185.973443] ? compat_start_thread+0x80/0x80 [ 185.973447] ? exit_robust_list+0x290/0x290 [ 185.973451] ? kasan_check_write+0x14/0x20 [ 185.973456] ? finish_task_switch+0x2ca/0x870 [ 185.973460] ? preempt_notifier_register+0x200/0x200 [ 185.973464] ? graph_lock+0x170/0x170 [ 185.973468] ? __switch_to_asm+0x40/0x70 [ 185.973473] ? __switch_to_asm+0x34/0x70 [ 185.973477] ? __switch_to_asm+0x40/0x70 [ 185.973481] ? __switch_to_asm+0x40/0x70 [ 185.973485] ? __switch_to_asm+0x34/0x70 [ 185.973489] ? __switch_to_asm+0x34/0x70 [ 185.973493] ? __switch_to_asm+0x40/0x70 [ 185.973497] ? __switch_to_asm+0x34/0x70 [ 185.973501] ? __switch_to_asm+0x34/0x70 [ 185.973505] ? __switch_to_asm+0x40/0x70 [ 185.973509] ? find_held_lock+0x36/0x1c0 [ 185.973525] ? lock_downgrade+0x8f0/0x8f0 [ 185.973529] ? ktime_get+0x352/0x440 [ 185.973533] ? ktime_get+0x352/0x440 [ 185.973538] ? pvclock_read_flags+0x160/0x160 [ 185.973543] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 185.973552] ? lock_downgrade+0x8f0/0x8f0 [ 185.973557] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 185.973561] ? ktime_get+0x2e1/0x440 [ 185.973566] ? ktime_get_raw_ts64+0x4f0/0x4f0 [ 185.973571] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 185.973575] __x64_sys_futex+0x472/0x6a0 [ 185.973579] ? do_futex+0x27d0/0x27d0 [ 185.973584] ? exit_to_usermode_loop+0x1f4/0x380 [ 185.973589] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 185.973594] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 185.973598] do_syscall_64+0x1b9/0x820 [ 185.973603] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 185.973608] ? syscall_return_slowpath+0x5e0/0x5e0 [ 185.973613] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 185.973618] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 185.973623] ? prepare_exit_to_usermode+0x291/0x3b0 [ 185.973627] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 185.973632] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 185.973636] RIP: 0033:0x45ddf3 [ 185.973650] Code: cc cc cc cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14 4c 8b 54 24 18 4c 8b 44 24 20 44 8b 4c 24 28 b8 ca 00 00 00 0f 05 <89> 44 24 30 c3 cc cc cc cc cc cc cc cc 8b 7c 24 08 48 8b 74 24 10 [ 185.973655] RSP: 002b:000000c420133ea8 EFLAGS: 00000206 ORIG_RAX: 00000000000000ca [ 185.973666] RAX: ffffffffffffffda RBX: 00000000000186a0 RCX: 000000000045ddf3 [ 185.973672] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001486028 [ 185.973679] RBP: 000000c420133ef0 R08: 0000000000000000 R09: 0000000000000000 [ 185.973685] R10: 000000c420133ee0 R11: 0000000000000206 R12: 0000000000000001 [ 185.973691] R13: 000000c42005c300 R14: 0000000000000001 R15: 0000000000000000 [ 185.973733] Kernel panic - not syncing: hung_task: blocked tasks [ 186.649420] CPU: 0 PID: 793 Comm: khungtaskd Not tainted 4.19.0-rc2-next-20180905+ #56 [ 186.657482] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 186.666886] Call Trace: [ 186.669501] dump_stack+0x1c9/0x2b4 [ 186.673151] ? dump_stack_print_info.cold.2+0x52/0x52 [ 186.678366] ? printk_safe_log_store+0x2f0/0x2f0 [ 186.683144] panic+0x238/0x4e7 [ 186.686360] ? add_taint.cold.5+0x16/0x16 [ 186.690526] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 186.696079] ? nmi_trigger_cpumask_backtrace+0x18c/0x1cd [ 186.701534] ? printk_safe_flush+0xd7/0x130 [ 186.705869] watchdog+0xb4a/0x1040 [ 186.709428] ? reset_hung_task_detector+0xd0/0xd0 [ 186.714285] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 186.719858] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 186.725057] ? lockdep_hardirqs_on+0x421/0x5c0 [ 186.729644] ? trace_hardirqs_on+0xbd/0x2c0 [ 186.733979] ? kasan_check_read+0x11/0x20 [ 186.738138] ? __kthread_parkme+0xd7/0x1b0 [ 186.742392] ? kasan_check_write+0x14/0x20 [ 186.746634] ? do_raw_spin_lock+0xc1/0x200 [ 186.750883] ? __kthread_parkme+0x58/0x1b0 [ 186.755125] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 186.760668] ? __kthread_parkme+0x106/0x1b0 [ 186.765000] kthread+0x35a/0x420 [ 186.768381] ? reset_hung_task_detector+0xd0/0xd0 [ 186.773231] ? kthread_bind+0x40/0x40 [ 186.777044] ret_from_fork+0x3a/0x50 [ 186.781207] Dumping ftrace buffer: [ 186.784769] (ftrace buffer empty) [ 186.788461] Kernel Offset: disabled [ 186.792071] Rebooting in 86400 seconds..