[ 37.019678] audit: type=1800 audit(1538742179.713:22): pid=5689 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.046768] audit: type=1800 audit(1538742179.713:23): pid=5689 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.072825] audit: type=1800 audit(1538742179.723:24): pid=5689 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.10.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 496.332743] IPVS: ftp: loaded support on port[0] = 21 [ 649.643052] INFO: task jbd2/sda1-8:3079 blocked for more than 140 seconds. [ 649.650125] Not tainted 4.19.0-rc6+ #245 [ 649.654976] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 649.663045] jbd2/sda1-8 D19552 3079 2 0x80000000 [ 649.668686] Call Trace: [ 649.671286] __schedule+0x86c/0x1ed0 [ 649.675115] ? trace_hardirqs_off+0xb8/0x310 [ 649.679539] ? kasan_check_read+0x11/0x20 [ 649.683788] ? __sched_text_start+0x8/0x8 [ 649.687956] ? prepare_to_wait+0x1b3/0x3f0 [ 649.692192] ? lock_downgrade+0x900/0x900 [ 649.696869] ? trace_hardirqs_on+0xbd/0x310 [ 649.701196] ? kasan_check_read+0x11/0x20 [ 649.705438] ? prepare_to_wait+0x1b3/0x3f0 [ 649.709680] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 649.715248] ? kasan_check_write+0x14/0x20 [ 649.719493] ? do_raw_spin_lock+0xc1/0x200 [ 649.723904] schedule+0xfe/0x460 [ 649.727278] ? lock_downgrade+0x900/0x900 [ 649.731432] ? __schedule+0x1ed0/0x1ed0 [ 649.735520] ? kasan_check_read+0x11/0x20 [ 649.739689] ? do_raw_spin_unlock+0xa7/0x2f0 [ 649.744193] ? do_raw_write_trylock+0x1c0/0x1c0 [ 649.748871] ? kasan_check_write+0x14/0x20 [ 649.753209] ? do_raw_spin_lock+0xc1/0x200 [ 649.757460] jbd2_journal_commit_transaction+0xd42/0x89f8 [ 649.763092] ? update_group_capacity+0x1060/0x1060 [ 649.768054] ? mark_held_locks+0x130/0x130 [ 649.772359] ? journal_submit_commit_record+0xb60/0xb60 [ 649.777896] ? mark_held_locks+0x130/0x130 [ 649.782142] ? __update_load_avg_blocked_se+0x730/0x730 [ 649.787637] ? __update_load_avg_se+0xb90/0xb90 [ 649.792333] ? find_busiest_group+0x100/0x1d20 [ 649.797052] ? update_sd_lb_stats+0x2a40/0x2a40 [ 649.801739] ? finish_wait+0x430/0x430 [ 649.805725] ? do_raw_spin_unlock+0xa7/0x2f0 [ 649.810145] ? trace_hardirqs_on+0x310/0x310 [ 649.814681] ? lock_repin_lock+0x430/0x430 [ 649.818947] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 649.824462] ? find_next_and_bit+0x183/0x1e0 [ 649.828903] ? mark_held_locks+0x130/0x130 [ 649.833239] ? load_balance+0x6dd/0x3430 [ 649.837355] ? rq_online_fair+0x4d0/0x4d0 [ 649.841507] ? find_busiest_group+0x1d20/0x1d20 [ 649.846286] ? cpuacct_charge+0x282/0x440 [ 649.850444] ? cpuacct_css_alloc+0x160/0x160 [ 649.854967] ? do_raw_spin_unlock+0xa7/0x2f0 [ 649.859393] ? trace_hardirqs_on+0x310/0x310 [ 649.863936] ? mark_held_locks+0x130/0x130 [ 649.868186] ? mark_held_locks+0x130/0x130 [ 649.872438] ? reweight_entity+0x10f0/0x10f0 [ 649.876963] ? lock_acquire+0x1ed/0x520 [ 649.880948] ? pick_next_task_fair+0x1122/0x17c0 [ 649.885791] ? lock_release+0x970/0x970 [ 649.889779] ? lock_release+0x970/0x970 [ 649.893893] ? lock_is_held_type+0x210/0x210 [ 649.898315] ? kasan_check_write+0x14/0x20 [ 649.902559] ? do_raw_spin_lock+0xc1/0x200 [ 649.906903] ? pick_next_task_fair+0x659/0x17c0 [ 649.911586] ? __update_idle_core+0x2f7/0x600 [ 649.916193] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 649.922008] ? finish_task_switch+0x1f5/0x900 [ 649.926608] ? mark_held_locks+0x130/0x130 [ 649.930861] ? trace_hardirqs_on+0xbd/0x310 [ 649.935285] ? kasan_check_read+0x11/0x20 [ 649.939447] ? finish_task_switch+0x1f5/0x900 [ 649.944036] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 649.949498] ? compat_start_thread+0x80/0x80 [ 649.954444] ? cpu_load_update_active+0x2c0/0x2c0 [ 649.959304] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 649.964940] ? mark_held_locks+0x130/0x130 [ 649.969181] ? mark_held_locks+0x130/0x130 [ 649.973511] ? kasan_check_write+0x14/0x20 [ 649.977767] ? finish_task_switch+0x2f5/0x900 [ 649.982283] ? __switch_to_asm+0x40/0x70 [ 649.986459] ? preempt_notifier_register+0x200/0x200 [ 649.991595] ? __switch_to_asm+0x34/0x70 [ 649.995832] ? __switch_to_asm+0x34/0x70 [ 649.999920] ? __switch_to_asm+0x40/0x70 [ 650.004094] ? __switch_to_asm+0x34/0x70 [ 650.008161] ? __switch_to_asm+0x40/0x70 [ 650.012221] ? __switch_to_asm+0x34/0x70 [ 650.016379] ? __switch_to_asm+0x40/0x70 [ 650.020448] ? __switch_to_asm+0x34/0x70 [ 650.024610] ? __switch_to_asm+0x34/0x70 [ 650.028675] ? __switch_to_asm+0x40/0x70 [ 650.032737] ? __switch_to_asm+0x34/0x70 [ 650.036914] ? __switch_to_asm+0x40/0x70 [ 650.040983] ? __switch_to_asm+0x34/0x70 [ 650.045139] ? __switch_to_asm+0x40/0x70 [ 650.049213] ? __schedule+0x874/0x1ed0 [ 650.053194] ? lock_acquire+0x1ed/0x520 [ 650.057179] ? lock_timer_base+0xbb/0x2b0 [ 650.061344] ? lock_release+0x970/0x970 [ 650.065457] ? trace_hardirqs_off+0xb8/0x310 [ 650.069890] ? debug_object_assert_init+0x368/0x4b0 [ 650.075012] ? lock_timer_base+0xbb/0x2b0 [ 650.079173] ? trace_hardirqs_on+0x310/0x310 [ 650.084094] ? try_to_del_timer_sync+0xec/0x140 [ 650.088773] ? lock_downgrade+0x900/0x900 [ 650.093018] ? init_timer_key+0x480/0x480 [ 650.097174] ? _raw_spin_lock_irqsave+0xa1/0xd0 [ 650.101843] ? trace_hardirqs_on+0xbd/0x310 [ 650.106261] ? kasan_check_read+0x11/0x20 [ 650.110430] ? try_to_del_timer_sync+0xec/0x140 [ 650.115189] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 650.120647] ? stub_timer+0x10/0x10 [ 650.124379] ? lock_downgrade+0x900/0x900 [ 650.128547] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 650.133756] ? try_to_del_timer_sync+0xec/0x140 [ 650.138445] ? del_timer+0x150/0x150 [ 650.142181] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.147844] kjournald2+0x26d/0xb30 [ 650.151486] ? __bpf_trace_jbd2_end_commit+0x30/0x30 [ 650.156699] ? __kthread_parkme+0xce/0x1a0 [ 650.160943] ? lock_downgrade+0x900/0x900 [ 650.165183] ? trace_hardirqs_on+0xbd/0x310 [ 650.169519] ? finish_wait+0x430/0x430 [ 650.173524] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 650.178996] ? kasan_check_write+0x14/0x20 [ 650.183322] ? do_raw_spin_lock+0xc1/0x200 [ 650.187570] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 650.192674] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 650.198309] ? __kthread_parkme+0xfb/0x1a0 [ 650.202563] kthread+0x35a/0x420 [ 650.206042] ? __bpf_trace_jbd2_end_commit+0x30/0x30 [ 650.211154] ? kthread_bind+0x40/0x40 [ 650.215461] ret_from_fork+0x3a/0x50 [ 650.219196] INFO: lockdep is turned off. [ 650.223338] NMI backtrace for cpu 0 [ 650.226975] CPU: 0 PID: 984 Comm: khungtaskd Not tainted 4.19.0-rc6+ #245 [ 650.233901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 650.243249] Call Trace: [ 650.245843] dump_stack+0x1c4/0x2b4 [ 650.249475] ? dump_stack_print_info.cold.2+0x52/0x52 [ 650.254673] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.260218] nmi_cpu_backtrace.cold.3+0x63/0xa2 [ 650.264927] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 650.270119] nmi_trigger_cpumask_backtrace+0x1b3/0x1ed [ 650.275400] arch_trigger_cpumask_backtrace+0x14/0x20 [ 650.280587] watchdog+0xb3e/0x1050 [ 650.284181] ? reset_hung_task_detector+0xd0/0xd0 [ 650.289026] ? __kthread_parkme+0xce/0x1a0 [ 650.293264] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 650.298394] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 650.303501] ? lockdep_hardirqs_on+0x421/0x5c0 [ 650.308142] ? trace_hardirqs_on+0xbd/0x310 [ 650.312511] ? kasan_check_read+0x11/0x20 [ 650.316701] ? __kthread_parkme+0xce/0x1a0 [ 650.320938] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 650.326402] ? kasan_check_write+0x14/0x20 [ 650.330641] ? do_raw_spin_lock+0xc1/0x200 [ 650.334882] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 650.339990] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 650.345542] ? __kthread_parkme+0xfb/0x1a0 [ 650.349781] kthread+0x35a/0x420 [ 650.353156] ? reset_hung_task_detector+0xd0/0xd0 [ 650.358002] ? kthread_bind+0x40/0x40 [ 650.361811] ret_from_fork+0x3a/0x50 [ 650.365645] Sending NMI from CPU 0 to CPUs 1: [ 650.371264] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.096 msecs [ 650.372148] NMI backtrace for cpu 1 [ 650.372155] CPU: 1 PID: 5842 Comm: syz-executor675 Not tainted 4.19.0-rc6+ #245 [ 650.372163] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 650.372168] RIP: 0010:__sanitizer_cov_trace_cmp4+0x5/0x20 [ 650.372182] Code: 80 00 00 00 00 55 0f b7 d6 0f b7 f7 bf 02 00 00 00 48 89 e5 48 8b 4d 08 e8 08 ff ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe 04 00 00 00 48 89 e5 48 8b 4d 08 e8 ea fe ff ff 5d c3 0f 1f 84 [ 650.372186] RSP: 0018:ffff8801c354f1b0 EFLAGS: 00000293 [ 650.372196] RAX: ffff8801d59e4380 RBX: 00000000fffffff1 RCX: ffffffff8210f5b3 [ 650.372203] RDX: 00000000f931145b RSI: 00000000fffffff1 RDI: 00000000fffffff1 [ 650.372209] RBP: ffff8801c354f270 R08: ffff8801d59e4380 R09: ffffed0037269bb0 [ 650.372215] R10: ffffed0037269bb0 R11: ffff8801b934dd83 R12: 000000000000edca [ 650.372221] R13: 00000000f931145b R14: ffff8801b934b230 R15: ffff8801c354f3e0 [ 650.372228] FS: 0000000000ba0880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 650.372246] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 650.372252] CR2: 00000000004b4470 CR3: 00000001c3e1b000 CR4: 00000000001406e0 [ 650.372255] Call Trace: [ 650.372260] ? mext_check_coverage.constprop.13+0x28b/0x510 [ 650.372264] ? mext_page_mkuptodate+0x12b0/0x12b0 [ 650.372268] ext4_move_extents+0x2784/0x3c20 [ 650.372273] ? ext4_double_up_write_data_sem+0x30/0x30 [ 650.372277] ? jbd2_journal_stop+0x430/0x15d0 [ 650.372281] ? kmem_cache_free+0x21a/0x290 [ 650.372286] ? jbd2_journal_stop+0x234/0x15d0 [ 650.372290] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.372294] ? ext4_reserve_inode_write+0x148/0x260 [ 650.372299] ? ext4_mark_inode_dirty+0x26f/0xb30 [ 650.372315] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 650.372319] ? ext4_alloc_file_blocks+0x50b/0xaf0 [ 650.372335] ? ext4_expand_extra_isize+0x5b0/0x5b0 [ 650.372340] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 650.372344] ? ktime_get_coarse_real_ts64+0x243/0x3b0 [ 650.372361] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.372366] ? inode_init_owner+0x340/0x340 [ 650.372370] ? current_time+0x131/0x1b0 [ 650.372374] ? lock_acquire+0x1ed/0x520 [ 650.372378] ? mnt_want_write_file+0x68/0x110 [ 650.372382] ? lock_release+0x970/0x970 [ 650.372386] ? arch_local_save_flags+0x40/0x40 [ 650.372390] ? fget_raw+0x20/0x20 [ 650.372394] ? lock_release+0x970/0x970 [ 650.372398] ? arch_local_save_flags+0x40/0x40 [ 650.372403] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.372408] ? check_preemption_disabled+0x48/0x200 [ 650.372412] ? preempt_count_add+0x7d/0x160 [ 650.372417] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.372421] ? __mnt_want_write_file+0xa2/0xc0 [ 650.372425] ext4_ioctl+0x3154/0x4210 [ 650.372429] ? aa_path_link+0x5e0/0x5e0 [ 650.372434] ? ext4_ioctl_group_add+0x560/0x560 [ 650.372438] ? generic_write_checks+0x382/0x5d0 [ 650.372442] ? ext4_insert_range+0x1410/0x1410 [ 650.372447] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 650.372452] ? __generic_file_write_iter+0x1bd/0x630 [ 650.372456] ? vfs_fallocate+0x7ab/0x940 [ 650.372460] ? lock_downgrade+0x900/0x900 [ 650.372465] ? arch_local_save_flags+0x40/0x40 [ 650.372469] ? fsnotify_first_mark+0x350/0x350 [ 650.372473] ? arch_local_save_flags+0x40/0x40 [ 650.372477] ? fsnotify+0x12f0/0x12f0 [ 650.372482] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.372487] ? check_preemption_disabled+0x48/0x200 [ 650.372491] ? __sb_end_write+0xd9/0x110 [ 650.372495] ? vfs_fallocate+0x548/0x940 [ 650.372500] ? ioctl_preallocate+0x145/0x300 [ 650.372504] ? ioctl_file_clone+0x2c0/0x2c0 [ 650.372508] ? vfs_write+0x2f3/0x560 [ 650.372513] ? ext4_ioctl_group_add+0x560/0x560 [ 650.372516] do_vfs_ioctl+0x1de/0x1720 [ 650.372521] ? fsnotify_first_mark+0x350/0x350 [ 650.372525] ? __fsnotify_parent+0xcc/0x420 [ 650.372538] ? ioctl_preallocate+0x300/0x300 [ 650.372544] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 650.372548] ? __fget_light+0x2e9/0x430 [ 650.372551] ? fget_raw+0x20/0x20 [ 650.372555] ? __sb_end_write+0xd9/0x110 [ 650.372559] ? ksys_write+0x1ae/0x260 [ 650.372563] ? security_file_ioctl+0x94/0xc0 [ 650.372567] ksys_ioctl+0xa9/0xd0 [ 650.372570] __x64_sys_ioctl+0x73/0xb0 [ 650.372575] do_syscall_64+0x1b9/0x820 [ 650.372579] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 650.372584] ? syscall_return_slowpath+0x5e0/0x5e0 [ 650.372589] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 650.372593] ? trace_hardirqs_on_caller+0x310/0x310 [ 650.372598] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 650.372603] ? prepare_exit_to_usermode+0x291/0x3b0 [ 650.372607] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 650.372612] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 650.372615] RIP: 0033:0x440859 [ 650.372628] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 650.372633] RSP: 002b:00007ffea3899838 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 650.372643] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440859 [ 650.372649] RDX: 0000000020000300 RSI: 00000000c028660f RDI: 0000000000000003 [ 650.372655] RBP: 00000000006cb018 R08: 0000000000000100 R09: 0000000000000100 [ 650.372661] R10: 0000000000000100 R11: 0000000000000217 R12: 0000000000401d40 [ 650.372667] R13: 0000000000401dd0 R14: 0000000000000000 R15: 0000000000000000 [ 650.373330] Kernel panic - not syncing: hung_task: blocked tasks [ 650.891570] CPU: 0 PID: 984 Comm: khungtaskd Not tainted 4.19.0-rc6+ #245 [ 650.898493] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 650.907838] Call Trace: [ 650.910459] dump_stack+0x1c4/0x2b4 [ 650.914090] ? dump_stack_print_info.cold.2+0x52/0x52 [ 650.919296] panic+0x238/0x4e7 [ 650.922492] ? add_taint.cold.5+0x16/0x16 [ 650.926647] ? nmi_trigger_cpumask_backtrace+0x16a/0x1ed [ 650.932103] ? nmi_trigger_cpumask_backtrace+0x1c4/0x1ed [ 650.937557] ? nmi_trigger_cpumask_backtrace+0x173/0x1ed [ 650.943011] ? nmi_trigger_cpumask_backtrace+0x16a/0x1ed [ 650.948468] watchdog+0xb4f/0x1050 [ 650.952029] ? reset_hung_task_detector+0xd0/0xd0 [ 650.956914] ? __kthread_parkme+0xce/0x1a0 [ 650.961152] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 650.966284] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 650.971388] ? lockdep_hardirqs_on+0x421/0x5c0 [ 650.975971] ? trace_hardirqs_on+0xbd/0x310 [ 650.980288] ? kasan_check_read+0x11/0x20 [ 650.984438] ? __kthread_parkme+0xce/0x1a0 [ 650.988677] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 650.994126] ? kasan_check_write+0x14/0x20 [ 650.998362] ? do_raw_spin_lock+0xc1/0x200 [ 651.002610] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 651.007719] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 651.013256] ? __kthread_parkme+0xfb/0x1a0 [ 651.017495] kthread+0x35a/0x420 [ 651.020865] ? reset_hung_task_detector+0xd0/0xd0 [ 651.025709] ? kthread_bind+0x40/0x40 [ 651.029516] ret_from_fork+0x3a/0x50 [ 651.034201] Kernel Offset: disabled [ 651.037829] Rebooting in 86400 seconds..