INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "3" 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 [ 999.234552] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.146' (ECDSA) to the list of known hosts. [ 1004.766097] random: sshd: uninitialized urandom read (32 bytes read) [ 1004.859609] audit: type=1400 audit(1552206001.786:8): avc: denied { map } for pid=1945 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 2019/03/10 08:20:02 parsed 1 programs [ 1005.675272] audit: type=1400 audit(1552206002.606:9): avc: denied { map } for pid=1945 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=5005 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 1006.400755] random: cc1: uninitialized urandom read (8 bytes read) 2019/03/10 08:20:04 executed programs: 0 [ 1007.917221] audit: type=1400 audit(1552206004.846:10): avc: denied { map } for pid=1945 comm="syz-execprog" path="/root/syzkaller-shm039843857" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 1288.160189] INFO: task syz-executor.0:1974 blocked for more than 140 seconds. [ 1288.167511] Not tainted 4.14.105+ #29 [ 1288.172470] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.180578] syz-executor.0 D25640 1974 1 0x00000004 [ 1288.186203] Call Trace: [ 1288.188928] ? __schedule+0x91c/0x1f30 [ 1288.193032] ? __sched_text_start+0x8/0x8 [ 1288.197261] ? lock_downgrade+0x5d0/0x5d0 [ 1288.201631] ? lock_acquire+0x10f/0x380 [ 1288.205610] ? __mutex_lock+0x2c1/0x1430 [ 1288.209658] schedule+0x92/0x1c0 [ 1288.213164] schedule_preempt_disabled+0x13/0x20 [ 1288.217939] __mutex_lock+0x559/0x1430 [ 1288.222148] ? blkdev_reread_part+0x1b/0x40 [ 1288.226479] ? mark_held_locks+0xa6/0xf0 [ 1288.230593] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.236044] ? trace_hardirqs_on_caller+0x37b/0x540 [ 1288.241191] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 1288.246369] ? __wake_up_common_lock+0xe0/0x170 [ 1288.251145] ? blk_mq_unfreeze_queue+0x38/0x70 [ 1288.255732] ? blkdev_reread_part+0x1b/0x40 [ 1288.260112] blkdev_reread_part+0x1b/0x40 [ 1288.264347] loop_reread_partitions+0x72/0x80 [ 1288.268837] loop_clr_fd+0x828/0xac0 [ 1288.272623] lo_ioctl+0x813/0x1970 [ 1288.276233] ? kasan_slab_free+0xb0/0x190 [ 1288.280459] ? kmem_cache_free+0xc4/0x330 [ 1288.284682] ? putname+0xcd/0x110 [ 1288.288126] ? do_sys_open+0x250/0x590 [ 1288.292121] ? do_syscall_64+0x19b/0x4b0 [ 1288.296198] ? loop_clr_fd+0xac0/0xac0 [ 1288.300143] blkdev_ioctl+0x4d9/0x1810 [ 1288.304033] ? blkpg_ioctl+0x910/0x910 [ 1288.307904] ? lock_downgrade+0x5d0/0x5d0 [ 1288.312118] ? lock_acquire+0x10f/0x380 [ 1288.316150] ? debug_check_no_obj_freed+0x148/0x5c0 [ 1288.321244] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1288.326356] ? trace_hardirqs_on_caller+0x37b/0x540 [ 1288.331512] block_ioctl+0xd9/0x120 [ 1288.335142] ? blkdev_fallocate+0x3b0/0x3b0 [ 1288.339448] do_vfs_ioctl+0xabe/0x1040 [ 1288.343482] ? selinux_file_ioctl+0x426/0x590 [ 1288.348001] ? selinux_file_ioctl+0x116/0x590 [ 1288.352630] ? ioctl_preallocate+0x1e0/0x1e0 [ 1288.357048] ? selinux_parse_skb.constprop.0+0x16b0/0x16b0 [ 1288.362789] ? rcu_read_lock_sched_held+0x10a/0x130 [ 1288.367812] ? putname+0xcd/0x110 [ 1288.371316] ? do_sys_open+0x255/0x590 [ 1288.375201] ? filp_open+0x60/0x60 [ 1288.378775] ? security_file_ioctl+0x7c/0xb0 [ 1288.383358] SyS_ioctl+0x7f/0xb0 [ 1288.386737] ? do_vfs_ioctl+0x1040/0x1040 [ 1288.391023] do_syscall_64+0x19b/0x4b0 [ 1288.394957] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1288.400475] INFO: task blkid:2947 blocked for more than 140 seconds. [ 1288.406978] Not tainted 4.14.105+ #29 [ 1288.411407] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.419381] blkid D28664 2947 2907 0x00000004 [ 1288.425082] Call Trace: [ 1288.427833] ? __schedule+0x91c/0x1f30 [ 1288.431810] ? __sched_text_start+0x8/0x8 [ 1288.435965] ? lock_downgrade+0x5d0/0x5d0 [ 1288.440166] ? lock_acquire+0x10f/0x380 [ 1288.444128] ? __mutex_lock+0x2c1/0x1430 [ 1288.448183] schedule+0x92/0x1c0 [ 1288.451637] schedule_preempt_disabled+0x13/0x20 [ 1288.456390] __mutex_lock+0x559/0x1430 [ 1288.460330] ? trace_hardirqs_on+0x10/0x10 [ 1288.464562] ? lo_release+0x78/0x190 [ 1288.468272] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.473812] ? lock_downgrade+0x5d0/0x5d0 [ 1288.477953] ? lock_acquire+0x10f/0x380 [ 1288.481975] ? __blkdev_put+0x1cb/0x6d0 [ 1288.485948] ? lo_compat_ioctl+0x130/0x130 [ 1288.490228] ? lo_release+0x78/0x190 [ 1288.493935] lo_release+0x78/0x190 [ 1288.497456] ? lo_compat_ioctl+0x130/0x130 [ 1288.501738] __blkdev_put+0x518/0x6d0 [ 1288.505553] ? bd_set_size+0xb0/0xb0 [ 1288.509252] ? blkdev_put+0x75/0x4c0 [ 1288.513039] ? blkdev_put+0x4c0/0x4c0 [ 1288.516834] blkdev_close+0x86/0xb0 [ 1288.520508] __fput+0x25e/0x700 [ 1288.523841] task_work_run+0x118/0x190 [ 1288.527714] exit_to_usermode_loop+0x13b/0x160 [ 1288.532362] do_syscall_64+0x372/0x4b0 [ 1288.536251] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1288.541696] INFO: task blkid:2951 blocked for more than 140 seconds. [ 1288.548187] Not tainted 4.14.105+ #29 [ 1288.552552] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.560547] blkid D29128 2951 2931 0x00000004 [ 1288.566167] Call Trace: [ 1288.568747] ? __schedule+0x91c/0x1f30 [ 1288.572696] ? __sched_text_start+0x8/0x8 [ 1288.576848] ? lock_downgrade+0x5d0/0x5d0 [ 1288.581045] ? lock_acquire+0x10f/0x380 [ 1288.585018] ? __mutex_lock+0x2c1/0x1430 [ 1288.589077] schedule+0x92/0x1c0 [ 1288.592540] schedule_preempt_disabled+0x13/0x20 [ 1288.597305] __mutex_lock+0x559/0x1430 [ 1288.601250] ? __mutex_lock+0x6aa/0x1430 [ 1288.605314] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1288.610242] ? lo_open+0x19/0xb0 [ 1288.613617] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.619063] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.624828] ? kobject_get_unless_zero+0x27/0x40 [ 1288.629610] ? lock_downgrade+0x5d0/0x5d0 [ 1288.633840] ? refcount_inc_not_zero+0x81/0xe0 [ 1288.638425] ? check_preemption_disabled+0x35/0x1f0 [ 1288.643508] ? loop_unregister_transfer+0x90/0x90 [ 1288.648351] ? lo_open+0x19/0xb0 [ 1288.651764] lo_open+0x19/0xb0 [ 1288.655009] __blkdev_get+0x267/0xf90 [ 1288.658810] ? __blkdev_put+0x6d0/0x6d0 [ 1288.662907] ? fsnotify+0x8b0/0x1150 [ 1288.666628] blkdev_get+0x97/0x8b0 [ 1288.670217] ? bd_acquire+0x171/0x2c0 [ 1288.674118] ? bd_may_claim+0xd0/0xd0 [ 1288.677902] ? lock_downgrade+0x5d0/0x5d0 [ 1288.682131] ? lock_acquire+0x10f/0x380 [ 1288.686109] ? bd_acquire+0x21/0x2c0 [ 1288.689812] blkdev_open+0x1cc/0x250 [ 1288.693601] ? security_file_open+0x88/0x190 [ 1288.698012] do_dentry_open+0x41b/0xd60 [ 1288.702051] ? bd_acquire+0x2c0/0x2c0 [ 1288.705854] vfs_open+0x105/0x230 [ 1288.709303] path_openat+0xb6b/0x2b70 [ 1288.713175] ? path_mountpoint+0x9a0/0x9a0 [ 1288.717411] ? trace_hardirqs_on+0x10/0x10 [ 1288.721765] do_filp_open+0x1a1/0x280 [ 1288.725570] ? may_open_dev+0xe0/0xe0 [ 1288.729357] ? lock_downgrade+0x5d0/0x5d0 [ 1288.733568] ? lock_acquire+0x10f/0x380 [ 1288.737594] ? __alloc_fd+0x3f/0x490 [ 1288.741369] ? _raw_spin_unlock+0x29/0x40 [ 1288.745783] ? __alloc_fd+0x1bf/0x490 [ 1288.749606] do_sys_open+0x2ca/0x590 [ 1288.753484] ? filp_open+0x60/0x60 [ 1288.757034] ? do_syscall_64+0x43/0x4b0 [ 1288.761060] ? do_sys_open+0x590/0x590 [ 1288.764948] do_syscall_64+0x19b/0x4b0 [ 1288.768822] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1288.774275] INFO: task blkid:2952 blocked for more than 140 seconds. [ 1288.780805] Not tainted 4.14.105+ #29 [ 1288.785104] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.793225] blkid D27800 2952 2933 0x00000004 [ 1288.798866] Call Trace: [ 1288.801552] ? __schedule+0x91c/0x1f30 [ 1288.805492] ? __sched_text_start+0x8/0x8 [ 1288.809642] ? lock_downgrade+0x5d0/0x5d0 [ 1288.813881] ? lock_acquire+0x10f/0x380 [ 1288.817858] ? __mutex_lock+0x2c1/0x1430 [ 1288.821985] schedule+0x92/0x1c0 [ 1288.825362] schedule_preempt_disabled+0x13/0x20 [ 1288.830316] __mutex_lock+0x559/0x1430 [ 1288.834204] ? __mutex_lock+0x6aa/0x1430 [ 1288.838247] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1288.843171] ? lo_open+0x19/0xb0 [ 1288.846545] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.852192] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.857664] ? kobject_get_unless_zero+0x27/0x40 [ 1288.862518] ? lock_downgrade+0x5d0/0x5d0 [ 1288.866672] ? refcount_inc_not_zero+0x81/0xe0 [ 1288.871339] ? check_preemption_disabled+0x35/0x1f0 [ 1288.876366] ? loop_unregister_transfer+0x90/0x90 [ 1288.881253] ? lo_open+0x19/0xb0 [ 1288.884655] lo_open+0x19/0xb0 [ 1288.887835] __blkdev_get+0x267/0xf90 [ 1288.891709] ? __blkdev_put+0x6d0/0x6d0 [ 1288.895691] ? fsnotify+0x8b0/0x1150 [ 1288.899389] blkdev_get+0x97/0x8b0 [ 1288.902999] ? bd_acquire+0x171/0x2c0 [ 1288.906798] ? bd_may_claim+0xd0/0xd0 [ 1288.910638] ? lock_downgrade+0x5d0/0x5d0 [ 1288.914779] ? lock_acquire+0x10f/0x380 [ 1288.918742] ? bd_acquire+0x21/0x2c0 [ 1288.922537] blkdev_open+0x1cc/0x250 [ 1288.926246] ? security_file_open+0x88/0x190 [ 1288.930809] do_dentry_open+0x41b/0xd60 [ 1288.934789] ? bd_acquire+0x2c0/0x2c0 [ 1288.938574] vfs_open+0x105/0x230 [ 1288.942095] path_openat+0xb6b/0x2b70 [ 1288.945965] ? path_mountpoint+0x9a0/0x9a0 [ 1288.950268] ? trace_hardirqs_on+0x10/0x10 [ 1288.954516] do_filp_open+0x1a1/0x280 [ 1288.958304] ? may_open_dev+0xe0/0xe0 [ 1288.962175] ? lock_downgrade+0x5d0/0x5d0 [ 1288.966321] ? lock_acquire+0x10f/0x380 [ 1288.970354] ? __alloc_fd+0x3f/0x490 [ 1288.974068] ? _raw_spin_unlock+0x29/0x40 [ 1288.978197] ? __alloc_fd+0x1bf/0x490 [ 1288.982062] do_sys_open+0x2ca/0x590 [ 1288.985777] ? filp_open+0x60/0x60 [ 1288.989308] ? do_syscall_64+0x43/0x4b0 [ 1288.993342] ? do_sys_open+0x590/0x590 [ 1288.997236] do_syscall_64+0x19b/0x4b0 [ 1289.001178] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1289.006550] INFO: task syz-executor.4:2953 blocked for more than 140 seconds. [ 1289.013902] Not tainted 4.14.105+ #29 [ 1289.018217] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1289.026247] syz-executor.4 D28808 2953 1971 0x00000004 [ 1289.031913] Call Trace: [ 1289.034492] ? __schedule+0x91c/0x1f30 [ 1289.038373] ? __sched_text_start+0x8/0x8 [ 1289.042585] ? lock_downgrade+0x5d0/0x5d0 [ 1289.046737] ? lock_acquire+0x10f/0x380 [ 1289.050766] ? __mutex_lock+0x2c1/0x1430 [ 1289.054829] schedule+0x92/0x1c0 [ 1289.058179] schedule_preempt_disabled+0x13/0x20 [ 1289.063006] __mutex_lock+0x559/0x1430 [ 1289.066900] ? __mutex_lock+0x6aa/0x1430 [ 1289.071028] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1289.075870] ? lo_open+0x19/0xb0 [ 1289.079231] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1289.084737] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1289.090413] ? kobject_get_unless_zero+0x27/0x40 [ 1289.095157] ? get_disk+0xd0/0xd0 [ 1289.098605] ? exact_match+0x9/0x20 [ 1289.102319] ? blkdev_ioctl+0x1810/0x1810 [ 1289.106516] ? loop_unregister_transfer+0x90/0x90 [ 1289.111420] ? lo_open+0x19/0xb0 [ 1289.114783] lo_open+0x19/0xb0 [ 1289.117956] __blkdev_get+0x963/0xf90 [ 1289.121886] ? __blkdev_put+0x6d0/0x6d0 [ 1289.125858] ? blkdev_get+0x1f6/0x8b0 [ 1289.129639] blkdev_get+0x44b/0x8b0 [ 1289.133327] ? bd_may_claim+0xd0/0xd0 [ 1289.137121] ? lock_downgrade+0x5d0/0x5d0 [ 1289.141311] ? bd_acquire+0x21/0x2c0 [ 1289.145026] blkdev_open+0x1cc/0x250 [ 1289.148720] ? security_file_open+0x88/0x190 [ 1289.153183] do_dentry_open+0x41b/0xd60 [ 1289.157162] ? bd_acquire+0x2c0/0x2c0 [ 1289.161023] vfs_open+0x105/0x230 [ 1289.164475] path_openat+0xb6b/0x2b70 [ 1289.168359] ? path_mountpoint+0x9a0/0x9a0 [ 1289.172667] ? trace_hardirqs_on+0x10/0x10 [ 1289.176903] do_filp_open+0x1a1/0x280 [ 1289.180758] ? may_open_dev+0xe0/0xe0 [ 1289.184564] ? lock_downgrade+0x5d0/0x5d0 [ 1289.188837] ? lock_acquire+0x10f/0x380 [ 1289.192875] ? __alloc_fd+0x3f/0x490 [ 1289.196589] ? _raw_spin_unlock+0x29/0x40 [ 1289.200854] ? __alloc_fd+0x1bf/0x490 [ 1289.204657] do_sys_open+0x2ca/0x590 [ 1289.208353] ? filp_open+0x60/0x60 [ 1289.211961] ? do_syscall_64+0x43/0x4b0 [ 1289.215932] ? do_sys_open+0x590/0x590 [ 1289.219803] do_syscall_64+0x19b/0x4b0 [ 1289.223766] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1289.229145] INFO: task blkid:2955 blocked for more than 140 seconds. [ 1289.235708] Not tainted 4.14.105+ #29 [ 1289.240048] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1289.248005] blkid D28760 2955 296 0x00000004 [ 1289.253702] Call Trace: [ 1289.256398] ? __schedule+0x91c/0x1f30 [ 1289.260348] ? __sched_text_start+0x8/0x8 [ 1289.264497] ? lock_downgrade+0x5d0/0x5d0 [ 1289.268622] ? lock_acquire+0x10f/0x380 [ 1289.272713] ? __mutex_lock+0x2c1/0x1430 [ 1289.276782] schedule+0x92/0x1c0 [ 1289.280323] schedule_preempt_disabled+0x13/0x20 [ 1289.285079] __mutex_lock+0x559/0x1430 [ 1289.288948] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 1289.293857] ? trace_hardirqs_on+0x10/0x10 [ 1289.298087] ? __blkdev_get+0xf3/0xf90 [ 1289.302149] ? refcount_inc_not_zero+0x81/0xe0 [ 1289.306736] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1289.312243] ? kobject_get_unless_zero+0x27/0x40 [ 1289.316996] ? get_disk+0xd0/0xd0 [ 1289.320510] ? exact_match+0x9/0x20 [ 1289.324189] ? kobj_lookup+0x325/0x410 [ 1289.328071] ? blkdev_ioctl+0x1810/0x1810 [ 1289.332332] ? __blkdev_get+0xf3/0xf90 [ 1289.336215] __blkdev_get+0xf3/0xf90 [ 1289.339920] ? __blkdev_put+0x6d0/0x6d0 [ 1289.343970] ? fsnotify+0x8b0/0x1150 [ 1289.347680] blkdev_get+0x97/0x8b0 [ 1289.351256] ? bd_acquire+0x171/0x2c0 [ 1289.355060] ? bd_may_claim+0xd0/0xd0 [ 1289.358847] ? lock_downgrade+0x5d0/0x5d0 [ 1289.363053] ? lock_acquire+0x10f/0x380 [ 1289.367020] ? bd_acquire+0x21/0x2c0 [ 1289.370827] blkdev_open+0x1cc/0x250 [ 1289.374541] ? security_file_open+0x88/0x190 [ 1289.379068] do_dentry_open+0x41b/0xd60 [ 1289.383104] ? bd_acquire+0x2c0/0x2c0 [ 1289.386909] vfs_open+0x105/0x230 [ 1289.390404] path_openat+0xb6b/0x2b70 [ 1289.394209] ? path_mountpoint+0x9a0/0x9a0 [ 1289.398424] ? trace_hardirqs_on+0x10/0x10 [ 1289.402723] do_filp_open+0x1a1/0x280 [ 1289.406606] ? may_open_dev+0xe0/0xe0 [ 1289.410482] ? lock_downgrade+0x5d0/0x5d0 [ 1289.414631] ? lock_acquire+0x10f/0x380 [ 1289.418595] ? __alloc_fd+0x3f/0x490 [ 1289.422391] ? _raw_spin_unlock+0x29/0x40 [ 1289.426545] ? __alloc_fd+0x1bf/0x490 [ 1289.430453] do_sys_open+0x2ca/0x590 [ 1289.434169] ? filp_open+0x60/0x60 [ 1289.437695] ? do_syscall_64+0x43/0x4b0 [ 1289.441751] ? do_sys_open+0x590/0x590 [ 1289.445641] do_syscall_64+0x19b/0x4b0 [ 1289.449513] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1289.454969] [ 1289.454969] Showing all locks held in the system: [ 1289.461388] 1 lock held by khungtaskd/23: [ 1289.465558] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1289.474716] 2 locks held by getty/1753: [ 1289.478686] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1289.487744] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 [ 1289.497124] 2 locks held by syz-executor.0/1974: [ 1289.501938] #0: (loop_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x83/0x1970 [ 1289.510333] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 [ 1289.519272] 3 locks held by blkid/2947: [ 1289.523330] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_put+0xb1/0x6d0 [ 1289.531882] #1: (loop_index_mutex){+.+.}, at: [] lo_release+0x19/0x190 [ 1289.540380] #2: (loop_ctl_mutex#2){+.+.}, at: [] lo_release+0x78/0x190 [ 1289.549048] 2 locks held by blkid/2951: [ 1289.553094] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xf90 [ 1289.563916] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 1289.572082] 2 locks held by blkid/2952: [ 1289.576148] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xf90 [ 1289.584759] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 1289.592898] 2 locks held by syz-executor.4/2953: [ 1289.597639] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xf90 [ 1289.607931] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 1289.616064] 1 lock held by blkid/2955: [ 1289.619938] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xf90 [ 1289.628527] [ 1289.630175] ============================================= [ 1289.630175] [ 1289.637168] NMI backtrace for cpu 0 [ 1289.640840] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #29 [ 1289.647419] Call Trace: [ 1289.649995] dump_stack+0xb9/0x10e [ 1289.653711] ? irq_force_complete_move+0x2c1/0x2e5 [ 1289.658628] nmi_cpu_backtrace.cold+0x47/0x86 [ 1289.663102] ? irq_force_complete_move.cold+0x7b/0x7b [ 1289.668296] ? nmi_trigger_cpumask_backtrace+0x119/0x147 [ 1289.673793] ? watchdog+0x5d3/0xb60 [ 1289.677404] ? reset_hung_task_detector+0x10/0x10 [ 1289.682228] ? kthread+0x310/0x420 [ 1289.685780] ? kthread_create_on_node+0xf0/0xf0 [ 1289.690793] ? ret_from_fork+0x3a/0x50 [ 1289.694755] Sending NMI from CPU 0 to CPUs 1: [ 1289.699303] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff856430b2 [ 1289.700252] Kernel panic - not syncing: hung_task: blocked tasks [ 1289.712736] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #29 [ 1289.719303] Call Trace: [ 1289.721881] dump_stack+0xb9/0x10e [ 1289.725450] panic+0x1d9/0x3c2 [ 1289.728627] ? add_taint.cold+0x16/0x16 [ 1289.732582] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1289.737667] ? cpumask_next+0x1f/0x30 [ 1289.741446] ? printk_safe_flush+0xac/0x110 [ 1289.745854] watchdog+0x5e4/0xb60 [ 1289.749303] ? reset_hung_task_detector+0x10/0x10 [ 1289.754135] kthread+0x310/0x420 [ 1289.757487] ? kthread_create_on_node+0xf0/0xf0 [ 1289.762140] ret_from_fork+0x3a/0x50 [ 1289.766166] Kernel Offset: 0x2e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 1289.778389] Rebooting in 86400 seconds..