INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes [ 972.291504] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. [ 977.819052] random: sshd: uninitialized urandom read (32 bytes read) [ 977.908052] audit: type=1400 audit(1555310141.840:8): avc: denied { map } for pid=2276 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2019/04/15 06:35:42 parsed 1 programs [ 978.800267] audit: type=1400 audit(1555310142.740:9): avc: denied { map } for pid=2276 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=5011 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 979.277559] random: cc1: uninitialized urandom read (8 bytes read) 2019/04/15 06:35:44 executed programs: 0 [ 980.594067] audit: type=1400 audit(1555310144.530:10): avc: denied { map } for pid=2276 comm="syz-execprog" path="/root/syzkaller-shm816282539" dev="sda1" ino=16512 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 2019/04/15 06:35:49 executed programs: 60 2019/04/15 06:35:54 executed programs: 178 2019/04/15 06:35:59 executed programs: 303 [ 1144.800196] INFO: task syz-executor.3:2294 blocked for more than 140 seconds. [ 1144.807552] Not tainted 4.14.111+ #54 [ 1144.812449] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.820436] syz-executor.3 D25144 2294 1 0x00000004 [ 1144.826055] Call Trace: [ 1144.828643] ? __schedule+0x91c/0x1f30 [ 1144.832775] ? __sched_text_start+0x8/0x8 [ 1144.837009] ? lock_downgrade+0x5d0/0x5d0 [ 1144.841289] ? lock_acquire+0x10f/0x380 [ 1144.845260] ? __mutex_lock+0x2c1/0x1430 [ 1144.849299] schedule+0x92/0x1c0 [ 1144.852747] schedule_preempt_disabled+0x13/0x20 [ 1144.857514] __mutex_lock+0x559/0x1430 [ 1144.861461] ? trace_hardirqs_on+0x10/0x10 [ 1144.865699] ? lo_release+0x78/0x190 [ 1144.869393] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1144.874959] ? lock_downgrade+0x5d0/0x5d0 [ 1144.879123] ? lock_acquire+0x10f/0x380 [ 1144.883158] ? __blkdev_put+0x1cb/0x6d0 [ 1144.887584] ? lo_compat_ioctl+0x130/0x130 [ 1144.892315] ? lo_release+0x78/0x190 [ 1144.896150] lo_release+0x78/0x190 [ 1144.899827] ? lo_compat_ioctl+0x130/0x130 [ 1144.904222] __blkdev_put+0x518/0x6d0 [ 1144.908129] ? bd_set_size+0xb0/0xb0 [ 1144.911884] ? blkdev_put+0x75/0x4c0 [ 1144.915591] ? blkdev_put+0x4c0/0x4c0 [ 1144.919432] blkdev_close+0x86/0xb0 [ 1144.923241] __fput+0x25e/0x700 [ 1144.926568] task_work_run+0x118/0x190 [ 1144.930494] exit_to_usermode_loop+0x13b/0x160 [ 1144.935192] do_syscall_64+0x372/0x4b0 [ 1144.939340] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1144.944831] INFO: task syz-executor.4:2296 blocked for more than 140 seconds. [ 1144.952281] Not tainted 4.14.111+ #54 [ 1144.956586] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.964573] syz-executor.4 D25592 2296 1 0x00000004 [ 1144.970211] Call Trace: [ 1144.973056] ? __schedule+0x91c/0x1f30 [ 1144.977029] ? __sched_text_start+0x8/0x8 [ 1144.981217] ? lock_downgrade+0x5d0/0x5d0 [ 1144.985927] ? lock_acquire+0x10f/0x380 [ 1144.989887] ? __mutex_lock+0x2c1/0x1430 [ 1144.993981] schedule+0x92/0x1c0 [ 1144.997342] schedule_preempt_disabled+0x13/0x20 [ 1145.002135] __mutex_lock+0x559/0x1430 [ 1145.006008] ? __mutex_lock+0x6aa/0x1430 [ 1145.010199] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1145.015169] ? lo_open+0x19/0xb0 [ 1145.018527] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1145.024017] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1145.029461] ? kobject_get_unless_zero+0x27/0x40 [ 1145.034265] ? lock_downgrade+0x5d0/0x5d0 [ 1145.038416] ? refcount_inc_not_zero+0x81/0xe0 [ 1145.044512] ? check_preemption_disabled+0x35/0x1f0 [ 1145.050641] ? loop_unregister_transfer+0x90/0x90 [ 1145.056837] ? lo_open+0x19/0xb0 [ 1145.060455] lo_open+0x19/0xb0 [ 1145.064655] __blkdev_get+0x267/0xf90 [ 1145.068606] ? __blkdev_put+0x6d0/0x6d0 [ 1145.072836] ? fsnotify+0x8b0/0x1150 [ 1145.076547] blkdev_get+0x97/0x8b0 [ 1145.080214] ? bd_acquire+0x171/0x2c0 [ 1145.085033] ? bd_may_claim+0xd0/0xd0 [ 1145.089217] ? lock_downgrade+0x5d0/0x5d0 [ 1145.093560] ? lock_acquire+0x10f/0x380 [ 1145.097530] ? bd_acquire+0x21/0x2c0 [ 1145.101294] blkdev_open+0x1cc/0x250 [ 1145.105372] ? security_file_open+0x88/0x190 [ 1145.110074] do_dentry_open+0x44e/0xdf0 [ 1145.114048] ? bd_acquire+0x2c0/0x2c0 [ 1145.118020] vfs_open+0x105/0x230 [ 1145.121611] path_openat+0xb6b/0x2b70 [ 1145.126725] ? path_mountpoint+0x9a0/0x9a0 [ 1145.131116] ? trace_hardirqs_on+0x10/0x10 [ 1145.135349] do_filp_open+0x1a1/0x280 [ 1145.139141] ? may_open_dev+0xe0/0xe0 [ 1145.143016] ? lock_downgrade+0x5d0/0x5d0 [ 1145.147427] ? lock_acquire+0x10f/0x380 [ 1145.151499] ? __alloc_fd+0x3f/0x490 [ 1145.155836] ? _raw_spin_unlock+0x29/0x40 [ 1145.160127] ? __alloc_fd+0x1bf/0x490 [ 1145.164072] do_sys_open+0x2ca/0x590 [ 1145.167781] ? filp_open+0x60/0x60 [ 1145.171369] ? SyS_mkdirat+0x146/0x220 [ 1145.175308] ? _raw_spin_unlock_irq+0x35/0x50 [ 1145.181622] ? do_syscall_64+0x43/0x4b0 [ 1145.186130] ? do_sys_open+0x590/0x590 [ 1145.190090] do_syscall_64+0x19b/0x4b0 [ 1145.194161] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.200103] INFO: task syz-executor.5:3853 blocked for more than 140 seconds. [ 1145.207369] Not tainted 4.14.111+ #54 [ 1145.211754] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.219707] syz-executor.5 D28048 3853 2300 0x00000004 [ 1145.225625] Call Trace: [ 1145.228258] ? __schedule+0x91c/0x1f30 [ 1145.232302] ? __sched_text_start+0x8/0x8 [ 1145.237195] ? lock_downgrade+0x5d0/0x5d0 [ 1145.241716] ? lock_acquire+0x10f/0x380 [ 1145.246087] ? __mutex_lock+0x2c1/0x1430 [ 1145.250200] schedule+0x92/0x1c0 [ 1145.253938] schedule_preempt_disabled+0x13/0x20 [ 1145.258679] __mutex_lock+0x559/0x1430 [ 1145.262738] ? blkdev_reread_part+0x1b/0x40 [ 1145.267056] ? mark_lock+0xf90/0xfa0 [ 1145.270815] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1145.277038] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 1145.282208] ? __wake_up_common_lock+0xe0/0x170 [ 1145.287817] ? blkdev_reread_part+0x1b/0x40 [ 1145.292218] blkdev_reread_part+0x1b/0x40 [ 1145.296365] loop_reread_partitions+0x72/0x80 [ 1145.300999] loop_set_status+0xbff/0x11f0 [ 1145.305147] ? loop_set_status64+0xa5/0x100 [ 1145.309459] ? loop_set_status_old+0x2f0/0x2f0 [ 1145.314139] ? security_capable+0x8e/0xc0 [ 1145.318289] ? lo_ioctl+0x50b/0x1970 [ 1145.322118] ? __lock_acquire+0x56a/0x3fa0 [ 1145.326464] ? loop_clr_fd+0xac0/0xac0 [ 1145.331345] ? blkdev_ioctl+0x4d9/0x1810 [ 1145.335538] ? blkpg_ioctl+0x910/0x910 [ 1145.339428] ? trace_hardirqs_on+0x10/0x10 [ 1145.343744] ? kasan_slab_free+0x11a/0x190 [ 1145.347976] ? kasan_slab_free+0xb0/0x190 [ 1145.352193] ? kfree+0xf5/0x310 [ 1145.355470] ? exit_robust_list+0x240/0x240 [ 1145.359792] ? block_ioctl+0xd9/0x120 [ 1145.363847] ? blkdev_fallocate+0x3b0/0x3b0 [ 1145.368165] ? do_vfs_ioctl+0xabe/0x1040 [ 1145.372272] ? selinux_file_ioctl+0x426/0x590 [ 1145.376827] ? selinux_file_ioctl+0x116/0x590 [ 1145.382038] ? ioctl_preallocate+0x1e0/0x1e0 [ 1145.386757] ? selinux_parse_skb.constprop.0+0x16b0/0x16b0 [ 1145.392972] ? __might_fault+0x177/0x1b0 [ 1145.397327] ? _copy_to_user+0x82/0xd0 [ 1145.401478] ? nsecs_to_jiffies+0x30/0x30 [ 1145.405889] ? security_file_ioctl+0x7c/0xb0 [ 1145.410856] ? SyS_ioctl+0x7f/0xb0 [ 1145.414782] ? do_vfs_ioctl+0x1040/0x1040 [ 1145.418925] ? do_syscall_64+0x19b/0x4b0 [ 1145.423130] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.428508] INFO: task syz-executor.2:3854 blocked for more than 140 seconds. [ 1145.436088] Not tainted 4.14.111+ #54 [ 1145.440571] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.449280] syz-executor.2 D28328 3854 2293 0x00000004 [ 1145.455006] Call Trace: [ 1145.457600] ? __schedule+0x91c/0x1f30 [ 1145.461578] ? __schedule+0x924/0x1f30 [ 1145.465593] ? __sched_text_start+0x8/0x8 [ 1145.469729] ? lock_downgrade+0x5d0/0x5d0 [ 1145.473944] ? lock_acquire+0x10f/0x380 [ 1145.478084] ? __mutex_lock+0x2c1/0x1430 [ 1145.482501] schedule+0x92/0x1c0 [ 1145.486316] schedule_preempt_disabled+0x13/0x20 [ 1145.491577] __mutex_lock+0x559/0x1430 [ 1145.495542] ? __mutex_lock+0x6aa/0x1430 [ 1145.499789] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1145.504929] ? lo_open+0x19/0xb0 [ 1145.508642] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1145.514206] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1145.520505] ? kobject_get_unless_zero+0x27/0x40 [ 1145.525647] ? get_disk+0xd0/0xd0 [ 1145.529157] ? exact_match+0x9/0x20 [ 1145.532902] ? blkdev_ioctl+0x1810/0x1810 [ 1145.537062] ? loop_unregister_transfer+0x90/0x90 [ 1145.542065] ? lo_open+0x19/0xb0 [ 1145.545434] lo_open+0x19/0xb0 [ 1145.548620] __blkdev_get+0x963/0xf90 [ 1145.552488] ? finish_task_switch+0x1e2/0x620 [ 1145.557078] ? __blkdev_put+0x6d0/0x6d0 [ 1145.561273] ? fsnotify+0x8b0/0x1150 [ 1145.564984] blkdev_get+0x97/0x8b0 [ 1145.568515] ? bd_acquire+0x171/0x2c0 [ 1145.572377] ? bd_may_claim+0xd0/0xd0 [ 1145.576178] ? lock_downgrade+0x5d0/0x5d0 [ 1145.580468] ? lock_acquire+0x10f/0x380 [ 1145.584502] ? bd_acquire+0x21/0x2c0 [ 1145.588233] ? preempt_schedule_common+0x4f/0xd0 [ 1145.593038] blkdev_open+0x1cc/0x250 [ 1145.596848] ? security_file_open+0x88/0x190 [ 1145.601348] do_dentry_open+0x44e/0xdf0 [ 1145.605315] ? bd_acquire+0x2c0/0x2c0 [ 1145.609108] vfs_open+0x105/0x230 [ 1145.612788] path_openat+0xb6b/0x2b70 [ 1145.616737] ? path_mountpoint+0x9a0/0x9a0 [ 1145.621020] ? trace_hardirqs_on+0x10/0x10 [ 1145.625252] do_filp_open+0x1a1/0x280 [ 1145.629043] ? may_open_dev+0xe0/0xe0 [ 1145.632888] ? lock_downgrade+0x5d0/0x5d0 [ 1145.637261] ? lock_acquire+0x10f/0x380 [ 1145.641276] ? __alloc_fd+0x3f/0x490 [ 1145.644989] ? _raw_spin_unlock+0x29/0x40 [ 1145.649120] ? __alloc_fd+0x1bf/0x490 [ 1145.652981] do_sys_open+0x2ca/0x590 [ 1145.656748] ? filp_open+0x60/0x60 [ 1145.660391] ? do_syscall_64+0x43/0x4b0 [ 1145.664418] ? do_sys_open+0x590/0x590 [ 1145.668376] do_syscall_64+0x19b/0x4b0 [ 1145.672430] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.678028] INFO: task syz-executor.1:3855 blocked for more than 140 seconds. [ 1145.685657] Not tainted 4.14.111+ #54 [ 1145.690905] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.699638] syz-executor.1 D28808 3855 2303 0x00000004 [ 1145.705520] Call Trace: [ 1145.708835] ? __schedule+0x91c/0x1f30 [ 1145.712810] ? __sched_text_start+0x8/0x8 [ 1145.717140] ? lock_downgrade+0x5d0/0x5d0 [ 1145.721361] ? lock_acquire+0x10f/0x380 [ 1145.725336] ? __mutex_lock+0x2c1/0x1430 [ 1145.729392] schedule+0x92/0x1c0 [ 1145.732845] schedule_preempt_disabled+0x13/0x20 [ 1145.737607] __mutex_lock+0x559/0x1430 [ 1145.741796] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1145.746659] ? trace_hardirqs_on+0x10/0x10 [ 1145.751055] ? __blkdev_get+0xf3/0xf90 [ 1145.754950] ? refcount_inc_not_zero+0x81/0xe0 [ 1145.760013] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1145.765586] ? kobject_get_unless_zero+0x27/0x40 [ 1145.770719] ? get_disk+0xd0/0xd0 [ 1145.774755] ? exact_match+0x9/0x20 [ 1145.778388] ? kobj_lookup+0x325/0x410 [ 1145.783438] ? blkdev_ioctl+0x1810/0x1810 [ 1145.788024] ? __blkdev_get+0xf3/0xf90 [ 1145.792003] __blkdev_get+0xf3/0xf90 [ 1145.795719] ? __blkdev_put+0x6d0/0x6d0 [ 1145.799687] ? fsnotify+0x8b0/0x1150 [ 1145.803516] blkdev_get+0x97/0x8b0 [ 1145.807340] ? bd_acquire+0x171/0x2c0 [ 1145.822110] ? bd_may_claim+0xd0/0xd0 [ 1145.825910] ? lock_downgrade+0x5d0/0x5d0 [ 1145.830181] ? lock_acquire+0x10f/0x380 [ 1145.834161] ? bd_acquire+0x21/0x2c0 [ 1145.837887] blkdev_open+0x1cc/0x250 [ 1145.841919] ? security_file_open+0x88/0x190 [ 1145.846500] do_dentry_open+0x44e/0xdf0 [ 1145.850545] ? bd_acquire+0x2c0/0x2c0 [ 1145.854340] vfs_open+0x105/0x230 [ 1145.857779] path_openat+0xb6b/0x2b70 [ 1145.861668] ? path_mountpoint+0x9a0/0x9a0 [ 1145.865901] ? trace_hardirqs_on+0x10/0x10 [ 1145.870300] do_filp_open+0x1a1/0x280 [ 1145.875260] ? may_open_dev+0xe0/0xe0 [ 1145.879057] ? lock_downgrade+0x5d0/0x5d0 [ 1145.883719] ? lock_acquire+0x10f/0x380 [ 1145.887885] ? __alloc_fd+0x3f/0x490 [ 1145.891883] ? _raw_spin_unlock+0x29/0x40 [ 1145.896025] ? __alloc_fd+0x1bf/0x490 [ 1145.899812] do_sys_open+0x2ca/0x590 [ 1145.903601] ? filp_open+0x60/0x60 [ 1145.907139] ? do_syscall_64+0x43/0x4b0 [ 1145.911173] ? do_sys_open+0x590/0x590 [ 1145.915048] do_syscall_64+0x19b/0x4b0 [ 1145.918935] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.924857] INFO: task syz-executor.0:3856 blocked for more than 140 seconds. [ 1145.932762] Not tainted 4.14.111+ #54 [ 1145.937084] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.945145] syz-executor.0 D27816 3856 2301 0x00000004 [ 1145.951496] Call Trace: [ 1145.954846] ? __schedule+0x91c/0x1f30 [ 1145.959017] ? __sched_text_start+0x8/0x8 [ 1145.963371] ? lock_downgrade+0x5d0/0x5d0 [ 1145.967534] ? lock_acquire+0x10f/0x380 [ 1145.971601] ? __mutex_lock+0x2c1/0x1430 [ 1145.975667] schedule+0x92/0x1c0 [ 1145.979028] schedule_preempt_disabled+0x13/0x20 [ 1145.983880] __mutex_lock+0x559/0x1430 [ 1145.987765] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1145.992803] ? trace_hardirqs_on+0x10/0x10 [ 1145.997203] ? __blkdev_get+0xf3/0xf90 [ 1146.001779] ? refcount_inc_not_zero+0x81/0xe0 [ 1146.007221] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1146.012905] ? kobject_get_unless_zero+0x27/0x40 [ 1146.018319] ? get_disk+0xd0/0xd0 [ 1146.021836] ? exact_match+0x9/0x20 [ 1146.025517] ? kobj_lookup+0x325/0x410 [ 1146.029449] ? blkdev_ioctl+0x1810/0x1810 [ 1146.033727] ? __blkdev_get+0xf3/0xf90 [ 1146.037785] __blkdev_get+0xf3/0xf90 [ 1146.041801] ? __blkdev_put+0x6d0/0x6d0 [ 1146.046066] ? fsnotify+0x8b0/0x1150 [ 1146.049774] blkdev_get+0x97/0x8b0 [ 1146.053664] ? bd_acquire+0x171/0x2c0 [ 1146.057467] ? bd_may_claim+0xd0/0xd0 [ 1146.061444] ? lock_downgrade+0x5d0/0x5d0 [ 1146.065587] ? lock_acquire+0x10f/0x380 [ 1146.069593] ? bd_acquire+0x21/0x2c0 [ 1146.073440] blkdev_open+0x1cc/0x250 [ 1146.077155] ? security_file_open+0x88/0x190 [ 1146.081684] do_dentry_open+0x44e/0xdf0 [ 1146.085707] ? bd_acquire+0x2c0/0x2c0 [ 1146.089503] vfs_open+0x105/0x230 [ 1146.093084] path_openat+0xb6b/0x2b70 [ 1146.096901] ? path_mountpoint+0x9a0/0x9a0 [ 1146.101183] ? trace_hardirqs_on+0x10/0x10 [ 1146.105416] do_filp_open+0x1a1/0x280 [ 1146.109196] ? may_open_dev+0xe0/0xe0 [ 1146.113022] ? lock_downgrade+0x5d0/0x5d0 [ 1146.117158] ? lock_acquire+0x10f/0x380 [ 1146.121215] ? __alloc_fd+0x3f/0x490 [ 1146.124985] ? _raw_spin_unlock+0x29/0x40 [ 1146.129120] ? __alloc_fd+0x1bf/0x490 [ 1146.132971] do_sys_open+0x2ca/0x590 [ 1146.136680] ? filp_open+0x60/0x60 [ 1146.140472] ? do_syscall_64+0x43/0x4b0 [ 1146.144434] ? do_sys_open+0x590/0x590 [ 1146.148362] do_syscall_64+0x19b/0x4b0 [ 1146.152314] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1146.157682] INFO: task blkid:3857 blocked for more than 140 seconds. [ 1146.164201] Not tainted 4.14.111+ #54 [ 1146.168507] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1146.176668] blkid D28448 3857 291 0x00000004 [ 1146.182311] Call Trace: [ 1146.184893] ? __schedule+0x91c/0x1f30 [ 1146.188772] ? __sched_text_start+0x8/0x8 [ 1146.192975] ? lock_downgrade+0x5d0/0x5d0 [ 1146.197124] ? lock_acquire+0x10f/0x380 [ 1146.201143] ? __mutex_lock+0x2c1/0x1430 [ 1146.205194] schedule+0x92/0x1c0 [ 1146.208540] schedule_preempt_disabled+0x13/0x20 [ 1146.213319] __mutex_lock+0x559/0x1430 [ 1146.217301] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1146.222207] ? trace_hardirqs_on+0x10/0x10 [ 1146.226429] ? __blkdev_get+0xf3/0xf90 [ 1146.230375] ? refcount_inc_not_zero+0x81/0xe0 [ 1146.235003] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1146.240502] ? kobject_get_unless_zero+0x27/0x40 [ 1146.245244] ? get_disk+0xd0/0xd0 [ 1146.248781] ? exact_match+0x9/0x20 [ 1146.252481] ? kobj_lookup+0x325/0x410 [ 1146.256471] ? blkdev_ioctl+0x1810/0x1810 [ 1146.260685] ? __blkdev_get+0xf3/0xf90 [ 1146.264559] __blkdev_get+0xf3/0xf90 [ 1146.268274] ? __blkdev_put+0x6d0/0x6d0 [ 1146.272325] ? fsnotify+0x8b0/0x1150 [ 1146.276037] blkdev_get+0x97/0x8b0 [ 1146.279570] ? bd_acquire+0x171/0x2c0 [ 1146.283444] ? bd_may_claim+0xd0/0xd0 [ 1146.287241] ? lock_downgrade+0x5d0/0x5d0 [ 1146.291440] ? lock_acquire+0x10f/0x380 [ 1146.295592] ? bd_acquire+0x21/0x2c0 [ 1146.299308] blkdev_open+0x1cc/0x250 [ 1146.303098] ? security_file_open+0x88/0x190 [ 1146.307506] do_dentry_open+0x44e/0xdf0 [ 1146.311566] ? bd_acquire+0x2c0/0x2c0 [ 1146.315361] vfs_open+0x105/0x230 [ 1146.318848] path_openat+0xb6b/0x2b70 [ 1146.322712] ? path_mountpoint+0x9a0/0x9a0 [ 1146.327102] ? trace_hardirqs_on+0x10/0x10 [ 1146.331377] do_filp_open+0x1a1/0x280 [ 1146.335179] ? may_open_dev+0xe0/0xe0 [ 1146.338969] ? lock_downgrade+0x5d0/0x5d0 [ 1146.343151] ? lock_acquire+0x10f/0x380 [ 1146.347116] ? __alloc_fd+0x3f/0x490 [ 1146.351064] ? _raw_spin_unlock+0x29/0x40 [ 1146.355205] ? __alloc_fd+0x1bf/0x490 [ 1146.358991] do_sys_open+0x2ca/0x590 [ 1146.362762] ? filp_open+0x60/0x60 [ 1146.366311] ? do_syscall_64+0x43/0x4b0 [ 1146.370333] ? do_sys_open+0x590/0x590 [ 1146.374302] do_syscall_64+0x19b/0x4b0 [ 1146.378218] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1146.383705] INFO: task blkid:3859 blocked for more than 140 seconds. [ 1146.390223] Not tainted 4.14.111+ #54 [ 1146.394525] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1146.402518] blkid D29152 3859 293 0x00000004 [ 1146.408137] Call Trace: [ 1146.410838] ? __schedule+0x91c/0x1f30 [ 1146.414749] ? __sched_text_start+0x8/0x8 [ 1146.418883] ? lock_downgrade+0x5d0/0x5d0 [ 1146.423063] ? lock_acquire+0x10f/0x380 [ 1146.427064] ? __mutex_lock+0x2c1/0x1430 [ 1146.431164] schedule+0x92/0x1c0 [ 1146.434518] schedule_preempt_disabled+0x13/0x20 [ 1146.439249] __mutex_lock+0x559/0x1430 [ 1146.443159] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1146.448027] ? trace_hardirqs_on+0x10/0x10 [ 1146.452341] ? __blkdev_get+0xf3/0xf90 [ 1146.456233] ? refcount_inc_not_zero+0x81/0xe0 [ 1146.460852] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1146.466298] ? kobject_get_unless_zero+0x27/0x40 [ 1146.471091] ? get_disk+0xd0/0xd0 [ 1146.474537] ? exact_match+0x9/0x20 [ 1146.478145] ? kobj_lookup+0x325/0x410 [ 1146.482078] ? blkdev_ioctl+0x1810/0x1810 [ 1146.486216] ? __blkdev_get+0xf3/0xf90 [ 1146.490122] __blkdev_get+0xf3/0xf90 [ 1146.493834] ? __blkdev_put+0x6d0/0x6d0 [ 1146.497786] ? fsnotify+0x8b0/0x1150 [ 1146.501534] blkdev_get+0x97/0x8b0 [ 1146.505061] ? bd_acquire+0x171/0x2c0 [ 1146.508840] ? bd_may_claim+0xd0/0xd0 [ 1146.512687] ? lock_downgrade+0x5d0/0x5d0 [ 1146.516823] ? lock_acquire+0x10f/0x380 [ 1146.520826] ? bd_acquire+0x21/0x2c0 [ 1146.524531] blkdev_open+0x1cc/0x250 [ 1146.528222] ? security_file_open+0x88/0x190 [ 1146.532669] do_dentry_open+0x44e/0xdf0 [ 1146.536630] ? bd_acquire+0x2c0/0x2c0 [ 1146.540464] vfs_open+0x105/0x230 [ 1146.543906] path_openat+0xb6b/0x2b70 [ 1146.547688] ? path_mountpoint+0x9a0/0x9a0 [ 1146.551979] ? trace_hardirqs_on+0x10/0x10 [ 1146.556205] do_filp_open+0x1a1/0x280 [ 1146.559998] ? may_open_dev+0xe0/0xe0 [ 1146.563851] ? lock_downgrade+0x5d0/0x5d0 [ 1146.567981] ? lock_acquire+0x10f/0x380 [ 1146.572116] ? __alloc_fd+0x3f/0x490 [ 1146.575832] ? _raw_spin_unlock+0x29/0x40 [ 1146.579967] ? __alloc_fd+0x1bf/0x490 [ 1146.583821] do_sys_open+0x2ca/0x590 [ 1146.587531] ? filp_open+0x60/0x60 [ 1146.591110] ? do_syscall_64+0x43/0x4b0 [ 1146.595074] ? do_sys_open+0x590/0x590 [ 1146.598956] do_syscall_64+0x19b/0x4b0 [ 1146.603053] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1146.608453] [ 1146.608453] Showing all locks held in the system: [ 1146.614849] 1 lock held by khungtaskd/23: [ 1146.619030] #0: (tasklist_lock){.+.+}, at: [< (ptrval)>] debug_show_all_locks+0x7c/0x21a [ 1146.628285] 2 locks held by getty/1756: [ 1146.632283] #0: (&tty->ldisc_sem){++++}, at: [< (ptrval)>] tty_ldisc_ref_wait+0x22/0x80 [ 1146.641332] #1: (&ldata->atomic_read_lock){+.+.}, at: [< (ptrval)>] n_tty_read+0x1f7/0x1700 [ 1146.650692] 3 locks held by syz-executor.3/2294: [ 1146.655436] #0: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] __blkdev_put+0xb1/0x6d0 [ 1146.664615] #1: (loop_index_mutex){+.+.}, at: [< (ptrval)>] lo_release+0x19/0x190 [ 1146.673091] #2: (loop_ctl_mutex#2){+.+.}, at: [< (ptrval)>] lo_release+0x78/0x190 [ 1146.681605] 2 locks held by syz-executor.4/2296: [ 1146.686352] #0: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] __blkdev_get+0xf3/0xf90 [ 1146.694966] #1: (loop_index_mutex){+.+.}, at: [< (ptrval)>] lo_open+0x19/0xb0 [ 1146.703091] 2 locks held by syz-executor.5/3853: [ 1146.707837] #0: (loop_ctl_mutex/1){+.+.}, at: [< (ptrval)>] lo_ioctl+0x83/0x1970 [ 1146.716258] #1: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] blkdev_reread_part+0x1b/0x40 [ 1146.725245] 2 locks held by syz-executor.2/3854: [ 1146.730104] #0: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] __blkdev_get+0xf3/0xf90 [ 1146.738643] #1: (loop_index_mutex){+.+.}, at: [< (ptrval)>] lo_open+0x19/0xb0 [ 1146.747040] 1 lock held by syz-executor.1/3855: [ 1146.751802] #0: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] __blkdev_get+0xf3/0xf90 [ 1146.760381] 1 lock held by syz-executor.0/3856: [ 1146.765082] #0: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] __blkdev_get+0xf3/0xf90 [ 1146.773747] 1 lock held by blkid/3857: [ 1146.777626] #0: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] __blkdev_get+0xf3/0xf90 [ 1146.786211] 1 lock held by blkid/3859: [ 1146.790118] #0: (&bdev->bd_mutex){+.+.}, at: [< (ptrval)>] __blkdev_get+0xf3/0xf90 [ 1146.798632] [ 1146.800380] ============================================= [ 1146.800380] [ 1146.807395] NMI backtrace for cpu 0 [ 1146.811148] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.111+ #54 [ 1146.817717] Call Trace: [ 1146.820303] dump_stack+0xb9/0x10e [ 1146.823934] ? irq_force_complete_move+0x2d1/0x2e5 [ 1146.828857] nmi_cpu_backtrace.cold+0x47/0x86 [ 1146.833350] ? irq_force_complete_move.cold+0x7b/0x7b [ 1146.838581] ? nmi_trigger_cpumask_backtrace+0x119/0x147 [ 1146.844069] ? watchdog+0x5d3/0xb60 [ 1146.847703] ? reset_hung_task_detector+0x10/0x10 [ 1146.852597] ? kthread+0x310/0x420 [ 1146.856128] ? kthread_create_on_node+0xf0/0xf0 [ 1146.860878] ? ret_from_fork+0x3a/0x50 [ 1146.864874] Sending NMI from CPU 0 to CPUs 1: [ 1146.869416] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff98449332 [ 1146.870376] Kernel panic - not syncing: hung_task: blocked tasks [ 1146.883066] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.111+ #54 [ 1146.889632] Call Trace: [ 1146.892338] dump_stack+0xb9/0x10e [ 1146.895871] panic+0x1d9/0x3c2 [ 1146.899052] ? add_taint.cold+0x16/0x16 [ 1146.903003] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1146.908146] ? cpumask_next+0x1f/0x30 [ 1146.911932] ? printk_safe_flush+0xac/0x110 [ 1146.916245] watchdog+0x5e4/0xb60 [ 1146.919685] ? reset_hung_task_detector+0x10/0x10 [ 1146.924511] kthread+0x310/0x420 [ 1146.927857] ? kthread_create_on_node+0xf0/0xf0 [ 1146.932509] ret_from_fork+0x3a/0x50 [ 1146.936442] Kernel Offset: 0x15c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 1146.947361] Rebooting in 86400 seconds..