Warning: Permanently added '10.128.0.66' (ECDSA) to the list of known hosts. [ 660.964123] random: sshd: uninitialized urandom read (32 bytes read) [ 661.046819] audit: type=1400 audit(1551985265.008:7): avc: denied { map } for pid=1892 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 2019/03/07 19:01:05 parsed 1 programs [ 661.827576] audit: type=1400 audit(1551985265.788:8): avc: denied { map } for pid=1892 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 [ 662.546159] random: cc1: uninitialized urandom read (8 bytes read) 2019/03/07 19:01:08 executed programs: 0 [ 664.236837] audit: type=1400 audit(1551985268.198:9): avc: denied { map } for pid=1892 comm="syz-execprog" path="/root/syzkaller-shm854888104" 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 [ 858.080160] INFO: task syz-executor.0:2119 blocked for more than 140 seconds. [ 858.087455] Not tainted 4.14.105+ #27 [ 858.092220] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.100204] syz-executor.0 D28688 2119 1906 0x00000004 [ 858.105821] Call Trace: [ 858.108394] ? __schedule+0x91c/0x1f30 [ 858.112413] ? __sched_text_start+0x8/0x8 [ 858.116565] ? lock_downgrade+0x5d0/0x5d0 [ 858.120861] ? lock_acquire+0x10f/0x380 [ 858.124826] ? __mutex_lock+0x2c1/0x1430 [ 858.128978] schedule+0x92/0x1c0 [ 858.132674] schedule_preempt_disabled+0x13/0x20 [ 858.137520] __mutex_lock+0x559/0x1430 [ 858.141519] ? blkdev_reread_part+0x1b/0x40 [ 858.145853] ? mark_lock+0xfa0/0xfa0 [ 858.149560] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.155173] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 858.160290] ? __wake_up_common_lock+0xe0/0x170 [ 858.164991] ? blkdev_reread_part+0x1b/0x40 [ 858.169307] blkdev_reread_part+0x1b/0x40 [ 858.173624] loop_reread_partitions+0x72/0x80 [ 858.178115] loop_set_status+0xbff/0x11f0 [ 858.182378] ? loop_set_status64+0xa5/0x100 [ 858.186685] ? loop_set_status_old+0x2f0/0x2f0 [ 858.191511] ? lo_ioctl+0x83/0x1970 [ 858.195198] ? lo_ioctl+0x50b/0x1970 [ 858.198899] ? __lock_acquire+0x56a/0x3fa0 [ 858.203202] ? loop_clr_fd+0xac0/0xac0 [ 858.207077] ? blkdev_ioctl+0x4d9/0x1810 [ 858.211206] ? blkpg_ioctl+0x910/0x910 [ 858.215149] ? trace_hardirqs_on+0x10/0x10 [ 858.219467] ? __lock_acquire+0x56a/0x3fa0 [ 858.223829] ? locks_remove_posix+0x24c/0x4d0 [ 858.228438] ? exit_robust_list+0x210/0x210 [ 858.232834] ? block_ioctl+0xd9/0x120 [ 858.236631] ? blkdev_fallocate+0x3b0/0x3b0 [ 858.241021] ? do_vfs_ioctl+0xabe/0x1040 [ 858.245083] ? selinux_file_ioctl+0x426/0x590 [ 858.249586] ? selinux_file_ioctl+0x116/0x590 [ 858.254236] ? ioctl_preallocate+0x1e0/0x1e0 [ 858.258821] ? selinux_parse_skb.constprop.0+0x16b0/0x16b0 [ 858.264606] ? __might_fault+0x177/0x1b0 [ 858.268681] ? _copy_to_user+0x82/0xd0 [ 858.272626] ? nsecs_to_jiffies+0x30/0x30 [ 858.276891] ? security_file_ioctl+0x7c/0xb0 [ 858.281385] ? SyS_ioctl+0x7f/0xb0 [ 858.284926] ? do_vfs_ioctl+0x1040/0x1040 [ 858.289056] ? do_syscall_64+0x19b/0x4b0 [ 858.293182] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 858.298564] INFO: task blkid:2120 blocked for more than 140 seconds. [ 858.305102] Not tainted 4.14.105+ #27 [ 858.309413] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.317432] blkid D28808 2120 340 0x00000004 [ 858.323082] Call Trace: [ 858.325658] ? __schedule+0x91c/0x1f30 [ 858.329529] ? __sched_text_start+0x8/0x8 [ 858.333729] ? lock_downgrade+0x5d0/0x5d0 [ 858.337888] ? lock_acquire+0x10f/0x380 [ 858.341905] ? __mutex_lock+0x2c1/0x1430 [ 858.345964] schedule+0x92/0x1c0 [ 858.349324] schedule_preempt_disabled+0x13/0x20 [ 858.354124] __mutex_lock+0x559/0x1430 [ 858.358008] ? trace_hardirqs_on+0x10/0x10 [ 858.362270] ? lo_release+0x78/0x190 [ 858.365982] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.371530] ? lock_downgrade+0x5d0/0x5d0 [ 858.375720] ? lock_acquire+0x10f/0x380 [ 858.379681] ? __blkdev_put+0x1cb/0x6d0 [ 858.383699] ? lo_compat_ioctl+0x130/0x130 [ 858.387999] ? lo_release+0x78/0x190 [ 858.391771] lo_release+0x78/0x190 [ 858.395309] ? lo_compat_ioctl+0x130/0x130 [ 858.399521] __blkdev_put+0x518/0x6d0 [ 858.403366] ? bd_set_size+0xb0/0xb0 [ 858.407077] ? blkdev_put+0x75/0x4c0 [ 858.410816] ? blkdev_put+0x4c0/0x4c0 [ 858.414616] blkdev_close+0x86/0xb0 [ 858.418224] __fput+0x25e/0x700 [ 858.421567] task_work_run+0x118/0x190 [ 858.425457] exit_to_usermode_loop+0x13b/0x160 [ 858.430096] do_syscall_64+0x372/0x4b0 [ 858.433991] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 858.439348] INFO: task blkid:2122 blocked for more than 140 seconds. [ 858.445900] Not tainted 4.14.105+ #27 [ 858.450249] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.458194] blkid D27216 2122 339 0x00000004 [ 858.463868] Call Trace: [ 858.466517] ? __schedule+0x91c/0x1f30 [ 858.470461] ? __sched_text_start+0x8/0x8 [ 858.474608] ? lock_downgrade+0x5d0/0x5d0 [ 858.478780] ? lock_acquire+0x10f/0x380 [ 858.482794] ? __mutex_lock+0x2c1/0x1430 [ 858.486852] schedule+0x92/0x1c0 [ 858.490262] schedule_preempt_disabled+0x13/0x20 [ 858.495017] __mutex_lock+0x559/0x1430 [ 858.498890] ? __mutex_lock+0x6aa/0x1430 [ 858.502981] ? __mutex_unlock_slowpath+0x9a/0x7d0 [ 858.507808] ? lo_open+0x19/0xb0 [ 858.511338] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.516792] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.522283] ? kobject_get_unless_zero+0x27/0x40 [ 858.527036] ? get_disk+0xd0/0xd0 [ 858.530579] ? exact_match+0x9/0x20 [ 858.534211] ? blkdev_ioctl+0x1810/0x1810 [ 858.538411] ? loop_unregister_transfer+0x90/0x90 [ 858.543300] ? lo_open+0x19/0xb0 [ 858.546656] lo_open+0x19/0xb0 [ 858.549828] __blkdev_get+0x963/0xf90 [ 858.553913] ? __blkdev_put+0x6d0/0x6d0 [ 858.557892] ? fsnotify+0x8b0/0x1150 [ 858.561637] blkdev_get+0x97/0x8b0 [ 858.565176] ? bd_acquire+0x171/0x2c0 [ 858.568955] ? bd_may_claim+0xd0/0xd0 [ 858.572782] ? lock_downgrade+0x5d0/0x5d0 [ 858.576927] ? lock_acquire+0x10f/0x380 [ 858.580943] ? bd_acquire+0x21/0x2c0 [ 858.584711] blkdev_open+0x1cc/0x250 [ 858.588414] ? security_file_open+0x88/0x190 [ 858.592871] do_dentry_open+0x41b/0xd60 [ 858.596919] ? bd_acquire+0x2c0/0x2c0 [ 858.600822] vfs_open+0x105/0x230 [ 858.604284] path_openat+0xb6b/0x2b70 [ 858.608074] ? path_mountpoint+0x9a0/0x9a0 [ 858.612375] ? trace_hardirqs_on+0x10/0x10 [ 858.616622] do_filp_open+0x1a1/0x280 [ 858.620469] ? may_open_dev+0xe0/0xe0 [ 858.624283] ? lock_downgrade+0x5d0/0x5d0 [ 858.628405] ? lock_acquire+0x10f/0x380 [ 858.632464] ? __alloc_fd+0x3f/0x490 [ 858.636185] ? _raw_spin_unlock+0x29/0x40 [ 858.640372] ? __alloc_fd+0x1bf/0x490 [ 858.644209] do_sys_open+0x2ca/0x590 [ 858.647907] ? filp_open+0x60/0x60 [ 858.651491] ? do_syscall_64+0x43/0x4b0 [ 858.655458] ? do_sys_open+0x590/0x590 [ 858.659325] do_syscall_64+0x19b/0x4b0 [ 858.663251] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 858.668705] [ 858.668705] Showing all locks held in the system: [ 858.675063] 1 lock held by khungtaskd/23: [ 858.679240] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 858.688317] 2 locks held by getty/1763: [ 858.692310] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 858.701270] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 [ 858.710588] 2 locks held by syz-executor.0/2119: [ 858.715440] #0: (loop_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x83/0x1970 [ 858.723857] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 [ 858.732901] 3 locks held by blkid/2120: [ 858.736886] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_put+0xb1/0x6d0 [ 858.745529] #1: (loop_index_mutex){+.+.}, at: [] lo_release+0x19/0x190 [ 858.754108] #2: (loop_ctl_mutex#2){+.+.}, at: [] lo_release+0x78/0x190 [ 858.762631] 2 locks held by blkid/2122: [ 858.766598] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xf90 [ 858.775140] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 858.783309] [ 858.784937] ============================================= [ 858.784937] [ 858.792079] NMI backtrace for cpu 0 [ 858.795705] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #27 [ 858.802260] Call Trace: [ 858.804839] dump_stack+0xb9/0x10e [ 858.808361] ? irq_force_complete_move+0x2c1/0x2e5 [ 858.813266] nmi_cpu_backtrace.cold+0x47/0x86 [ 858.817737] ? irq_force_complete_move.cold+0x7b/0x7b [ 858.822997] ? nmi_trigger_cpumask_backtrace+0x119/0x147 [ 858.828430] ? watchdog+0x5d3/0xb60 [ 858.832035] ? reset_hung_task_detector+0x10/0x10 [ 858.836863] ? kthread+0x310/0x420 [ 858.840387] ? kthread_create_on_node+0xf0/0xf0 [ 858.845035] ? ret_from_fork+0x3a/0x50 [ 858.848997] Sending NMI from CPU 0 to CPUs 1: [ 858.853563] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff9a6430b2 [ 858.854518] Kernel panic - not syncing: hung_task: blocked tasks [ 858.866897] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #27 [ 858.873448] Call Trace: [ 858.876017] dump_stack+0xb9/0x10e [ 858.879541] panic+0x1d9/0x3c2 [ 858.882893] ? add_taint.cold+0x16/0x16 [ 858.886845] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 858.891933] ? cpumask_next+0x1f/0x30 [ 858.895719] ? printk_safe_flush+0xac/0x110 [ 858.900073] watchdog+0x5e4/0xb60 [ 858.903517] ? reset_hung_task_detector+0x10/0x10 [ 858.908356] kthread+0x310/0x420 [ 858.911708] ? kthread_create_on_node+0xf0/0xf0 [ 858.916363] ret_from_fork+0x3a/0x50 [ 858.920388] Kernel Offset: 0x17e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 858.931304] Rebooting in 86400 seconds..