[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.824238][ T26] audit: type=1800 audit(1572167709.456:25): pid=8672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.844471][ T26] audit: type=1800 audit(1572167709.456:26): pid=8672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.888987][ T26] audit: type=1800 audit(1572167709.466:27): pid=8672 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[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.140' (ECDSA) to the list of known hosts. syzkaller login: [ 236.940650][ T951] INFO: task kworker/u4:2:77 blocked for more than 143 seconds. [ 236.949173][ T951] Not tainted 5.4.0-rc4-next-20191025 #0 [ 236.956123][ T951] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 236.964974][ T951] kworker/u4:2 D24344 77 2 0x80004000 [ 236.971386][ T951] Workqueue: writeback wb_workfn (flush-8:0) [ 236.977363][ T951] Call Trace: [ 236.980758][ T951] __schedule+0x94a/0x1e70 [ 236.985251][ T951] ? __sched_text_start+0x8/0x8 [ 236.990124][ T951] ? blk_insert_cloned_request+0x530/0x530 [ 236.995987][ T951] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 237.002273][ T951] ? kthread_data+0x58/0xc0 [ 237.006782][ T951] schedule+0xdc/0x2b0 [ 237.010984][ T951] io_schedule+0x1c/0x70 [ 237.015248][ T951] __lock_page+0x422/0xab0 [ 237.019674][ T951] ? wait_on_page_bit+0xa60/0xa60 [ 237.024755][ T951] ? page_cache_next_miss+0x340/0x340 [ 237.030140][ T951] ? ___might_sleep+0x163/0x2c0 [ 237.035058][ T951] ? __might_sleep+0x95/0x190 [ 237.039752][ T951] mpage_prepare_extent_to_map+0xb3f/0xf90 [ 237.045616][ T951] ? mpage_process_page_bufs+0x780/0x780 [ 237.051288][ T951] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 237.056832][ T951] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 237.062859][ T951] ? kmem_cache_alloc_node_trace+0x4ef/0x750 [ 237.068866][ T951] ext4_writepages+0x954/0x2e70 [ 237.073820][ T951] ? ___might_sleep+0x163/0x2c0 [ 237.078693][ T951] ? __might_sleep+0x80/0x190 [ 237.084137][ T951] ? print_usage_bug+0xb1/0xd0 [ 237.089028][ T951] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 237.094547][ T951] ? __kasan_check_read+0x11/0x20 [ 237.099586][ T951] ? __lock_acquire+0x16f2/0x4a00 [ 237.104664][ T951] ? __kasan_check_read+0x11/0x20 [ 237.109692][ T951] ? mark_lock+0xc2/0x1220 [ 237.114292][ T951] ? mark_held_locks+0xf0/0xf0 [ 237.119063][ T951] ? __kasan_check_read+0x11/0x20 [ 237.124138][ T951] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 237.129602][ T951] do_writepages+0xfa/0x2a0 [ 237.134261][ T951] ? do_writepages+0xfa/0x2a0 [ 237.138949][ T951] ? page_writeback_cpu_online+0x20/0x20 [ 237.144627][ T951] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 237.150856][ T951] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 237.156424][ T951] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 237.162464][ T951] __writeback_single_inode+0x136/0x1400 [ 237.168174][ T951] ? _raw_spin_unlock+0x28/0x40 [ 237.173250][ T951] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 237.179522][ T951] ? wbc_attach_and_unlock_inode+0x5bf/0x920 [ 237.185658][ T951] writeback_sb_inodes+0x596/0xf20 [ 237.190869][ T951] ? __writeback_single_inode+0x1400/0x1400 [ 237.196788][ T951] ? trylock_super+0x22/0x110 [ 237.201539][ T951] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 237.207808][ T951] __writeback_inodes_wb+0xc3/0x260 [ 237.213902][ T951] wb_writeback+0x910/0xd90 [ 237.218466][ T951] ? mark_lock+0xc2/0x1220 [ 237.222949][ T951] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 237.229304][ T951] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 237.235099][ T951] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 237.240926][ T951] ? get_nr_dirty_inodes+0xe2/0x140 [ 237.246129][ T951] wb_workfn+0xba5/0x1220 [ 237.250462][ T951] ? inode_wait_for_writeback+0x40/0x40 [ 237.256070][ T951] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 237.262303][ T951] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 237.268396][ T951] ? trace_hardirqs_on+0x67/0x240 [ 237.273476][ T951] process_one_work+0x9af/0x1740 [ 237.278457][ T951] ? pwq_dec_nr_in_flight+0x320/0x320 [ 237.283887][ T951] ? lock_acquire+0x190/0x410 [ 237.288590][ T951] worker_thread+0x98/0xe40 [ 237.293161][ T951] ? trace_hardirqs_on+0x67/0x240 [ 237.298196][ T951] kthread+0x361/0x430 [ 237.302312][ T951] ? process_one_work+0x1740/0x1740 [ 237.307513][ T951] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 237.313304][ T951] ret_from_fork+0x24/0x30 [ 237.317731][ T951] INFO: task khugepaged:1083 blocked for more than 143 seconds. [ 237.325470][ T951] Not tainted 5.4.0-rc4-next-20191025 #0 [ 237.331682][ T951] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 237.340363][ T951] khugepaged D27840 1083 2 0x80004000 [ 237.347476][ T951] Call Trace: [ 237.351015][ T951] __schedule+0x94a/0x1e70 [ 237.355451][ T951] ? __sched_text_start+0x8/0x8 [ 237.360365][ T951] ? blk_insert_cloned_request+0x530/0x530 [ 237.367002][ T951] ? _raw_spin_unlock_irq+0x23/0x80 [ 237.372251][ T951] ? __lock_page+0x3d9/0xab0 [ 237.377014][ T951] ? _raw_spin_unlock_irq+0x23/0x80 [ 237.382243][ T951] schedule+0xdc/0x2b0 [ 237.386474][ T951] io_schedule+0x1c/0x70 [ 237.390796][ T951] __lock_page+0x422/0xab0 [ 237.395632][ T951] ? wait_on_page_bit+0xa60/0xa60 [ 237.400841][ T951] ? page_cache_next_miss+0x340/0x340 [ 237.406335][ T951] ? ___might_sleep+0x163/0x2c0 [ 237.411253][ T951] ? __might_sleep+0x95/0x190 [ 237.416097][ T951] mpage_prepare_extent_to_map+0xb3f/0xf90 [ 237.422334][ T951] ? mpage_process_page_bufs+0x780/0x780 [ 237.427994][ T951] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 237.434068][ T951] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 237.440433][ T951] ext4_writepages+0xb6a/0x2e70 [ 237.445366][ T951] ? scheduler_ipi+0x10c/0x610 [ 237.450275][ T951] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 237.455884][ T951] ? 0xffffffff81000000 [ 237.460063][ T951] ? mark_lock+0xc2/0x1220 [ 237.464614][ T951] ? prep_new_page+0x19f/0x200 [ 237.469511][ T951] ? wbc_attach_and_unlock_inode+0x515/0x920 [ 237.476278][ T951] ? find_held_lock+0x35/0x130 [ 237.481207][ T951] ? wbc_attach_and_unlock_inode+0x515/0x920 [ 237.487296][ T951] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 237.492811][ T951] do_writepages+0xfa/0x2a0 [ 237.497324][ T951] ? do_writepages+0xfa/0x2a0 [ 237.502070][ T951] ? lock_downgrade+0x920/0x920 [ 237.507069][ T951] ? page_writeback_cpu_online+0x20/0x20 [ 237.512776][ T951] ? __kasan_check_read+0x11/0x20 [ 237.517825][ T951] ? do_raw_spin_unlock+0x57/0x270 [ 237.523097][ T951] ? _raw_spin_unlock+0x28/0x40 [ 237.527967][ T951] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 237.534761][ T951] ? wbc_attach_and_unlock_inode+0x5bf/0x920 [ 237.540988][ T951] __filemap_fdatawrite_range+0x2bc/0x3b0 [ 237.546703][ T951] ? delete_from_page_cache_batch+0xfe0/0xfe0 [ 237.552954][ T951] ? lockdep_hardirqs_on+0x421/0x5e0 [ 237.558259][ T951] filemap_flush+0x24/0x30 [ 237.562737][ T951] collapse_file+0x36b1/0x41a0 [ 237.567511][ T951] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 237.574044][ T951] ? khugepaged+0x21d0/0x4360 [ 237.578739][ T951] ? trace_event_raw_event_mm_collapse_huge_page_isolate+0x370/0x370 [ 237.587046][ T951] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 237.592836][ T951] ? khugepaged_find_target_node+0x142/0x180 [ 237.598817][ T951] khugepaged+0x2da9/0x4360 [ 237.604107][ T951] ? __kasan_check_read+0x11/0x20 [ 237.609141][ T951] ? __lock_acquire+0x16f2/0x4a00 [ 237.614798][ T951] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 237.620452][ T951] ? lock_downgrade+0x920/0x920 [ 237.625367][ T951] ? finish_wait+0x260/0x260 [ 237.629963][ T951] ? lockdep_hardirqs_on+0x421/0x5e0 [ 237.635323][ T951] ? trace_hardirqs_on+0x67/0x240 [ 237.640455][ T951] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 237.646773][ T951] ? __kthread_parkme+0x108/0x1c0 [ 237.651867][ T951] ? __kasan_check_read+0x11/0x20 [ 237.656900][ T951] kthread+0x361/0x430 [ 237.661024][ T951] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 237.666692][ T951] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 237.672460][ T951] ret_from_fork+0x24/0x30 [ 237.676955][ T951] [ 237.676955][ T951] Showing all locks held in the system: [ 237.684776][ T951] 4 locks held by kworker/u4:2/77: [ 237.689905][ T951] #0: ffff8880a8326128 ((wq_completion)writeback){+.+.}, at: process_one_work+0x88b/0x1740 [ 237.700050][ T951] #1: ffff8880a94afdc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x8c1/0x1740 [ 237.711419][ T951] #2: ffff88809b60a0d8 (&type->s_umount_key#32){++++}, at: trylock_super+0x22/0x110 [ 237.720936][ T951] #3: ffff88809b60c990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 [ 237.731614][ T951] 1 lock held by khungtaskd/951: [ 237.736658][ T951] #0: ffffffff88faba80 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 237.746014][ T951] 1 lock held by khugepaged/1083: [ 237.751096][ T951] #0: ffff88809b60c990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 [ 237.761002][ T951] 1 lock held by rsyslogd/8711: [ 237.765845][ T951] #0: ffff8880a0611660 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 237.774530][ T951] 2 locks held by getty/8800: [ 237.779285][ T951] #0: ffff8880a75a8090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 237.788289][ T951] #1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 237.798006][ T951] 2 locks held by getty/8801: [ 237.802717][ T951] #0: ffff8880a39b5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 237.811731][ T951] #1: ffffc90005f292e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 237.821339][ T951] 2 locks held by getty/8802: [ 237.826006][ T951] #0: ffff88809a4e0090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 237.835027][ T951] #1: ffffc90005f0d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 237.844685][ T951] 2 locks held by getty/8803: [ 237.849360][ T951] #0: ffff8880951db090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 237.858522][ T951] #1: ffffc90005f092e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 237.868794][ T951] 2 locks held by getty/8804: [ 237.873516][ T951] #0: ffff888097a1f090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 237.882529][ T951] #1: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 237.892149][ T951] 2 locks held by getty/8805: [ 237.896814][ T951] #0: ffff888092898090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 237.905811][ T951] #1: ffffc90005f152e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 237.915432][ T951] 2 locks held by getty/8806: [ 237.920096][ T951] #0: ffff8880a17a3090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 237.929084][ T951] #1: ffffc90005ef12e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 237.938824][ T951] 1 lock held by syz-execprog/8823: [ 237.944164][ T951] #0: ffff8880976703e8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 [ 237.954127][ T951] [ 237.956446][ T951] ============================================= [ 237.956446][ T951] [ 237.964897][ T951] NMI backtrace for cpu 1 [ 237.969246][ T951] CPU: 1 PID: 951 Comm: khungtaskd Not tainted 5.4.0-rc4-next-20191025 #0 [ 237.977747][ T951] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 237.987824][ T951] Call Trace: [ 237.991108][ T951] dump_stack+0x172/0x1f0 [ 237.995451][ T951] nmi_cpu_backtrace.cold+0x70/0xb2 [ 238.000637][ T951] ? vprintk_func+0x86/0x189 [ 238.005319][ T951] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 238.010943][ T951] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 238.023964][ T951] arch_trigger_cpumask_backtrace+0x14/0x20 [ 238.029846][ T951] watchdog+0xc8f/0x1350 [ 238.034107][ T951] kthread+0x361/0x430 [ 238.038191][ T951] ? reset_hung_task_detector+0x30/0x30 [ 238.043732][ T951] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 238.049454][ T951] ret_from_fork+0x24/0x30 [ 238.054010][ T951] Sending NMI from CPU 1 to CPUs 0: [ 238.059785][ C0] NMI backtrace for cpu 0 [ 238.059790][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc4-next-20191025 #0 [ 238.059796][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 238.059799][ C0] RIP: 0010:__kasan_check_read+0xc/0x20 [ 238.059809][ C0] Code: 48 8b 73 58 89 c2 48 c7 c7 78 d7 aa 88 f7 da e8 ee cf ad ff e9 0e ef ff ff 90 90 90 90 90 55 89 f6 31 d2 48 89 e5 48 8b 4d 08 cf 26 00 00 5d c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 55 89 [ 238.059812][ C0] RSP: 0018:ffff8880ae809e18 EFLAGS: 00000046 [ 238.059820][ C0] RAX: 0000000000000000 RBX: 1ffff11015d013ca RCX: ffffffff81598e11 [ 238.059824][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff89c828c0 [ 238.059828][ C0] RBP: ffff8880ae809e18 R08: 0000000000005565 R09: fffffbfff14f3935 [ 238.059833][ C0] R10: ffffffff88e7aa60 R11: ffffffff88e7a1c0 R12: ffffffff88fbaa08 [ 238.059837][ C0] R13: ffffffff81675fd5 R14: ffff8880ae809ed0 R15: 0000000000000000 [ 238.059842][ C0] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 238.059846][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 238.059851][ C0] CR2: 0000000001e32000 CR3: 00000000a1a5c000 CR4: 00000000001406f0 [ 238.059855][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 238.059860][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 238.059862][ C0] Call Trace: [ 238.059864][ C0] [ 238.059868][ C0] lock_release+0x1a1/0x960 [ 238.059871][ C0] ? lock_downgrade+0x920/0x920 [ 238.059874][ C0] ? lock_acquire+0x190/0x410 [ 238.059877][ C0] ? tick_irq_enter+0xb5/0x3f0 [ 238.059880][ C0] ktime_get+0xe2/0x2f0 [ 238.059883][ C0] ? tick_irq_enter+0xb5/0x3f0 [ 238.059887][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 238.059890][ C0] tick_irq_enter+0xb5/0x3f0 [ 238.059893][ C0] irq_enter+0xbd/0xe0 [ 238.059897][ C0] smp_apic_timer_interrupt+0x3f/0x610 [ 238.059900][ C0] apic_timer_interrupt+0xf/0x20 [ 238.059902][ C0] [ 238.059905][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 238.059915][ 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 [ 238.059918][ C0] RSP: 0018:ffffffff88e07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 238.059926][ C0] RAX: 1ffffffff11e643f RBX: ffffffff88e7a1c0 RCX: 0000000000000000 [ 238.059931][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa5c [ 238.059935][ C0] RBP: ffffffff88e07d18 R08: ffffffff88e7a1c0 R09: 0000000000000000 [ 238.059940][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 238.059944][ C0] R13: ffffffff89c828c0 R14: 0000000000000000 R15: 0000000000000000 [ 238.059948][ C0] ? default_idle+0x4e/0x360 [ 238.059951][ C0] arch_cpu_idle+0xa/0x10 [ 238.059954][ C0] default_idle_call+0x84/0xb0 [ 238.059957][ C0] do_idle+0x3b7/0x6e0 [ 238.059960][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 238.059964][ C0] ? trace_hardirqs_on+0x67/0x240 [ 238.059967][ C0] ? __kasan_check_read+0x11/0x20 [ 238.059971][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 238.059974][ C0] ? debug_smp_processor_id+0x33/0x18a [ 238.059982][ C0] cpu_startup_entry+0x1b/0x20 [ 238.059985][ C0] rest_init+0x23b/0x371 [ 238.059988][ C0] arch_call_rest_init+0xe/0x1b [ 238.059991][ C0] start_kernel+0x904/0x943 [ 238.059994][ C0] ? mem_encrypt_init+0xb/0xb [ 238.059998][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 238.060001][ C0] ? x86_family+0x41/0x50 [ 238.060005][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 238.060008][ C0] x86_64_start_reservations+0x29/0x2b [ 238.060012][ C0] x86_64_start_kernel+0x77/0x7b [ 238.060015][ C0] secondary_startup_64+0xa4/0xb0 [ 238.061336][ T951] Kernel panic - not syncing: hung_task: blocked tasks [ 238.435911][ T951] CPU: 1 PID: 951 Comm: khungtaskd Not tainted 5.4.0-rc4-next-20191025 #0 [ 238.444398][ T951] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 238.454452][ T951] Call Trace: [ 238.457736][ T951] dump_stack+0x172/0x1f0 [ 238.462047][ T951] panic+0x2e3/0x75c [ 238.465927][ T951] ? add_taint.cold+0x16/0x16 [ 238.470593][ T951] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 238.476327][ T951] ? ___preempt_schedule+0x16/0x18 [ 238.481440][ T951] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 238.487571][ T951] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 238.493711][ T951] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 238.499859][ T951] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 238.505996][ T951] watchdog+0xca0/0x1350 [ 238.510233][ T951] kthread+0x361/0x430 [ 238.515844][ T951] ? reset_hung_task_detector+0x30/0x30 [ 238.521378][ T951] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 238.527277][ T951] ret_from_fork+0x24/0x30 [ 238.535485][ T951] Kernel Offset: disabled [ 238.539858][ T951] Rebooting in 86400 seconds..