INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes [ 608.435936] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.73' (ECDSA) to the list of known hosts. [ 614.036755] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 614.132632] audit: type=1400 audit(1537944812.565:7): avc: denied { map } for pid=1886 comm="syz-executor339" path="/root/syz-executor339857099" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 858.080169] INFO: task jbd2/sda1-8:75 blocked for more than 140 seconds. [ 858.087162] Not tainted 4.14.71+ #8 [ 858.092209] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.100274] jbd2/sda1-8 D27584 75 2 0x80000000 [ 858.105923] Call Trace: [ 858.108512] ? __schedule+0x729/0x1ed0 [ 858.112515] ? __sched_text_start+0x8/0x8 [ 858.116665] ? lock_downgrade+0x560/0x560 [ 858.120930] ? jbd2_journal_commit_transaction+0x5c2/0x648c [ 858.126650] schedule+0x7f/0x1b0 [ 858.130122] jbd2_journal_commit_transaction+0x724/0x648c [ 858.135670] ? trace_hardirqs_on+0x10/0x10 [ 858.139921] ? journal_submit_commit_record+0xa00/0xa00 [ 858.145432] ? trace_hardirqs_on+0x10/0x10 [ 858.149671] ? __lock_acquire+0x619/0x4320 [ 858.154041] ? __lock_acquire+0x619/0x4320 [ 858.158288] ? lock_downgrade+0x560/0x560 [ 858.162548] ? lock_acquire+0x10f/0x380 [ 858.166521] ? debug_object_assert_init+0xec/0x380 [ 858.171569] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 858.176690] ? wait_woken+0x270/0x270 [ 858.180632] ? try_to_del_timer_sync+0xbf/0x110 [ 858.185306] ? lock_downgrade+0x560/0x560 [ 858.189464] ? lock_timer_base+0x58/0x1a0 [ 858.193717] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 858.198835] ? try_to_del_timer_sync+0xbf/0x110 [ 858.203609] ? detach_if_pending+0x400/0x400 [ 858.208014] ? try_to_del_timer_sync+0x110/0x110 [ 858.212906] ? del_timer_sync+0x10c/0x130 [ 858.217091] kjournald2+0x244/0x820 [ 858.221492] ? commit_timeout+0x20/0x20 [ 858.225623] ? lock_downgrade+0x560/0x560 [ 858.229777] ? wait_woken+0x270/0x270 [ 858.233766] ? commit_timeout+0x20/0x20 [ 858.237754] kthread+0x348/0x420 [ 858.241214] ? kthread_create_on_node+0xe0/0xe0 [ 858.245890] ret_from_fork+0x3a/0x50 [ 858.249616] INFO: task kworker/u4:2:365 blocked for more than 140 seconds. [ 858.256744] Not tainted 4.14.71+ #8 [ 858.260978] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.268940] kworker/u4:2 D25600 365 2 0x80000000 [ 858.275152] Workqueue: writeback wb_workfn (flush-8:0) [ 858.280523] Call Trace: [ 858.283117] ? __schedule+0x729/0x1ed0 [ 858.287004] ? __sched_text_start+0x8/0x8 [ 858.291253] ? lock_downgrade+0x560/0x560 [ 858.295395] ? lock_acquire+0x10f/0x380 [ 858.299368] ? wait_transaction_locked+0x15a/0x220 [ 858.304399] schedule+0x7f/0x1b0 [ 858.307767] wait_transaction_locked+0x1a1/0x220 [ 858.312625] ? ext4_init_security+0x40/0x40 [ 858.316946] ? wait_woken+0x270/0x270 [ 858.320884] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 858.325378] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 858.329863] ? kmem_cache_alloc+0xe4/0x2b0 [ 858.334204] add_transaction_credits+0x403/0x970 [ 858.338961] ? wb_workfn+0x85d/0xe00 [ 858.342765] ? process_one_work+0x86e/0x15c0 [ 858.347195] ? worker_thread+0xdc/0x1000 [ 858.352077] ? ret_from_fork+0x3a/0x50 [ 858.355968] ? sub_reserved_credits+0x30/0x30 [ 858.360554] ? lock_acquire+0x10f/0x380 [ 858.364535] ? start_this_handle+0x24b/0xfc0 [ 858.368933] ? kthread+0x348/0x420 [ 858.372569] ? ret_from_fork+0x3a/0x50 [ 858.376470] start_this_handle+0x368/0xfc0 [ 858.381095] ? mpage_release_unused_pages+0x384/0x4e0 [ 858.386292] ? jbd2_journal_free_reserved+0xe0/0xe0 [ 858.391401] ? jbd2__journal_start+0x144/0x8b0 [ 858.395996] ? jbd2__journal_start+0x144/0x8b0 [ 858.400668] ? rcu_read_lock_sched_held+0x102/0x120 [ 858.405690] jbd2__journal_start+0x30a/0x8b0 [ 858.410198] ? ext4_writepages+0x105e/0x3040 [ 858.414601] __ext4_journal_start_sb+0x109/0x460 [ 858.419348] ? ext4_meta_trans_blocks+0x20e/0x2b0 [ 858.424288] ext4_writepages+0x105e/0x3040 [ 858.428556] ? __lock_acquire+0x619/0x4320 [ 858.432911] ? ext4_mark_inode_dirty+0x7e0/0x7e0 [ 858.437670] ? trace_hardirqs_on+0x10/0x10 [ 858.441997] ? __lock_acquire+0x619/0x4320 [ 858.446234] ? trace_hardirqs_on+0x10/0x10 [ 858.450570] ? trace_hardirqs_on+0x10/0x10 [ 858.454822] ? ext4_mark_inode_dirty+0x7e0/0x7e0 [ 858.459572] ? do_writepages+0xe0/0x270 [ 858.463637] ? ext4_mark_inode_dirty+0x7e0/0x7e0 [ 858.468390] do_writepages+0xe0/0x270 [ 858.472289] ? reacquire_held_locks+0xb5/0x3e0 [ 858.476874] ? page_writeback_cpu_online+0x10/0x10 [ 858.482550] __writeback_single_inode+0xd8/0x1020 [ 858.487405] ? trace_hardirqs_on+0x10/0x10 [ 858.491753] writeback_sb_inodes+0x468/0xcd0 [ 858.496175] ? __writeback_single_inode+0x1020/0x1020 [ 858.501489] ? down_read_trylock+0x52/0xb0 [ 858.505725] ? trylock_super+0x1a/0xe0 [ 858.509625] __writeback_inodes_wb+0xf8/0x1e0 [ 858.514252] wb_writeback+0x4ee/0xb90 [ 858.518056] ? timer_fixup_init+0x50/0x50 [ 858.522299] ? __writeback_inodes_wb+0x1e0/0x1e0 [ 858.527053] ? cpumask_next+0x1f/0x30 [ 858.530946] ? _find_next_bit+0xdc/0x110 [ 858.535016] ? get_nr_dirty_inodes+0xbc/0x120 [ 858.539507] wb_workfn+0x85d/0xe00 [ 858.543157] ? inode_wait_for_writeback+0x30/0x30 [ 858.548021] process_one_work+0x86e/0x15c0 [ 858.552360] ? pwq_dec_nr_in_flight+0x2b0/0x2b0 [ 858.557043] worker_thread+0xdc/0x1000 [ 858.561031] ? process_one_work+0x15c0/0x15c0 [ 858.565533] ? process_one_work+0x15c0/0x15c0 [ 858.570116] kthread+0x348/0x420 [ 858.573483] ? kthread_create_on_node+0xe0/0xe0 [ 858.578147] ret_from_fork+0x3a/0x50 [ 858.581985] [ 858.581985] Showing all locks held in the system: [ 858.588316] 1 lock held by khungtaskd/23: [ 858.592497] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f [ 858.601549] 4 locks held by kworker/u4:2/365: [ 858.606029] #0: ("writeback"){+.+.}, at: [] process_one_work+0x787/0x15c0 [ 858.614806] #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x7bf/0x15c0 [ 858.624378] #2: (&type->s_umount_key#34){++++}, at: [] trylock_super+0x1a/0xe0 [ 858.633510] #3: (&sbi->s_journal_flag_rwsem){.+.+}, at: [] do_writepages+0xe0/0x270 [ 858.643079] 3 locks held by rs:main Q:Reg/1627: [ 858.647746] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 [ 858.656030] #1: (sb_writers#4){.+.+}, at: [] vfs_write+0x3d7/0x4d0 [ 858.664123] #2: (&sb->s_type->i_mutex_key#10){+.+.}, at: [] ext4_file_write_iter+0x1b9/0xe20 [ 858.674494] 2 locks held by getty/1757: [ 858.678456] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 858.687415] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 858.696724] 2 locks held by init/1890: [ 858.700623] #0: (sb_writers#4){.+.+}, at: [] vfs_write+0x3d7/0x4d0 [ 858.708689] #1: (&sb->s_type->i_mutex_key#10){+.+.}, at: [] ext4_file_write_iter+0x1b9/0xe20 [ 858.719048] [ 858.720689] ============================================= [ 858.720689] [ 858.728565] NMI backtrace for cpu 1 [ 858.732221] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.71+ #8 [ 858.738633] Call Trace: [ 858.741209] dump_stack+0xb9/0x11b [ 858.744747] ? irq_force_complete_move.cold.3+0x64/0x64 [ 858.750102] nmi_cpu_backtrace.cold.0+0x47/0x85 [ 858.754763] ? irq_force_complete_move.cold.3+0x64/0x64 [ 858.760113] nmi_trigger_cpumask_backtrace+0x121/0x146 [ 858.765386] watchdog+0x574/0xa70 [ 858.768843] ? reset_hung_task_detector+0x10/0x10 [ 858.773673] kthread+0x348/0x420 [ 858.777028] ? kthread_create_on_node+0xe0/0xe0 [ 858.781698] ret_from_fork+0x3a/0x50 [ 858.785485] Sending NMI from CPU 1 to CPUs 0: [ 858.790466] NMI backtrace for cpu 0 [ 858.790470] CPU: 0 PID: 1886 Comm: syz-executor339 Not tainted 4.14.71+ #8 [ 858.790473] task: ffff8801c8532f00 task.stack: ffff8801c69f0000 [ 858.790476] RIP: 0010:mext_check_coverage.constprop.2+0x1b0/0x3c0 [ 858.790479] RSP: 0018:ffff8801c69f76e8 EFLAGS: 00000246 [ 858.790484] RAX: ffff8801ca4bb780 RBX: ffff8801ca4bb780 RCX: 1ffff100394976f2 [ 858.790488] RDX: dffffc0000000000 RSI: 00000000bbdd3916 RDI: ffff8801ca4bb790 [ 858.790491] RBP: 00000000bbdd3916 R08: 00000000e36c30ef R09: 0000000000000000 [ 858.790494] R10: ffff8801c8533820 R11: 0000000000000001 R12: ffff8801c69f78f8 [ 858.790498] R13: ffff8801bf416b28 R14: ffff8801bf416938 R15: 0000000000008002 [ 858.790501] FS: 00000000011cf880(0000) GS:ffff8801d7600000(0000) knlGS:0000000000000000 [ 858.790504] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 858.790507] CR2: 00007fd37ff39330 CR3: 00000001c7112004 CR4: 00000000001606b0 [ 858.790509] Call Trace: [ 858.790512] ? ext4_multi_mount_protect+0x8c0/0x8c0 [ 858.790514] ? down_write_nested+0x36/0x90 [ 858.790517] ? ext4_double_down_write_data_sem+0x3e/0x70 [ 858.790520] ext4_move_extents+0x17dc/0x2a10 [ 858.790522] ? trace_hardirqs_on+0x10/0x10 [ 858.790524] ? kasan_slab_free+0x119/0x190 [ 858.790527] ? ext4_double_up_write_data_sem+0x30/0x30 [ 858.790530] ? jbd2_journal_stop+0x712/0x1280 [ 858.790533] ? ext4_alloc_file_blocks.isra.10+0x5e0/0x7d0 [ 858.790535] ? trace_hardirqs_on+0x10/0x10 [ 858.790538] ? debug_check_no_obj_freed+0x2b2/0x77c [ 858.790540] ? preempt_count_add+0x7d/0x130 [ 858.790543] ? mnt_clone_write+0xd9/0x130 [ 858.790545] ? __mnt_want_write_file+0x8d/0xa0 [ 858.790547] ext4_ioctl+0x275c/0x35e0 [ 858.790550] ? check_preemption_disabled+0x34/0x160 [ 858.790553] ? ext4_ioctl_setflags+0x540/0x540 [ 858.790555] ? avc_has_extended_perms+0x54c/0xd50 [ 858.790558] ? jbd2_journal_stop+0x717/0x1280 [ 858.790560] ? avc_ss_reset+0x100/0x100 [ 858.790563] ? ext4_expand_extra_isize+0x4f0/0x4f0 [ 858.790565] ? ext4_alloc_file_blocks.isra.10+0x4aa/0x7d0 [ 858.790568] ? lock_downgrade+0x560/0x560 [ 858.790570] ? dput.part.6+0x3b3/0x710 [ 858.790573] ? ext4_ioctl_setflags+0x540/0x540 [ 858.790575] do_vfs_ioctl+0x1a0/0x1030 [ 858.790578] ? ioctl_preallocate+0x1d0/0x1d0 [ 858.790580] ? __fsnotify_inode_delete+0x20/0x20 [ 858.790583] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 858.790585] ? vfs_fallocate+0x55e/0x700 [ 858.790588] ? check_preemption_disabled+0x34/0x160 [ 858.790590] ? security_file_ioctl+0x7c/0xb0 [ 858.790593] SyS_ioctl+0x7e/0xb0 [ 858.790595] ? do_vfs_ioctl+0x1030/0x1030 [ 858.790597] do_syscall_64+0x19b/0x4b0 [ 858.790600] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 858.790602] RIP: 0033:0x440169 [ 858.790605] RSP: 002b:00007ffd9739b378 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 858.790611] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 858.790614] RDX: 0000000020000040 RSI: 00000000c028660f RDI: 0000000000000003 [ 858.790617] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 858.790621] R10: 00000000004002c8 R11: 0000000000000217 R12: 00000000004019f0 [ 858.790624] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 858.790626] Code: 0f b7 85 16 fe ff ff 48 ba 00 00 00 00 00 fc ff df 48 8d 04 40 48 c1 e0 04 48 01 d8 48 8d 78 10 48 89 f9 48 c1 e9 03 80 3c 11 00 <0f> 85 a9 01 00 00 4c 8b 78 10 48 b8 00 00 00 00 00 fc ff df 49 [ 858.791509] Kernel panic - not syncing: hung_task: blocked tasks [ 858.791517] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.71+ #8 [ 858.791519] Call Trace: [ 858.791528] dump_stack+0xb9/0x11b [ 858.791539] panic+0x1bf/0x3a4 [ 858.791547] ? add_taint.cold.4+0x16/0x16 [ 858.791570] watchdog+0x585/0xa70 [ 858.791586] ? reset_hung_task_detector+0x10/0x10 [ 858.791593] kthread+0x348/0x420 [ 858.791600] ? kthread_create_on_node+0xe0/0xe0 [ 858.791610] ret_from_fork+0x3a/0x50 [ 859.154488] Kernel Offset: 0x22c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 859.165414] Rebooting in 86400 seconds..