[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.277586] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 17.168443] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.525998] random: sshd: uninitialized urandom read (32 bytes read) [ 18.253716] random: sshd: uninitialized urandom read (32 bytes read) [ 143.801830] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. [ 149.298516] random: sshd: uninitialized urandom read (32 bytes read) [ 149.383376] IPVS: ftp: loaded support on port[0] = 21 [ 164.322398] ================================================================== [ 164.329964] BUG: KASAN: stack-out-of-bounds in move_expired_inodes+0xcb5/0xd80 [ 164.337337] Read of size 8 at addr ffff8801a802c750 by task kworker/u4:4/849 [ 164.344550] [ 164.346295] CPU: 0 PID: 849 Comm: kworker/u4:4 Not tainted 4.18.0-rc3+ #45 [ 164.353444] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 164.362964] Workqueue: writeback wb_workfn (flush-8:0) [ 164.368259] Call Trace: [ 164.370891] dump_stack+0x1c9/0x2b4 [ 164.374543] ? dump_stack_print_info.cold.2+0x52/0x52 [ 164.379789] ? printk+0xa7/0xcf [ 164.383113] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 164.387911] ? move_expired_inodes+0xcb5/0xd80 [ 164.392536] print_address_description+0x6c/0x20b [ 164.397396] ? move_expired_inodes+0xcb5/0xd80 [ 164.402000] kasan_report.cold.7+0x242/0x2fe [ 164.406446] __asan_report_load8_noabort+0x14/0x20 [ 164.411420] move_expired_inodes+0xcb5/0xd80 [ 164.415853] ? redirty_tail+0x240/0x240 [ 164.419847] ? trace_hardirqs_on+0x10/0x10 [ 164.424096] ? rb_erase+0x3550/0x3550 [ 164.427918] ? trace_hardirqs_on+0x10/0x10 [ 164.432170] ? do_raw_spin_lock+0xc1/0x200 [ 164.436425] ? trace_hardirqs_on+0xd/0x10 [ 164.440613] ? debug_object_active_state+0x2f5/0x4d0 [ 164.445737] ? kasan_check_read+0x11/0x20 [ 164.449940] ? task_fork_fair+0x680/0x680 [ 164.454116] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 164.458983] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 164.463850] ? perf_trace_lock+0x920/0x920 [ 164.468110] ? note_gp_changes+0x550/0x550 [ 164.472367] ? select_idle_sibling+0x9df/0xd90 [ 164.476963] ? release_task.part.17+0xf5d/0x1bb0 [ 164.481744] ? lock_downgrade+0x8f0/0x8f0 [ 164.485929] queue_io+0x309/0x860 [ 164.489438] ? move_expired_inodes+0xd80/0xd80 [ 164.494070] ? lock_acquire+0x1e4/0x540 [ 164.498058] ? wb_writeback+0x1d9/0xf80 [ 164.502052] ? lock_release+0xa30/0xa30 [ 164.506045] ? trace_hardirqs_on+0x10/0x10 [ 164.510300] ? kasan_check_write+0x14/0x20 [ 164.514552] ? do_raw_spin_lock+0xc1/0x200 [ 164.518807] wb_writeback+0xaf9/0xf80 [ 164.522627] ? writeback_inodes_wb.constprop.49+0x330/0x330 [ 164.528388] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 164.533424] ? widen_string+0xe0/0x2e0 [ 164.537335] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 164.542567] ? string+0x225/0x2d0 [ 164.546049] ? widen_string+0x2e0/0x2e0 [ 164.550045] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 164.555085] ? find_next_bit+0x104/0x130 [ 164.559170] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 164.564206] ? find_next_bit+0x104/0x130 [ 164.568287] ? cpumask_next+0x24/0x30 [ 164.572103] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 164.577132] ? get_nr_dirty_inodes+0xd0/0x130 [ 164.581647] ? get_nr_dirty_pages+0x17c/0x1f0 [ 164.586159] ? inode_sleep_on_writeback+0x240/0x240 [ 164.591192] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 164.595801] ? wb_workfn+0x503/0x1760 [ 164.599640] ? trace_hardirqs_on+0xd/0x10 [ 164.603812] wb_workfn+0xfb7/0x1760 [ 164.607458] ? cpuacct_css_alloc+0x160/0x160 [ 164.611886] ? inode_wait_for_writeback+0x40/0x40 [ 164.616760] ? __account_cfs_rq_runtime+0x600/0x600 [ 164.621803] ? trace_hardirqs_on+0x10/0x10 [ 164.626056] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 164.630917] ? trace_hardirqs_on+0x10/0x10 [ 164.635195] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 164.640101] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 164.644964] ? lock_release+0xa30/0xa30 [ 164.648964] ? perf_trace_lock+0x920/0x920 [ 164.653226] ? perf_trace_lock+0x920/0x920 [ 164.657485] ? lock_acquire+0x1e4/0x540 [ 164.661476] ? debug_object_deactivate+0x2eb/0x450 [ 164.666424] ? lock_downgrade+0x8f0/0x8f0 [ 164.670594] ? kasan_check_read+0x11/0x20 [ 164.674779] ? lock_acquire+0x1e4/0x540 [ 164.678777] ? process_one_work+0xb9b/0x1ba0 [ 164.683208] ? kasan_check_read+0x11/0x20 [ 164.687377] ? lock_release+0xa30/0xa30 [ 164.691367] ? kasan_check_read+0x11/0x20 [ 164.695567] ? do_raw_spin_unlock+0xa7/0x2f0 [ 164.699995] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 164.704596] ? read_word_at_a_time+0x20/0x20 [ 164.709024] ? compat_start_thread+0x80/0x80 [ 164.713453] process_one_work+0xc73/0x1ba0 [ 164.717730] ? trace_hardirqs_on+0x10/0x10 [ 164.722003] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 164.726693] ? lock_repin_lock+0x430/0x430 [ 164.730980] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 164.735848] ? perf_trace_lock+0x920/0x920 [ 164.740101] ? lock_downgrade+0x8f0/0x8f0 [ 164.744263] ? graph_lock+0x170/0x170 [ 164.748094] ? graph_lock+0x170/0x170 [ 164.751914] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 164.756686] ? retint_kernel+0x10/0x10 [ 164.760592] ? do_raw_spin_unlock+0xa7/0x2f0 [ 164.765018] ? lock_acquire+0x1e4/0x540 [ 164.769030] ? worker_thread+0x3dc/0x13c0 [ 164.773199] ? lock_downgrade+0x8f0/0x8f0 [ 164.777370] ? lock_release+0xa30/0xa30 [ 164.781357] ? kasan_check_read+0x11/0x20 [ 164.785516] ? do_raw_spin_unlock+0xa7/0x2f0 [ 164.789942] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 164.794550] ? kasan_check_write+0x14/0x20 [ 164.798812] ? do_raw_spin_lock+0xc1/0x200 [ 164.803068] worker_thread+0x189/0x13c0 [ 164.807237] ? process_one_work+0x1ba0/0x1ba0 [ 164.811790] ? graph_lock+0x170/0x170 [ 164.815637] ? find_held_lock+0x36/0x1c0 [ 164.819728] ? find_held_lock+0x36/0x1c0 [ 164.823826] ? __schedule+0x1ed0/0x1ed0 [ 164.827817] ? do_raw_spin_unlock+0xa7/0x2f0 [ 164.832244] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 164.836849] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 164.842423] ? __kthread_parkme+0x111/0x1d0 [ 164.846769] ? parse_args.cold.15+0x1b3/0x1b3 [ 164.851695] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 164.856747] ? trace_hardirqs_on+0xd/0x10 [ 164.860915] kthread+0x345/0x410 [ 164.864301] ? process_one_work+0x1ba0/0x1ba0 [ 164.868933] ? kthread_bind+0x40/0x40 [ 164.872760] ret_from_fork+0x3a/0x50 [ 164.876478] [ 164.878110] Allocated by task 2170490192: [ 164.882267] BUG: unable to handle kernel paging request at ffffffff8c430958 [ 164.889367] PGD 8e6d067 P4D 8e6d067 PUD 8e6e063 PMD 0 [ 164.894675] Oops: 0000 [#1] SMP KASAN [ 164.898486] CPU: 0 PID: 849 Comm: kworker/u4:4 Not tainted 4.18.0-rc3+ #45 [ 164.905499] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 164.914873] Workqueue: writeback wb_workfn (flush-8:0) [ 164.920179] RIP: 0010:depot_fetch_stack+0x10/0x30 [ 164.925021] Code: e8 65 30 47 fe e9 b3 fd ff ff e8 5b 30 47 fe e9 55 fd ff ff 90 90 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 60 09 43 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 [ 164.944322] RSP: 0018:ffff8801d7dae930 EFLAGS: 00010006 [ 164.949703] RAX: 00000000001fffff RBX: ffff8801a802cbb4 RCX: 0000000000000000 [ 164.957013] RDX: 0000000000000000 RSI: ffff8801d7dae938 RDI: 0000000000003ff0 [ 164.964323] RBP: ffff8801d7dae960 R08: ffff8801d7c4e380 R09: ffffed003b5c3ec2 [ 164.971605] R10: ffffed003b5c3ec2 R11: ffff8801dae1f617 R12: ffff8801a802c400 [ 164.978885] R13: ffff8801a802c750 R14: ffff8801d3f30e40 R15: ffff8801a802cbb0 [ 164.986167] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 164.994404] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 165.000299] CR2: ffffffff8c430958 CR3: 00000001bb012000 CR4: 00000000001406f0 [ 165.007589] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 165.014898] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 165.022477] Call Trace: [ 165.025082] ? print_track.isra.4+0x3b/0x6f [ 165.029422] print_address_description+0xfb/0x20b [ 165.034287] ? move_expired_inodes+0xcb5/0xd80 [ 165.038884] kasan_report.cold.7+0x242/0x2fe [ 165.043316] __asan_report_load8_noabort+0x14/0x20 [ 165.048264] move_expired_inodes+0xcb5/0xd80 [ 165.052693] ? redirty_tail+0x240/0x240 [ 165.056695] ? trace_hardirqs_on+0x10/0x10 [ 165.060974] ? rb_erase+0x3550/0x3550 [ 165.064786] ? trace_hardirqs_on+0x10/0x10 [ 165.069061] ? do_raw_spin_lock+0xc1/0x200 [ 165.073319] ? trace_hardirqs_on+0xd/0x10 [ 165.077487] ? debug_object_active_state+0x2f5/0x4d0 [ 165.082627] ? kasan_check_read+0x11/0x20 [ 165.086797] ? task_fork_fair+0x680/0x680 [ 165.090956] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 165.095899] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 165.100763] ? perf_trace_lock+0x920/0x920 [ 165.105012] ? note_gp_changes+0x550/0x550 [ 165.109262] ? select_idle_sibling+0x9df/0xd90 [ 165.113861] ? release_task.part.17+0xf5d/0x1bb0 [ 165.118635] ? lock_downgrade+0x8f0/0x8f0 [ 165.122802] queue_io+0x309/0x860 [ 165.126277] ? move_expired_inodes+0xd80/0xd80 [ 165.130880] ? lock_acquire+0x1e4/0x540 [ 165.135058] ? wb_writeback+0x1d9/0xf80 [ 165.139057] ? lock_release+0xa30/0xa30 [ 165.143068] ? trace_hardirqs_on+0x10/0x10 [ 165.147323] ? kasan_check_write+0x14/0x20 [ 165.151576] ? do_raw_spin_lock+0xc1/0x200 [ 165.155831] wb_writeback+0xaf9/0xf80 [ 165.159662] PANIC: double fault, error_code: 0x0 [ 165.159679] ? writeback_inodes_wb.constprop.49+0x330/0x330 [ 165.159696] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 165.164457] CPU: 1 PID: 8116 Comm: syz-executor725 Not tainted 4.18.0-rc3+ #45 [ 165.170149] ? widen_string+0xe0/0x2e0 [ 165.175189] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 165.175215] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 165.182559] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 165.186414] Code: 41 [ 165.195787] ? string+0x225/0x2d0 [ 165.200565] 57 [ 165.205754] ? widen_string+0x2e0/0x2e0 [ 165.208128] 41 89 [ 165.211578] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 165.211588] ? find_next_bit+0x104/0x130 [ 165.211599] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 165.211607] ? find_next_bit+0x104/0x130 [ 165.211620] ? cpumask_next+0x24/0x30 [ 165.211629] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 165.211641] ? get_nr_dirty_inodes+0xd0/0x130 [ 165.211654] ? get_nr_dirty_pages+0x17c/0x1f0 [ 165.211664] ? inode_sleep_on_writeback+0x240/0x240 [ 165.211675] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 165.211686] ? wb_workfn+0x503/0x1760 [ 165.211705] ? trace_hardirqs_on+0xd/0x10 [ 165.211716] wb_workfn+0xfb7/0x1760 [ 165.211727] ? cpuacct_css_alloc+0x160/0x160 [ 165.211741] ? inode_wait_for_writeback+0x40/0x40 [ 165.211752] ? __account_cfs_rq_runtime+0x600/0x600 [ 165.211762] ? trace_hardirqs_on+0x10/0x10 [ 165.211772] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 165.211781] ? trace_hardirqs_on+0x10/0x10 [ 165.211798] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 165.211808] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 165.211817] ? lock_release+0xa30/0xa30 [ 165.211827] ? perf_trace_lock+0x920/0x920 [ 165.211837] ? perf_trace_lock+0x920/0x920 [ 165.211850] ? lock_acquire+0x1e4/0x540 [ 165.211859] ? debug_object_deactivate+0x2eb/0x450 [ 165.211869] ? lock_downgrade+0x8f0/0x8f0 [ 165.211882] ? kasan_check_read+0x11/0x20 [ 165.211895] ? lock_acquire+0x1e4/0x540 [ 165.211905] ? process_one_work+0xb9b/0x1ba0 [ 165.211915] ? kasan_check_read+0x11/0x20 [ 165.211925] ? lock_release+0xa30/0xa30 [ 165.211935] ? kasan_check_read+0x11/0x20 [ 165.211944] ? do_raw_spin_unlock+0xa7/0x2f0 [ 165.211952] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 165.211964] ? read_word_at_a_time+0x20/0x20 [ 165.211976] ? compat_start_thread+0x80/0x80 [ 165.211988] process_one_work+0xc73/0x1ba0 [ 165.211997] ? trace_hardirqs_on+0x10/0x10 [ 165.212011] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 165.212020] ? lock_repin_lock+0x430/0x430 [ 165.212033] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 165.212046] ? perf_trace_lock+0x920/0x920 [ 165.212056] ? lock_downgrade+0x8f0/0x8f0 [ 165.212067] ? graph_lock+0x170/0x170 [ 165.212077] ? graph_lock+0x170/0x170 [ 165.212094] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 165.213968] cf [ 165.217934] ? retint_kernel+0x10/0x10 [ 165.220045] 41 56 [ 165.225055] ? do_raw_spin_unlock+0xa7/0x2f0 [ 165.229077] 41 55 [ 165.234087] ? lock_acquire+0x1e4/0x540 [ 165.238122] 49 89 [ 165.241919] ? worker_thread+0x3dc/0x13c0 [ 165.246897] fd 41 [ 165.251389] ? lock_downgrade+0x8f0/0x8f0 [ 165.255860] 54 45 [ 165.260870] ? lock_release+0xa30/0xa30 [ 165.265417] 89 cc [ 165.269215] ? kasan_check_read+0x11/0x20 [ 165.273329] 53 65 [ 165.276948] ? do_raw_spin_unlock+0xa7/0x2f0 [ 165.281318] 4c 8b [ 165.286157] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 165.291137] 34 25 [ 165.295372] ? kasan_check_write+0x14/0x20 [ 165.300176] 40 ee [ 165.304604] ? do_raw_spin_lock+0xc1/0x200 [ 165.309412] 01 00 [ 165.314269] worker_thread+0x189/0x13c0 [ 165.318204] 48 83 [ 165.322436] ? process_one_work+0x1ba0/0x1ba0 [ 165.326631] e4 f0 [ 165.330604] ? graph_lock+0x170/0x170 [ 165.335492] 48 81 [ 165.339646] ? find_held_lock+0x36/0x1c0 [ 165.343753] ec 60 [ 165.347725] ? find_held_lock+0x36/0x1c0 [ 165.352093] 03 00 [ 165.356242] ? __schedule+0x1ed0/0x1ed0 [ 165.360174] 00 48 [ 165.364329] ? do_raw_spin_unlock+0xa7/0x2f0 [ 165.368707] 8b [ 165.373273] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 165.377645] 45 10 [ 165.382855] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 165.387059] <89> [ 165.391276] ? __kthread_parkme+0x111/0x1d0 [ 165.395909] 94 24 [ 165.400144] ? parse_args.cold.15+0x1b3/0x1b3 [ 165.404950] 80 00 [ 165.409191] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 165.409207] ? trace_hardirqs_on+0xd/0x10 [ 165.413320] 00 00 [ 165.417112] kthread+0x345/0x410 [ 165.420874] 48 ba [ 165.425622] ? process_one_work+0x1ba0/0x1ba0 [ 165.427473] 00 00 [ 165.431351] ? kthread_bind+0x40/0x40 [ 165.433468] 00 [ 165.437860] ret_from_fork+0x3a/0x50 [ 165.439977] 00 00 [ 165.443939] Modules linked in: [ 165.446055] fc ff [ 165.452304] df 48 [ 165.456433] Dumping ftrace buffer: [ 165.458547] 89 84 [ 165.462503] (ftrace buffer empty) [ 165.464626] 24 98 [ 165.468757] CR2: ffffffff8c430958 [ 165.470892] RSP: 0018:ffff8800fffffed0 EFLAGS: 00010082 [ 165.475285] ---[ end trace 565e600e75d0194b ]--- [ 165.482447] RIP: 0010:depot_fetch_stack+0x10/0x30 [ 165.484558] RAX: 0000000000000000 RBX: 1ffff10020000056 RCX: 0000000000000002 [ 165.484569] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 165.488775] Code: [ 165.490985] RBP: ffff880100000258 R08: 0000000000000000 R09: 0000000000000000 [ 165.490995] R10: 0000000000000000 R11: dffffc0000000000 R12: 0000000000000000 [ 165.495218] e8 [ 165.497343] R13: ffffffff88f92620 R14: ffff8801cf4343c0 R15: 0000000000000002 [ 165.497357] FS: 00007f2e19c1b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 165.501299] 65 [ 165.503426] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 165.503437] CR2: ffff8800fffffec8 CR3: 0000000008e6a000 CR4: 00000000001406e0 [ 165.507925] 30 [ 165.510054] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 165.513837] 47 [ 165.515960] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 165.515968] Call Trace: [ 165.520015] fe [ 165.522143] Kernel panic - not syncing: Machine halted. [ 165.526180] e9 b3 fd ff ff e8 5b 30 47 fe e9 55 fd ff ff 90 90 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 60 09 43 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 [ 165.748718] RSP: 0018:ffff8801d7dae930 EFLAGS: 00010006 [ 165.754068] RAX: 00000000001fffff RBX: ffff8801a802cbb4 RCX: 0000000000000000 [ 165.761333] RDX: 0000000000000000 RSI: ffff8801d7dae938 RDI: 0000000000003ff0 [ 165.768585] RBP: ffff8801d7dae960 R08: ffff8801d7c4e380 R09: ffffed003b5c3ec2 [ 165.775852] R10: ffffed003b5c3ec2 R11: ffff8801dae1f617 R12: ffff8801a802c400 [ 165.783107] R13: ffff8801a802c750 R14: ffff8801d3f30e40 R15: ffff8801a802cbb0 [ 165.790364] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 165.798576] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 165.804442] CR2: ffffffff8c430958 CR3: 00000001bb012000 CR4: 00000000001406f0 [ 165.811701] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 165.818954] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 166.601784] Shutting down cpus with NMI [ 166.606328] Dumping ftrace buffer: [ 166.609847] (ftrace buffer empty) [ 166.613532] Kernel Offset: disabled [ 166.617136] Rebooting in 86400 seconds..