[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 58.885733][ T26] audit: type=1800 audit(1572233691.993:25): pid=8532 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[ 58.910290][ T26] audit: type=1800 audit(1572233691.993:26): pid=8532 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[ 58.955139][ T26] audit: type=1800 audit(1572233691.993:27): pid=8532 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.1.31' (ECDSA) to the list of known hosts.
syzkaller login: [ 239.339417][ T803] INFO: task kworker/u4:0:7 blocked for more than 143 seconds.
[ 239.347150][ T803] Not tainted 5.4.0-rc4-next-20191025 #0
[ 239.353386][ T803] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 239.362365][ T803] kworker/u4:0 D24344 7 2 0x80004000
[ 239.368729][ T803] Workqueue: writeback wb_workfn (flush-8:0)
[ 239.374766][ T803] Call Trace:
[ 239.382663][ T803] __schedule+0x94a/0x1e70
[ 239.387138][ T803] ? __sched_text_start+0x8/0x8
[ 239.392055][ T803] ? blk_insert_cloned_request+0x530/0x530
[ 239.398062][ T803] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 239.405402][ T803] ? kthread_data+0x58/0xc0
[ 239.410005][ T803] schedule+0xdc/0x2b0
[ 239.414245][ T803] io_schedule+0x1c/0x70
[ 239.418500][ T803] __lock_page+0x422/0xab0
[ 239.422977][ T803] ? wait_on_page_bit+0xa60/0xa60
[ 239.428204][ T803] ? page_cache_next_miss+0x340/0x340
[ 239.433651][ T803] ? ___might_sleep+0x163/0x2c0
[ 239.438705][ T803] ? __might_sleep+0x95/0x190
[ 239.443442][ T803] mpage_prepare_extent_to_map+0xb3f/0xf90
[ 239.449580][ T803] ? mpage_process_page_bufs+0x780/0x780
[ 239.455213][ T803] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 239.460822][ T803] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 239.466991][ T803] ? kmem_cache_alloc_node_trace+0x4ef/0x750
[ 239.473078][ T803] ext4_writepages+0x954/0x2e70
[ 239.478150][ T803] ? ___might_sleep+0x163/0x2c0
[ 239.483074][ T803] ? __might_sleep+0x80/0x190
[ 239.487950][ T803] ? print_usage_bug+0xb1/0xd0
[ 239.492897][ T803] ? ext4_mark_inode_dirty+0x9b0/0x9b0
[ 239.498567][ T803] ? __kasan_check_read+0x11/0x20
[ 239.503654][ T803] ? __lock_acquire+0x16f2/0x4a00
[ 239.508856][ T803] ? __kasan_check_read+0x11/0x20
[ 239.513981][ T803] ? mark_lock+0xc2/0x1220
[ 239.518583][ T803] ? mark_held_locks+0xf0/0xf0
[ 239.523399][ T803] ? __kasan_check_read+0x11/0x20
[ 239.528599][ T803] ? ext4_mark_inode_dirty+0x9b0/0x9b0
[ 239.534975][ T803] do_writepages+0xfa/0x2a0
[ 239.539541][ T803] ? do_writepages+0xfa/0x2a0
[ 239.544385][ T803] ? page_writeback_cpu_online+0x20/0x20
[ 239.550084][ T803] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 239.556424][ T803] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 239.562023][ T803] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 239.568196][ T803] __writeback_single_inode+0x136/0x1400
[ 239.573939][ T803] ? _raw_spin_unlock+0x28/0x40
[ 239.578801][ T803] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 239.585091][ T803] ? wbc_attach_and_unlock_inode+0x5bf/0x920
[ 239.591136][ T803] writeback_sb_inodes+0x596/0xf20
[ 239.596265][ T803] ? __writeback_single_inode+0x1400/0x1400
[ 239.602244][ T803] ? trylock_super+0x22/0x110
[ 239.606944][ T803] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 239.613263][ T803] __writeback_inodes_wb+0xc3/0x260
[ 239.618527][ T803] wb_writeback+0x910/0xd90
[ 239.623074][ T803] ? mark_lock+0xc2/0x1220
[ 239.627500][ T803] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0
[ 239.633905][ T803] ? __sanitizer_cov_trace_cmp8+0x18/0x20
[ 239.639678][ T803] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 239.645389][ T803] ? get_nr_dirty_inodes+0xe2/0x140
[ 239.650638][ T803] wb_workfn+0xba5/0x1220
[ 239.654984][ T803] ? inode_wait_for_writeback+0x40/0x40
[ 239.661327][ T803] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 239.667499][ T803] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 239.673553][ T803] ? trace_hardirqs_on+0x67/0x240
[ 239.678583][ T803] process_one_work+0x9af/0x1740
[ 239.683588][ T803] ? pwq_dec_nr_in_flight+0x320/0x320
[ 239.688965][ T803] ? lock_acquire+0x190/0x410
[ 239.693721][ T803] worker_thread+0x98/0xe40
[ 239.698254][ T803] kthread+0x361/0x430
[ 239.702376][ T803] ? process_one_work+0x1740/0x1740
[ 239.707582][ T803] ? kthread_mod_delayed_work+0x1f0/0x1f0
[ 239.713368][ T803] ret_from_fork+0x24/0x30
[ 239.717818][ T803] INFO: task khugepaged:1088 blocked for more than 143 seconds.
[ 239.725495][ T803] Not tainted 5.4.0-rc4-next-20191025 #0
[ 239.731792][ T803] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 239.740502][ T803] khugepaged D27488 1088 2 0x80004000
[ 239.746847][ T803] Call Trace:
[ 239.750206][ T803] __schedule+0x94a/0x1e70
[ 239.754692][ T803] ? __sched_text_start+0x8/0x8
[ 239.759605][ T803] ? blk_insert_cloned_request+0x530/0x530
[ 239.765420][ T803] ? _raw_spin_unlock_irq+0x23/0x80
[ 239.770694][ T803] ? __lock_page+0x3d9/0xab0
[ 239.775285][ T803] ? _raw_spin_unlock_irq+0x23/0x80
[ 239.780529][ T803] schedule+0xdc/0x2b0
[ 239.784981][ T803] io_schedule+0x1c/0x70
[ 239.789215][ T803] __lock_page+0x422/0xab0
[ 239.794424][ T803] ? wait_on_page_bit+0xa60/0xa60
[ 239.799508][ T803] ? page_cache_next_miss+0x340/0x340
[ 239.804882][ T803] ? ___might_sleep+0x163/0x2c0
[ 239.809814][ T803] ? __might_sleep+0x95/0x190
[ 239.814496][ T803] mpage_prepare_extent_to_map+0xb3f/0xf90
[ 239.820359][ T803] ? mpage_process_page_bufs+0x780/0x780
[ 239.826032][ T803] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 239.832099][ T803] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 239.838351][ T803] ext4_writepages+0xb6a/0x2e70
[ 239.843315][ T803] ? __this_cpu_preempt_check+0x2c/0x190
[ 239.848968][ T803] ? retint_kernel+0x2b/0x2b
[ 239.853640][ T803] ? ext4_mark_inode_dirty+0x9b0/0x9b0
[ 239.859102][ T803] ? 0xffffffff81000000
[ 239.863337][ T803] ? mark_lock+0xc2/0x1220
[ 239.867773][ T803] ? prep_new_page+0x19f/0x200
[ 239.872621][ T803] ? wbc_attach_and_unlock_inode+0x515/0x920
[ 239.878614][ T803] ? find_held_lock+0x35/0x130
[ 239.883443][ T803] ? wbc_attach_and_unlock_inode+0x515/0x920
[ 239.889486][ T803] ? ext4_mark_inode_dirty+0x9b0/0x9b0
[ 239.894937][ T803] do_writepages+0xfa/0x2a0
[ 239.899476][ T803] ? do_writepages+0xfa/0x2a0
[ 239.904160][ T803] ? lock_downgrade+0x920/0x920
[ 239.909007][ T803] ? page_writeback_cpu_online+0x20/0x20
[ 239.914691][ T803] ? __kasan_check_read+0x11/0x20
[ 239.920423][ T803] ? do_raw_spin_unlock+0x57/0x270
[ 239.925539][ T803] ? _raw_spin_unlock+0x28/0x40
[ 239.930541][ T803] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 239.936789][ T803] ? wbc_attach_and_unlock_inode+0x5bf/0x920
[ 239.942828][ T803] __filemap_fdatawrite_range+0x2bc/0x3b0
[ 239.948561][ T803] ? delete_from_page_cache_batch+0xfe0/0xfe0
[ 239.954690][ T803] ? lockdep_hardirqs_on+0x421/0x5e0
[ 239.960027][ T803] filemap_flush+0x24/0x30
[ 239.964443][ T803] collapse_file+0x36b1/0x41a0
[ 239.969193][ T803] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 239.975432][ T803] ? khugepaged+0x21d0/0x4360
[ 239.980159][ T803] ? trace_event_raw_event_mm_collapse_huge_page_isolate+0x370/0x370
[ 239.988217][ T803] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 239.993992][ T803] ? khugepaged_find_target_node+0x142/0x180
[ 240.000046][ T803] khugepaged+0x2da9/0x4360
[ 240.004545][ T803] ? __kasan_check_read+0x11/0x20
[ 240.009628][ T803] ? __lock_acquire+0x16f2/0x4a00
[ 240.014679][ T803] ? _raw_spin_unlock_irq+0x23/0x80
[ 240.019926][ T803] ? finish_task_switch+0x147/0x750
[ 240.025130][ T803] ? _raw_spin_unlock_irq+0x23/0x80
[ 240.030429][ T803] ? lockdep_hardirqs_on+0x421/0x5e0
[ 240.035732][ T803] ? collapse_pte_mapped_thp+0xbe0/0xbe0
[ 240.041441][ T803] ? lock_downgrade+0x920/0x920
[ 240.046324][ T803] ? finish_wait+0x260/0x260
[ 240.051728][ T803] ? lockdep_hardirqs_on+0x421/0x5e0
[ 240.057018][ T803] ? trace_hardirqs_on+0x67/0x240
[ 240.062096][ T803] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 240.068344][ T803] ? __kthread_parkme+0x108/0x1c0
[ 240.073444][ T803] ? __kasan_check_read+0x11/0x20
[ 240.078483][ T803] kthread+0x361/0x430
[ 240.082606][ T803] ? collapse_pte_mapped_thp+0xbe0/0xbe0
[ 240.088248][ T803] ? kthread_mod_delayed_work+0x1f0/0x1f0
[ 240.094043][ T803] ret_from_fork+0x24/0x30
[ 240.098538][ T803]
[ 240.098538][ T803] Showing all locks held in the system:
[ 240.106321][ T803] 4 locks held by kworker/u4:0/7:
[ 240.111399][ T803] #0: ffff8880a7876128 ((wq_completion)writeback){+.+.}, at: process_one_work+0x88b/0x1740
[ 240.121608][ T803] #1: ffff8880a988fdc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x8c1/0x1740
[ 240.132990][ T803] #2: ffff8882155700d8 (&type->s_umount_key#32){++++}, at: trylock_super+0x22/0x110
[ 240.142527][ T803] #3: ffff888215572990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0
[ 240.152426][ T803] 1 lock held by khungtaskd/803:
[ 240.157355][ T803] #0: ffffffff88faba80 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279
[ 240.166743][ T803] 1 lock held by khugepaged/1088:
[ 240.172070][ T803] #0: ffff888215572990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0
[ 240.182697][ T803] 1 lock held by rsyslogd/8570:
[ 240.187545][ T803] #0: ffff8880a76081a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 240.196217][ T803] 2 locks held by getty/8660:
[ 240.200921][ T803] #0: ffff8880a7ec2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 240.210059][ T803] #1: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0
[ 240.219745][ T803] 2 locks held by getty/8661:
[ 240.224401][ T803] #0: ffff8880996ee090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 240.233446][ T803] #1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0
[ 240.243082][ T803] 2 locks held by getty/8662:
[ 240.249888][ T803] #0: ffff8880a287d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 240.258854][ T803] #1: ffffc90005f412e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0
[ 240.268455][ T803] 2 locks held by getty/8663:
[ 240.273177][ T803] #0: ffff88809f47e090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 240.282179][ T803] #1: ffffc90005f312e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0
[ 240.291812][ T803] 2 locks held by getty/8664:
[ 240.296494][ T803] #0: ffff8880a8fc5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 240.305502][ T803] #1: ffffc90005f3d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0
[ 240.315815][ T803] 2 locks held by getty/8665:
[ 240.320524][ T803] #0: ffff8880a1d6c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 240.329534][ T803] #1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0
[ 240.339106][ T803] 2 locks held by getty/8666:
[ 240.343823][ T803] #0: ffff8880994eb090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 240.352823][ T803] #1: ffffc90005f112e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0
[ 240.362445][ T803] 1 lock held by syz-execprog/8693:
[ 240.367641][ T803] #0: ffff8880906a03a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2
[ 240.376913][ T803]
[ 240.379245][ T803] =============================================
[ 240.379245][ T803]
[ 240.387700][ T803] NMI backtrace for cpu 1
[ 240.392087][ T803] CPU: 1 PID: 803 Comm: khungtaskd Not tainted 5.4.0-rc4-next-20191025 #0
[ 240.400577][ T803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 240.410617][ T803] Call Trace:
[ 240.413904][ T803] dump_stack+0x172/0x1f0
[ 240.418228][ T803] nmi_cpu_backtrace.cold+0x70/0xb2
[ 240.423416][ T803] ? vprintk_func+0x86/0x189
[ 240.428006][ T803] ? lapic_can_unplug_cpu.cold+0x3a/0x3a
[ 240.433634][ T803] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 240.439719][ T803] arch_trigger_cpumask_backtrace+0x14/0x20
[ 240.445601][ T803] watchdog+0xc8f/0x1350
[ 240.449849][ T803] kthread+0x361/0x430
[ 240.453904][ T803] ? reset_hung_task_detector+0x30/0x30
[ 240.459433][ T803] ? kthread_mod_delayed_work+0x1f0/0x1f0
[ 240.465134][ T803] ret_from_fork+0x24/0x30
[ 240.469816][ T803] Sending NMI from CPU 1 to CPUs 0:
[ 240.475515][ C0] NMI backtrace for cpu 0
[ 240.475521][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc4-next-20191025 #0
[ 240.475526][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 240.475530][ C0] RIP: 0010:lock_release+0x218/0x960
[ 240.475540][ C0] Code: 8b 35 50 cc 6e 08 85 f6 0f 84 47 02 00 00 4d 8d 8f 98 08 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ca 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e 22 06 00 00 45 8b 87 98 08 00 00 45 85 c0
[ 240.475543][ C0] RSP: 0018:ffff8880ae809e28 EFLAGS: 00000806
[ 240.475550][ C0] RAX: 0000000000000000 RBX: 1ffff11015d013ca RCX: 1ffffffff1390b56
[ 240.475555][ C0] RDX: 1ffffffff11cf54b RSI: 0000000000000001 RDI: ffffffff88e7aa5c
[ 240.475559][ C0] RBP: ffff8880ae809ef8 R08: 1ffffffff1390518 R09: ffffffff88e7aa58
[ 240.475564][ C0] R10: fffffbfff1390518 R11: ffffffff89c828c7 R12: ffffffff88fbaa08
[ 240.475568][ C0] R13: ffffffff81675fd5 R14: ffff8880ae809ed0 R15: ffffffff88e7a1c0
[ 240.475573][ C0] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[ 240.475577][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 240.475582][ C0] CR2: 0000000002609000 CR3: 00000000a0933000 CR4: 00000000001406f0
[ 240.475586][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 240.475590][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 240.475593][ C0] Call Trace:
[ 240.475595][ C0]
[ 240.475599][ C0] ? lock_downgrade+0x920/0x920
[ 240.475602][ C0] ? lock_acquire+0x190/0x410
[ 240.475605][ C0] ? tick_irq_enter+0xb5/0x3f0
[ 240.475608][ C0] ktime_get+0xe2/0x2f0
[ 240.475611][ C0] ? tick_irq_enter+0xb5/0x3f0
[ 240.475615][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 240.475618][ C0] tick_irq_enter+0xb5/0x3f0
[ 240.475621][ C0] irq_enter+0xbd/0xe0
[ 240.475625][ C0] smp_apic_timer_interrupt+0x3f/0x610
[ 240.475628][ C0] apic_timer_interrupt+0xf/0x20
[ 240.475630][ C0]
[ 240.475634][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 240.475643][ C0] Code: a8 f4 59 fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 04 06 53 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d f4 05 53 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 3e d4 0b fa e8 79
[ 240.475647][ C0] RSP: 0018:ffffffff88e07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 240.475654][ C0] RAX: 1ffffffff11e643f RBX: ffffffff88e7a1c0 RCX: 0000000000000000
[ 240.475659][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa5c
[ 240.475663][ C0] RBP: ffffffff88e07d18 R08: ffffffff88e7a1c0 R09: 0000000000000000
[ 240.475668][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 240.475672][ C0] R13: ffffffff89c828c0 R14: 0000000000000000 R15: 0000000000000000
[ 240.475675][ C0] ? default_idle+0x4e/0x360
[ 240.475678][ C0] arch_cpu_idle+0xa/0x10
[ 240.475682][ C0] default_idle_call+0x84/0xb0
[ 240.475684][ C0] do_idle+0x3b7/0x6e0
[ 240.475688][ C0] ? arch_cpu_idle_exit+0x80/0x80
[ 240.475691][ C0] ? trace_hardirqs_on+0x67/0x240
[ 240.475694][ C0] ? __kasan_check_read+0x11/0x20
[ 240.475698][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 240.475701][ C0] ? debug_smp_processor_id+0x33/0x18a
[ 240.475705][ C0] cpu_startup_entry+0x1b/0x20
[ 240.475707][ C0] rest_init+0x23b/0x371
[ 240.475711][ C0] arch_call_rest_init+0xe/0x1b
[ 240.475714][ C0] start_kernel+0x904/0x943
[ 240.475717][ C0] ? mem_encrypt_init+0xb/0xb
[ 240.475721][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 240.475724][ C0] ? x86_family+0x41/0x50
[ 240.475727][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 240.475731][ C0] x86_64_start_reservations+0x29/0x2b
[ 240.475734][ C0] x86_64_start_kernel+0x77/0x7b
[ 240.475737][ C0] secondary_startup_64+0xa4/0xb0
[ 240.477144][ T803] Kernel panic - not syncing: hung_task: blocked tasks
[ 240.845310][ T803] CPU: 1 PID: 803 Comm: khungtaskd Not tainted 5.4.0-rc4-next-20191025 #0
[ 240.853796][ T803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 240.863843][ T803] Call Trace:
[ 240.867130][ T803] dump_stack+0x172/0x1f0
[ 240.871455][ T803] panic+0x2e3/0x75c
[ 240.875333][ T803] ? add_taint.cold+0x16/0x16
[ 240.879986][ T803] ? lapic_can_unplug_cpu.cold+0x3a/0x3a
[ 240.885599][ T803] ? ___preempt_schedule+0x16/0x18
[ 240.890704][ T803] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b
[ 240.896842][ T803] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b
[ 240.902979][ T803] ? nmi_trigger_cpumask_backtrace+0x256/0x28b
[ 240.909176][ T803] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b
[ 240.915327][ T803] watchdog+0xca0/0x1350
[ 240.919570][ T803] kthread+0x361/0x430
[ 240.923631][ T803] ? reset_hung_task_detector+0x30/0x30
[ 240.929168][ T803] ? kthread_mod_delayed_work+0x1f0/0x1f0
[ 240.934893][ T803] ret_from_fork+0x24/0x30
[ 240.940943][ T803] Kernel Offset: disabled
[ 240.945275][ T803] Rebooting in 86400 seconds..