[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.412595] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.365834] random: sshd: uninitialized urandom read (32 bytes read) [ 23.774457] random: sshd: uninitialized urandom read (32 bytes read) [ 24.659771] random: sshd: uninitialized urandom read (32 bytes read) [ 494.681654] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.51' (ECDSA) to the list of known hosts. [ 500.127380] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/16 10:22:31 parsed 1 programs [ 501.881270] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/16 10:22:34 executed programs: 0 [ 503.263106] IPVS: ftp: loaded support on port[0] = 21 [ 717.791193] INFO: task syz-executor0:4594 blocked for more than 140 seconds. [ 717.798570] Not tainted 4.18.0-rc5+ #52 [ 717.803132] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.811141] syz-executor0 D23464 4594 4576 0x20020004 [ 717.816889] Call Trace: [ 717.819536] __schedule+0x87c/0x1ed0 [ 717.823314] ? __sched_text_start+0x8/0x8 [ 717.827488] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 717.832165] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 717.837331] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 717.842387] ? trace_hardirqs_on+0xd/0x10 [ 717.846561] ? prepare_to_wait_event+0x396/0xc70 [ 717.851362] ? prepare_to_wait_exclusive+0x550/0x550 [ 717.856511] schedule+0xfb/0x450 [ 717.859909] ? __schedule+0x1ed0/0x1ed0 [ 717.863915] ? check_same_owner+0x340/0x340 [ 717.868286] ? do_raw_spin_unlock+0xa7/0x2f0 [ 717.872715] ? replenish_dl_entity.cold.53+0x37/0x37 [ 717.877874] request_wait_answer+0x4c8/0x920 [ 717.882337] ? fuse_read_forget.isra.22+0xdc0/0xdc0 [ 717.887404] ? finish_wait+0x430/0x430 [ 717.891334] ? finish_wait+0x430/0x430 [ 717.895267] ? finish_wait+0x430/0x430 [ 717.899180] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 717.903801] ? fuse_dev_ioctl+0x430/0x430 [ 717.907983] ? kasan_check_write+0x14/0x20 [ 717.912266] ? do_raw_spin_lock+0xc1/0x200 [ 717.916542] __fuse_request_send+0x12a/0x1d0 [ 717.921040] fuse_request_send+0x62/0xa0 [ 717.925133] fuse_simple_request+0x33d/0x730 [ 717.929574] fuse_lookup_name+0x3ee/0x830 [ 717.933766] ? fuse_valid_type+0xb0/0xb0 [ 717.937884] ? mutex_lock_nested+0x16/0x20 [ 717.942160] fuse_lookup+0xf9/0x4c0 [ 717.945833] ? do_raw_spin_unlock+0xa7/0x2f0 [ 717.950284] ? fuse_lookup_name+0x830/0x830 [ 717.954647] ? kasan_check_write+0x14/0x20 [ 717.958905] ? do_raw_spin_lock+0xc1/0x200 [ 717.963196] __lookup_hash+0x12e/0x190 [ 717.967113] filename_create+0x1e5/0x5b0 [ 717.971219] ? kern_path_mountpoint+0x40/0x40 [ 717.975755] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 717.981346] ? getname_flags+0x26e/0x5a0 [ 717.985452] do_mkdirat+0xda/0x310 [ 717.989034] ? __ia32_sys_mknod+0xb0/0xb0 [ 717.993217] ? syscall_slow_exit_work+0x500/0x500 [ 717.998104] __ia32_sys_mkdirat+0x74/0xb0 [ 718.002278] do_fast_syscall_32+0x34d/0xfb2 [ 718.006648] ? do_int80_syscall_32+0x890/0x890 [ 718.011261] ? _raw_spin_unlock_irq+0x27/0x70 [ 718.015798] ? finish_task_switch+0x1d3/0x870 [ 718.020313] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 718.025885] ? syscall_return_slowpath+0x31d/0x5e0 [ 718.030856] ? sysret32_from_system_call+0x5/0x46 [ 718.035748] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 718.040639] entry_SYSENTER_compat+0x70/0x7f [ 718.045087] RIP: 0023:0xf7f59cb9 [ 718.048473] Code: Bad RIP value. [ 718.051883] RSP: 002b:00000000f7f550ac EFLAGS: 00000282 ORIG_RAX: 0000000000000128 [ 718.059631] RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000500 [ 718.066933] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 718.074249] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 718.081572] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 718.088882] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 718.096211] INFO: task syz-executor0:4596 blocked for more than 140 seconds. [ 718.103437] Not tainted 4.18.0-rc5+ #52 [ 718.107974] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 718.115972] syz-executor0 D23120 4596 4576 0x20020004 [ 718.121648] Call Trace: [ 718.124267] __schedule+0x87c/0x1ed0 [ 718.128032] ? lock_downgrade+0x8f0/0x8f0 [ 718.132207] ? __sched_text_start+0x8/0x8 [ 718.136387] ? print_usage_bug+0xc0/0xc0 [ 718.140481] ? graph_lock+0x170/0x170 [ 718.144316] ? graph_lock+0x170/0x170 [ 718.148138] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 718.153198] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 718.158760] schedule+0xfb/0x450 [ 718.162168] ? lock_downgrade+0x8f0/0x8f0 [ 718.166329] ? __schedule+0x1ed0/0x1ed0 [ 718.170423] ? mark_held_locks+0xc9/0x160 [ 718.174583] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 718.179219] ? _raw_spin_unlock_irq+0x27/0x70 [ 718.183740] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 718.188789] __rwsem_down_write_failed_common+0x95d/0x1630 [ 718.194445] ? rwsem_spin_on_owner+0xa40/0xa40 [ 718.199070] ? __lock_acquire+0x7fc/0x5020 [ 718.203337] ? trace_hardirqs_on+0x10/0x10 [ 718.207613] ? find_held_lock+0x36/0x1c0 [ 718.211700] ? find_held_lock+0x36/0x1c0 [ 718.215797] ? lock_downgrade+0x8f0/0x8f0 [ 718.219993] ? kasan_check_read+0x11/0x20 [ 718.224160] ? dput.part.26+0x276/0x7a0 [ 718.228143] ? graph_lock+0x170/0x170 [ 718.231956] ? shrink_dcache_sb+0x350/0x350 [ 718.236297] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 718.241343] ? mntput+0x74/0xa0 [ 718.244635] ? lock_acquire+0x1e4/0x540 [ 718.248641] ? filename_create+0x1b2/0x5b0 [ 718.252891] ? mnt_want_write+0x3f/0xc0 [ 718.256894] ? lock_release+0xa30/0xa30 [ 718.260888] ? check_same_owner+0x340/0x340 [ 718.265247] rwsem_down_write_failed+0xe/0x10 [ 718.269758] ? rwsem_down_write_failed+0xe/0x10 [ 718.274457] call_rwsem_down_write_failed+0x17/0x30 [ 718.279505] down_write_nested+0xae/0x130 [ 718.283846] ? filename_create+0x1b2/0x5b0 [ 718.288186] ? _down_write_nest_lock+0x130/0x130 [ 718.292971] ? __sb_start_write+0x17f/0x300 [ 718.297320] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 718.302892] filename_create+0x1b2/0x5b0 [ 718.306980] ? kern_path_mountpoint+0x40/0x40 [ 718.311514] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 718.317078] ? getname_flags+0x26e/0x5a0 [ 718.321177] do_mkdirat+0xda/0x310 [ 718.324731] ? __ia32_sys_mknod+0xb0/0xb0 [ 718.328923] __ia32_sys_mkdirat+0x74/0xb0 [ 718.333095] do_fast_syscall_32+0x34d/0xfb2 [ 718.337445] ? do_int80_syscall_32+0x890/0x890 [ 718.342675] ? kasan_check_write+0x14/0x20 [ 718.346945] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 718.352527] ? syscall_return_slowpath+0x31d/0x5e0 [ 718.357508] ? sysret32_from_system_call+0x5/0x46 [ 718.362379] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 718.367265] entry_SYSENTER_compat+0x70/0x7f [ 718.371684] RIP: 0023:0xf7f59cb9 [ 718.375068] Code: Bad RIP value. [ 718.378463] RSP: 002b:00000000f7f340ac EFLAGS: 00000282 ORIG_RAX: 0000000000000128 [ 718.386209] RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000500 [ 718.393517] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 718.400906] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 718.408209] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 718.415511] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 718.422819] [ 718.422819] Showing all locks held in the system: [ 718.429181] 1 lock held by khungtaskd/901: [ 718.433429] #0: (____ptrval____) (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 [ 718.442144] 1 lock held by rsyslogd/4441: [ 718.446429] #0: (____ptrval____) (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 718.454471] 2 locks held by getty/4531: [ 718.458461] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 718.466756] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 718.475645] 2 locks held by getty/4532: [ 718.479642] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 718.487914] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 718.496809] 2 locks held by getty/4533: [ 718.500795] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 718.509167] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 718.518061] 2 locks held by getty/4534: [ 718.522047] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 718.530305] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 718.539193] 2 locks held by getty/4535: [ 718.543184] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 718.551484] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 718.561258] 2 locks held by getty/4536: [ 718.565253] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 718.573519] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 718.582581] 2 locks held by getty/4537: [ 718.586574] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 718.594866] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 718.603764] 3 locks held by syz-executor0/4594: [ 718.608463] #0: (____ptrval____) (sb_writers#13){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 718.616484] #1: (____ptrval____) (&type->i_mutex_dir_key#5/1){+.+.}, at: filename_create+0x1b2/0x5b0 [ 718.625986] #2: (____ptrval____) (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 [ 718.633843] 2 locks held by syz-executor0/4596: [ 718.638541] #0: (____ptrval____) (sb_writers#13){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 718.646547] #1: (____ptrval____) (&type->i_mutex_dir_key#5/1){+.+.}, at: filename_create+0x1b2/0x5b0 [ 718.656052] [ 718.657692] ============================================= [ 718.657692] [ 718.664742] NMI backtrace for cpu 1 [ 718.668383] CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc5+ #52 [ 718.675213] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.684560] Call Trace: [ 718.687213] dump_stack+0x1c9/0x2b4 [ 718.690826] ? dump_stack_print_info.cold.2+0x52/0x52 [ 718.695994] ? vprintk_default+0x28/0x30 [ 718.700039] nmi_cpu_backtrace.cold.4+0x19/0xce [ 718.704694] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 718.709103] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 718.714272] nmi_trigger_cpumask_backtrace+0x151/0x192 [ 718.719537] arch_trigger_cpumask_backtrace+0x14/0x20 [ 718.724711] watchdog+0x9c4/0xf80 [ 718.728146] ? reset_hung_task_detector+0xd0/0xd0 [ 718.732973] ? kasan_check_read+0x11/0x20 [ 718.737101] ? do_raw_spin_unlock+0xa7/0x2f0 [ 718.741494] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 718.746575] ? __kthread_parkme+0x58/0x1b0 [ 718.750800] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 718.755800] ? trace_hardirqs_on+0xd/0x10 [ 718.759931] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 718.765447] ? __kthread_parkme+0x106/0x1b0 [ 718.769750] kthread+0x345/0x410 [ 718.773097] ? reset_hung_task_detector+0xd0/0xd0 [ 718.777923] ? kthread_bind+0x40/0x40 [ 718.781703] ret_from_fork+0x3a/0x50 [ 718.785486] Sending NMI from CPU 1 to CPUs 0: [ 718.790031] NMI backtrace for cpu 0 [ 718.790041] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc5+ #52 [ 718.790045] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.790060] RIP: 0010:load_balance+0x719/0x3640 [ 718.790061] Code: 0f b6 14 22 38 95 a8 fc ff ff 7c 08 84 d2 0f 85 45 23 00 00 3b 05 4b 49 45 08 0f 83 4b 02 00 00 48 63 c8 48 c7 c2 c0 c9 02 00 <48> 8d 3c cd 60 1e d1 88 48 89 d3 48 89 fe 48 c1 ee 03 42 80 3c 26 [ 718.790149] RSP: 0018:ffff8801dae071e0 EFLAGS: 00000297 [ 718.790155] RAX: 0000000000000001 RBX: ffffed003b5c0e71 RCX: 0000000000000001 [ 718.790159] RDX: 000000000002c9c0 RSI: ffffffff835e2755 RDI: 0000000000000007 [ 718.790163] RBP: ffff8801dae075d8 R08: ffffffff88e75dc0 R09: 1ffff1003b5c0e19 [ 718.790167] R10: ffff8801dae06e30 R11: 00000000000014dc R12: dffffc0000000000 [ 718.790171] R13: ffff8801dae075b0 R14: ffff8801dae07350 R15: 0000000000000000 [ 718.790177] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 718.790181] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.790185] CR2: ffffffffff600400 CR3: 00000001b03b3000 CR4: 00000000001406f0 [ 718.790191] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.790195] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.790197] Call Trace: [ 718.790199] [ 718.790210] ? graph_lock+0x170/0x170 [ 718.790219] ? print_usage_bug+0xc0/0xc0 [ 718.790225] ? graph_lock+0x170/0x170 [ 718.790233] ? find_busiest_group+0x1cb0/0x1cb0 [ 718.790258] ? lock_downgrade+0x8f0/0x8f0 [ 718.790270] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 718.790278] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 718.790285] ? trace_hardirqs_on+0xd/0x10 [ 718.790292] ? update_blocked_averages+0xcee/0x1770 [ 718.790300] ? graph_lock+0x170/0x170 [ 718.790306] ? graph_lock+0x170/0x170 [ 718.790313] ? lock_acquire+0x1e4/0x540 [ 718.790319] ? rebalance_domains+0x135/0xd90 [ 718.790328] ? __lock_is_held+0xb5/0x140 [ 718.790336] rebalance_domains+0x82a/0xd90 [ 718.790346] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 718.790354] ? load_balance+0x3640/0x3640 [ 718.790361] ? print_usage_bug+0xc0/0xc0 [ 718.790368] ? __lock_acquire+0x7fc/0x5020 [ 718.790376] ? graph_lock+0x170/0x170 [ 718.790383] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 718.790391] ? find_next_bit+0x104/0x130 [ 718.790399] _nohz_idle_balance+0x636/0x820 [ 718.790406] ? mark_held_locks+0xc9/0x160 [ 718.790413] ? print_usage_bug+0xc0/0xc0 [ 718.790420] ? rebalance_domains+0xd90/0xd90 [ 718.790427] ? trace_hardirqs_on+0xd/0x10 [ 718.790434] ? lock_downgrade+0x8f0/0x8f0 [ 718.790441] ? rcu_barrier_sched+0x10/0x10 [ 718.790449] ? __lock_is_held+0xb5/0x140 [ 718.790456] ? graph_lock+0x170/0x170 [ 718.790464] ? rcu_read_lock_sched_held+0x108/0x120 [ 718.790470] ? rcu_process_callbacks+0x1251/0x1850 [ 718.790478] run_rebalance_domains+0x2c6/0x4c0 [ 718.790486] ? _nohz_idle_balance+0x820/0x820 [ 718.790491] ? rcu_is_watching+0x8c/0x150 [ 718.790496] ? rcu_pm_notify+0xc0/0xc0 [ 718.790504] __do_softirq+0x2e8/0xb17 [ 718.790512] ? __irqentry_text_end+0x1f97a8/0x1f97a8 [ 718.790517] ? rcu_is_watching+0x8c/0x150 [ 718.790523] ? rcu_pm_notify+0xc0/0xc0 [ 718.790529] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 718.790538] ? rcu_read_lock_sched_held+0x108/0x120 [ 718.790546] ? raise_softirq_irqoff+0x286/0x330 [ 718.790551] ? irq_exit+0x200/0x200 [ 718.790558] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 718.790567] ? sched_set_stop_task+0x290/0x290 [ 718.790574] irq_exit+0x1d1/0x200 [ 718.790581] scheduler_ipi+0x53c/0xa50 [ 718.790588] ? migration_cpu_stop+0x470/0x470 [ 718.790596] ? kasan_check_read+0x11/0x20 [ 718.790602] ? rcu_nmi_exit+0xe0/0x2d0 [ 718.790607] ? rcu_idle_enter+0x480/0x480 [ 718.790615] ? clockevents_program_event+0x140/0x370 [ 718.790623] ? task_prio+0x50/0x50 [ 718.790631] smp_reschedule_interrupt+0xf5/0x670 [ 718.790637] ? smp_thermal_interrupt+0x820/0x820 [ 718.790645] ? _raw_spin_unlock+0x22/0x30 [ 718.790652] ? handle_edge_irq+0x330/0x870 [ 718.790658] ? task_prio+0x50/0x50 [ 718.790668] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 718.790675] reschedule_interrupt+0xf/0x20 [ 718.790677] [ 718.790685] RIP: 0010:native_safe_halt+0x6/0x10 [ 718.790686] Code: c7 48 89 45 d8 e8 da f3 25 fa 48 8b 45 d8 e9 d2 fe ff ff 48 89 df e8 c9 f3 25 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 [ 718.790773] RSP: 0018:ffffffff88e07bc0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 [ 718.790779] RAX: dffffc0000000000 RBX: 1ffffffff11c0f7b RCX: 0000000000000000 [ 718.790782] RDX: 1ffffffff11e3610 RSI: 0000000000000001 RDI: ffffffff88f1b080 [ 718.790786] RBP: ffffffff88e07bc0 R08: ffffed003b5c46d7 R09: 0000000000000000 [ 718.790790] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 718.790793] R13: ffffffff88e07c78 R14: ffffffff899ed160 R15: 0000000000000000 [ 718.790803] default_idle+0xc7/0x450 [ 718.790809] ? __sched_text_end+0x3/0x3 [ 718.790815] ? rcu_idle_enter+0x30a/0x480 [ 718.790821] ? rcu_eqs_special_set+0x1b0/0x1b0 [ 718.790830] ? tsc_verify_tsc_adjust+0x109/0x380 [ 718.790837] ? mark_tsc_async_resets+0x20/0x20 [ 718.790842] ? tick_nohz_idle_enter+0x219/0x320 [ 718.790851] arch_cpu_idle+0x10/0x20 [ 718.790857] default_idle_call+0x6d/0x90 [ 718.790863] do_idle+0x3aa/0x570 [ 718.790870] ? retint_kernel+0x10/0x10 [ 718.790876] ? arch_cpu_idle_exit+0x70/0x70 [ 718.790883] cpu_startup_entry+0x10c/0x120 [ 718.790889] ? cpu_in_idle+0x20/0x20 [ 718.790896] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 718.790903] ? trace_hardirqs_on+0xd/0x10 [ 718.790910] rest_init+0xe1/0xe4 [ 718.790983] start_kernel+0x90e/0x949 [ 718.790989] ? mem_encrypt_init+0xb/0xb [ 718.791003] ? early_idt_handler_common+0x3b/0x60 [ 718.791011] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 718.791019] ? x86_family+0x3e/0x50 [ 718.791027] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 718.791035] x86_64_start_reservations+0x29/0x2b [ 718.791042] x86_64_start_kernel+0x76/0x79 [ 718.791049] secondary_startup_64+0xa5/0xb0 [ 718.791182] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.028 msecs [ 718.792042] Kernel panic - not syncing: hung_task: blocked tasks [ 719.378302] CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc5+ #52 [ 719.385119] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 719.394454] Call Trace: [ 719.397030] dump_stack+0x1c9/0x2b4 [ 719.400638] ? dump_stack_print_info.cold.2+0x52/0x52 [ 719.405813] ? printk_safe_log_store+0x2f0/0x2f0 [ 719.410554] panic+0x238/0x4e7 [ 719.413729] ? add_taint.cold.5+0x16/0x16 [ 719.417862] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 719.423383] ? nmi_trigger_cpumask_backtrace+0x13a/0x192 [ 719.428818] ? printk_safe_flush+0xd7/0x130 [ 719.433127] watchdog+0x9d5/0xf80 [ 719.436576] ? reset_hung_task_detector+0xd0/0xd0 [ 719.441420] ? kasan_check_read+0x11/0x20 [ 719.445550] ? do_raw_spin_unlock+0xa7/0x2f0 [ 719.449942] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 719.455029] ? __kthread_parkme+0x58/0x1b0 [ 719.459260] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 719.464259] ? trace_hardirqs_on+0xd/0x10 [ 719.468393] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 719.473916] ? __kthread_parkme+0x106/0x1b0 [ 719.478225] kthread+0x345/0x410 [ 719.481576] ? reset_hung_task_detector+0xd0/0xd0 [ 719.486413] ? kthread_bind+0x40/0x40 [ 719.490199] ret_from_fork+0x3a/0x50 [ 719.494501] Dumping ftrace buffer: [ 719.498083] (ftrace buffer empty) [ 719.501772] Kernel Offset: disabled [ 719.505384] Rebooting in 86400 seconds..