[....] Starting OpenBSD Secure Shell server: sshd[ 18.099423] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.043794] random: sshd: uninitialized urandom read (32 bytes read) [ 23.462648] random: sshd: uninitialized urandom read (32 bytes read) [ 24.355125] random: sshd: uninitialized urandom read (32 bytes read) [ 332.770986] kworker/dying (51) used greatest stack depth: 16504 bytes left [ 643.068804] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. [ 648.515952] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 861.152166] INFO: task syz-executor210:4524 blocked for more than 140 seconds. [ 861.159716] Not tainted 4.18.0-rc5+ #156 [ 861.164347] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 861.172331] syz-executor210 D23528 4524 4521 0x00000004 [ 861.178072] Call Trace: [ 861.180773] __schedule+0x87c/0x1ed0 [ 861.184542] ? __sched_text_start+0x8/0x8 [ 861.188748] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 861.193409] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 861.198556] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 861.203614] ? trace_hardirqs_on+0xd/0x10 [ 861.207781] ? prepare_to_wait_event+0x396/0xc70 [ 861.212584] ? prepare_to_wait_exclusive+0x550/0x550 [ 861.217734] schedule+0xfb/0x450 [ 861.221146] ? __schedule+0x1ed0/0x1ed0 [ 861.225202] ? check_same_owner+0x340/0x340 [ 861.229585] ? do_raw_spin_unlock+0xa7/0x2f0 [ 861.234012] ? replenish_dl_entity.cold.53+0x37/0x37 [ 861.239233] request_wait_answer+0x4c8/0x920 [ 861.243683] ? fuse_read_forget.isra.22+0xdc0/0xdc0 [ 861.248742] ? finish_wait+0x430/0x430 [ 861.252663] ? finish_wait+0x430/0x430 [ 861.256593] ? finish_wait+0x430/0x430 [ 861.260539] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 861.265148] ? fuse_dev_ioctl+0x430/0x430 [ 861.269402] ? kasan_check_write+0x14/0x20 [ 861.273684] ? do_raw_spin_lock+0xc1/0x200 [ 861.277955] __fuse_request_send+0x12a/0x1d0 [ 861.282395] fuse_request_send+0x62/0xa0 [ 861.286492] fuse_simple_request+0x33d/0x730 [ 861.290937] fuse_lookup_name+0x3ee/0x830 [ 861.295108] ? fuse_valid_type+0xb0/0xb0 [ 861.299192] ? mutex_lock_nested+0x16/0x20 [ 861.303467] fuse_lookup+0xf9/0x4c0 [ 861.307111] ? do_raw_spin_unlock+0xa7/0x2f0 [ 861.311561] ? fuse_lookup_name+0x830/0x830 [ 861.315928] ? kasan_check_write+0x14/0x20 [ 861.320196] ? do_raw_spin_lock+0xc1/0x200 [ 861.324537] __lookup_hash+0x12e/0x190 [ 861.328480] filename_create+0x1e5/0x5b0 [ 861.332577] ? kern_path_mountpoint+0x40/0x40 [ 861.337162] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 861.342837] ? getname_flags+0x26e/0x5a0 [ 861.346988] do_mkdirat+0xda/0x310 [ 861.350588] ? __ia32_sys_mknod+0xb0/0xb0 [ 861.354826] ? ksys_mount+0xa8/0x140 [ 861.358575] __x64_sys_mkdirat+0x76/0xb0 [ 861.362756] do_syscall_64+0x1b9/0x820 [ 861.366663] ? finish_task_switch+0x1d3/0x870 [ 861.371186] ? syscall_return_slowpath+0x5e0/0x5e0 [ 861.376131] ? syscall_return_slowpath+0x31d/0x5e0 [ 861.381097] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 861.386476] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 861.391368] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 861.396985] RIP: 0033:0x445849 [ 861.400198] Code: e8 7c b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 861.419500] RSP: 002b:00007fbe78031da8 EFLAGS: 00000293 ORIG_RAX: 0000000000000102 [ 861.427249] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445849 [ 861.434554] RDX: 0000000000000000 RSI: 0000000020000500 RDI: 00000000ffffff9c [ 861.441845] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 861.449144] R10: 0000000000000000 R11: 0000000000000293 R12: 0030656c69662f2e [ 861.456448] R13: 65646f6d746f6f72 R14: 2f30656c69662f2e R15: 0000000000000008 [ 861.463863] INFO: task syz-executor210:4525 blocked for more than 140 seconds. [ 861.471294] Not tainted 4.18.0-rc5+ #156 [ 861.476172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 861.484254] syz-executor210 D25408 4525 4521 0x00000004 [ 861.489920] Call Trace: [ 861.492613] __schedule+0x87c/0x1ed0 [ 861.496368] ? lock_downgrade+0x8f0/0x8f0 [ 861.500548] ? __sched_text_start+0x8/0x8 [ 861.504727] ? print_usage_bug+0xc0/0xc0 [ 861.508815] ? graph_lock+0x170/0x170 [ 861.512632] ? graph_lock+0x170/0x170 [ 861.516468] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 861.521531] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 861.527092] ? __follow_mount_rcu.isra.36.part.37+0x175/0x890 [ 861.533037] schedule+0xfb/0x450 [ 861.536440] ? lock_downgrade+0x8f0/0x8f0 [ 861.540620] ? __schedule+0x1ed0/0x1ed0 [ 861.544618] ? mark_held_locks+0xc9/0x160 [ 861.548808] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 861.553427] ? _raw_spin_unlock_irq+0x27/0x70 [ 861.557961] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 861.563045] __rwsem_down_write_failed_common+0x95d/0x1630 [ 861.568734] ? rwsem_spin_on_owner+0xa40/0xa40 [ 861.573346] ? __lock_acquire+0x7fc/0x5020 [ 861.577632] ? trace_hardirqs_on+0x10/0x10 [ 861.581896] ? find_held_lock+0x36/0x1c0 [ 861.585994] ? find_held_lock+0x36/0x1c0 [ 861.590082] ? lock_downgrade+0x8f0/0x8f0 [ 861.594262] ? kasan_check_read+0x11/0x20 [ 861.598432] ? dput.part.26+0x276/0x7a0 [ 861.602473] ? graph_lock+0x170/0x170 [ 861.606310] ? shrink_dcache_sb+0x350/0x350 [ 861.610667] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 861.615712] ? mntput+0x74/0xa0 [ 861.619043] ? lock_acquire+0x1e4/0x540 [ 861.623050] ? filename_create+0x1b2/0x5b0 [ 861.627308] ? mnt_want_write+0x3f/0xc0 [ 861.631309] ? lock_release+0xa30/0xa30 [ 861.635311] ? check_same_owner+0x340/0x340 [ 861.639658] rwsem_down_write_failed+0xe/0x10 [ 861.644180] ? rwsem_down_write_failed+0xe/0x10 [ 861.648869] call_rwsem_down_write_failed+0x17/0x30 [ 861.653916] down_write_nested+0xae/0x130 [ 861.658076] ? filename_create+0x1b2/0x5b0 [ 861.662338] ? _down_write_nest_lock+0x130/0x130 [ 861.667175] ? __sb_start_write+0x17f/0x300 [ 861.671537] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 861.677104] filename_create+0x1b2/0x5b0 [ 861.681217] ? kern_path_mountpoint+0x40/0x40 [ 861.685747] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 861.691323] ? getname_flags+0x26e/0x5a0 [ 861.695413] do_mkdirat+0xda/0x310 [ 861.698988] ? __ia32_sys_mknod+0xb0/0xb0 [ 861.703159] __x64_sys_mkdirat+0x76/0xb0 [ 861.707256] do_syscall_64+0x1b9/0x820 [ 861.711164] ? syscall_return_slowpath+0x5e0/0x5e0 [ 861.716129] ? syscall_return_slowpath+0x31d/0x5e0 [ 861.721127] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 861.726556] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 861.731449] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 861.736681] RIP: 0033:0x445849 [ 861.739892] Code: e8 7c b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 861.759183] RSP: 002b:00007fbe78010da8 EFLAGS: 00000293 ORIG_RAX: 0000000000000102 [ 861.766937] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445849 [ 861.774261] RDX: 0000000000000000 RSI: 0000000020000500 RDI: 00000000ffffff9c [ 861.781558] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 861.788870] R10: 0000000000000000 R11: 0000000000000293 R12: 0030656c69662f2e [ 861.796778] R13: 65646f6d746f6f72 R14: 2f30656c69662f2e R15: 0000000000000008 [ 861.804098] [ 861.804098] Showing all locks held in the system: [ 861.810455] 1 lock held by khungtaskd/901: [ 861.814721] #0: (____ptrval____) (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 [ 861.823378] 1 lock held by rsyslogd/4404: [ 861.827553] 2 locks held by getty/4494: [ 861.831546] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 861.839839] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 861.848840] 2 locks held by getty/4495: [ 861.852834] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 861.861108] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 861.870025] 2 locks held by getty/4496: [ 861.874022] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 861.882308] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 861.891198] 2 locks held by getty/4497: [ 861.895188] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 861.903453] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 861.912357] 2 locks held by getty/4498: [ 861.916334] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 861.924613] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 861.933503] 2 locks held by getty/4499: [ 861.937494] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 861.945781] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 861.954697] 2 locks held by getty/4500: [ 861.958684] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 861.967056] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 861.976048] 3 locks held by syz-executor210/4524: [ 861.980918] #0: (____ptrval____) (sb_writers#9){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 861.988862] #1: (____ptrval____) (&type->i_mutex_dir_key#3/1){+.+.}, at: filename_create+0x1b2/0x5b0 [ 861.998283] #2: (____ptrval____) (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 [ 862.006134] 2 locks held by syz-executor210/4525: [ 862.011020] #0: (____ptrval____) (sb_writers#9){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 862.018943] #1: (____ptrval____) (&type->i_mutex_dir_key#3/1){+.+.}, at: filename_create+0x1b2/0x5b0 [ 862.028365] [ 862.029997] ============================================= [ 862.029997] [ 862.037053] NMI backtrace for cpu 1 [ 862.040705] CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc5+ #156 [ 862.047615] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 862.056954] Call Trace: [ 862.059585] dump_stack+0x1c9/0x2b4 [ 862.063228] ? dump_stack_print_info.cold.2+0x52/0x52 [ 862.068436] ? vprintk_default+0x28/0x30 [ 862.072495] nmi_cpu_backtrace.cold.4+0x19/0xce [ 862.077184] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 862.081636] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 862.086819] nmi_trigger_cpumask_backtrace+0x151/0x192 [ 862.092078] arch_trigger_cpumask_backtrace+0x14/0x20 [ 862.097275] watchdog+0x9c4/0xf80 [ 862.100720] ? reset_hung_task_detector+0xd0/0xd0 [ 862.105553] ? kasan_check_read+0x11/0x20 [ 862.109683] ? do_raw_spin_unlock+0xa7/0x2f0 [ 862.114164] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 862.119300] ? __kthread_parkme+0x58/0x1b0 [ 862.123519] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 862.128520] ? trace_hardirqs_on+0xd/0x10 [ 862.132676] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 862.138192] ? __kthread_parkme+0x106/0x1b0 [ 862.142505] kthread+0x345/0x410 [ 862.145856] ? reset_hung_task_detector+0xd0/0xd0 [ 862.150687] ? kthread_bind+0x40/0x40 [ 862.154482] ret_from_fork+0x3a/0x50 [ 862.158255] Sending NMI from CPU 1 to CPUs 0: [ 862.162793] NMI backtrace for cpu 0 [ 862.162803] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc5+ #156 [ 862.162807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 862.162821] RIP: 0010:__lock_acquire+0xeec/0x5020 [ 862.162822] Code: 00 48 83 fb 08 0f 84 ee 00 00 00 48 8d 7b 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 11 36 00 00 4c 3b 5b 10 0f 84 3f fb ff ff <48> 8d 8c 24 60 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 [ 862.162918] RSP: 0018:ffff8801dae076d0 EFLAGS: 00000017 [ 862.162925] RAX: dffffc0000000000 RBX: ffffffff89f1a8c8 RCX: 00000000c38e570c [ 862.162930] RDX: 1ffffffff13e351b RSI: 0000000000000000 RDI: ffffffff89f1a8d8 [ 862.162935] RBP: ffff8801dae07a60 R08: 0000000000001e68 R09: 0000000000000000 [ 862.162939] R10: ffffffff88e765f8 R11: 05bc14afc5dd28c2 R12: 1ffff1003b5c0f1e [ 862.162943] R13: 0000000000000000 R14: ffffffff88e75dc0 R15: 0000000000000001 [ 862.162949] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 862.162953] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 862.162957] CR2: ffffffffff600400 CR3: 00000001b0820000 CR4: 00000000001406f0 [ 862.162963] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 862.162967] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 862.162969] Call Trace: [ 862.162971] [ 862.162981] ? lock_downgrade+0x8f0/0x8f0 [ 862.162988] ? graph_lock+0x170/0x170 [ 862.162996] ? trace_hardirqs_on+0x10/0x10 [ 862.163006] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 862.163014] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 862.163021] ? find_held_lock+0x36/0x1c0 [ 862.163030] ? lock_downgrade+0x8f0/0x8f0 [ 862.163042] ? kasan_check_read+0x11/0x20 [ 862.163048] ? rcu_is_watching+0x8c/0x150 [ 862.163054] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 862.163064] ? rebalance_domains+0x379/0xd90 [ 862.163072] lock_acquire+0x1e4/0x540 [ 862.163138] ? tick_irq_enter+0x83/0x390 [ 862.163182] ? hrtimer_update_softirq_timer+0xa0/0xa0 [ 862.163194] ? lock_release+0xa30/0xa30 [ 862.163201] ? find_held_lock+0x36/0x1c0 [ 862.163208] ? graph_lock+0x170/0x170 [ 862.163215] ktime_get+0x14e/0x440 [ 862.163221] ? tick_irq_enter+0x83/0x390 [ 862.163227] ? kasan_check_write+0x14/0x20 [ 862.163233] ? rcu_dynticks_eqs_exit+0x27/0x60 [ 862.163241] ? ktime_get_raw_ts64+0x4f0/0x4f0 [ 862.163247] ? rcu_idle_exit+0x430/0x430 [ 862.163254] tick_irq_enter+0x83/0x390 [ 862.163275] irq_enter+0xb6/0xd0 [ 862.163283] scheduler_ipi+0x3a9/0xa50 [ 862.163290] ? migration_cpu_stop+0x470/0x470 [ 862.163297] ? kasan_check_read+0x11/0x20 [ 862.163302] ? rcu_nmi_exit+0xe0/0x2d0 [ 862.163308] ? rcu_idle_enter+0x480/0x480 [ 862.163315] ? clockevents_program_event+0x140/0x370 [ 862.163328] ? task_prio+0x50/0x50 [ 862.163336] smp_reschedule_interrupt+0xf5/0x670 [ 862.163342] ? smp_thermal_interrupt+0x820/0x820 [ 862.163369] ? kvm_clock_read+0x25/0x30 [ 862.163375] ? kvm_sched_clock_read+0x9/0x20 [ 862.163385] ? sched_clock+0x31/0x40 [ 862.163391] ? sched_clock_cpu+0x1b/0x180 [ 862.163398] ? task_prio+0x50/0x50 [ 862.163408] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 862.163415] reschedule_interrupt+0xf/0x20 [ 862.163417] [ 862.163425] RIP: 0010:native_safe_halt+0x6/0x10 [ 862.163426] Code: c7 48 89 45 d8 e8 aa 7a 27 fa 48 8b 45 d8 e9 d2 fe ff ff 48 89 df e8 99 7a 27 fa eb 8a 90 90 90 90 90 90 90 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 [ 862.163512] RSP: 0018:ffffffff88e07bc0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 [ 862.163519] RAX: dffffc0000000000 RBX: 1ffffffff11c0f7b RCX: 0000000000000000 [ 862.163522] RDX: 1ffffffff11e3618 RSI: 0000000000000001 RDI: ffffffff88f1b0c0 [ 862.163526] RBP: ffffffff88e07bc0 R08: ffffed003b5c46d7 R09: 0000000000000000 [ 862.163530] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 862.163533] R13: ffffffff88e07c78 R14: ffffffff899ecb60 R15: 0000000000000000 [ 862.163542] default_idle+0xc7/0x450 [ 862.163549] ? __sched_text_end+0x3/0x3 [ 862.163554] ? rcu_idle_enter+0x30a/0x480 [ 862.163560] ? rcu_eqs_special_set+0x1b0/0x1b0 [ 862.163568] ? tsc_verify_tsc_adjust+0x109/0x380 [ 862.163576] ? mark_tsc_async_resets+0x20/0x20 [ 862.163581] ? tick_nohz_idle_enter+0x219/0x320 [ 862.163589] arch_cpu_idle+0x10/0x20 [ 862.163595] default_idle_call+0x6d/0x90 [ 862.163600] do_idle+0x3aa/0x570 [ 862.163607] ? arch_cpu_idle_exit+0x70/0x70 [ 862.163613] ? __schedule+0x1ed0/0x1ed0 [ 862.163620] cpu_startup_entry+0x10c/0x120 [ 862.163626] ? cpu_in_idle+0x20/0x20 [ 862.163633] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 862.163639] ? trace_hardirqs_on+0xd/0x10 [ 862.163646] rest_init+0xe1/0xe4 [ 862.163710] start_kernel+0x90e/0x949 [ 862.163717] ? mem_encrypt_init+0xb/0xb [ 862.163724] ? early_idt_handler_common+0x3b/0x60 [ 862.163733] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 862.163740] ? x86_family+0x3e/0x50 [ 862.163747] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 862.163755] x86_64_start_reservations+0x29/0x2b [ 862.163762] x86_64_start_kernel+0x76/0x79 [ 862.163769] secondary_startup_64+0xa5/0xb0 [ 862.163795] Kernel panic - not syncing: hung_task: blocked tasks [ 862.649849] CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc5+ #156 [ 862.656762] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 862.666096] Call Trace: [ 862.668699] dump_stack+0x1c9/0x2b4 [ 862.672317] ? dump_stack_print_info.cold.2+0x52/0x52 [ 862.677499] ? printk_safe_log_store+0x2f0/0x2f0 [ 862.682392] panic+0x238/0x4e7 [ 862.685576] ? add_taint.cold.5+0x16/0x16 [ 862.689706] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 862.695241] ? nmi_trigger_cpumask_backtrace+0x13a/0x192 [ 862.700672] ? printk_safe_flush+0xd7/0x130 [ 862.704990] watchdog+0x9d5/0xf80 [ 862.708441] ? reset_hung_task_detector+0xd0/0xd0 [ 862.713284] ? kasan_check_read+0x11/0x20 [ 862.717426] ? do_raw_spin_unlock+0xa7/0x2f0 [ 862.721842] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 862.726932] ? __kthread_parkme+0x58/0x1b0 [ 862.731153] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 862.736153] ? trace_hardirqs_on+0xd/0x10 [ 862.740298] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 862.745825] ? __kthread_parkme+0x106/0x1b0 [ 862.750131] kthread+0x345/0x410 [ 862.753486] ? reset_hung_task_detector+0xd0/0xd0 [ 862.758318] ? kthread_bind+0x40/0x40 [ 862.762113] ret_from_fork+0x3a/0x50 [ 862.766429] Dumping ftrace buffer: [ 862.770025] (ftrace buffer empty) [ 862.773720] Kernel Offset: disabled [ 862.777352] Rebooting in 86400 seconds..