Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts. [ 568.957283] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 569.071306] audit: type=1400 audit(1572849182.575:37): avc: denied { map } for pid=7214 comm="syz-executor632" path="/root/syz-executor632114600" 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 [ 574.074255] block nbd0: shutting down sockets [ 858.080210] INFO: task syz-executor632:7215 blocked for more than 140 seconds. [ 858.087792] Not tainted 4.14.151 #0 [ 858.092008] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.099966] syz-executor632 D28048 7215 7214 0x00000004 [ 858.105644] Call Trace: [ 858.108360] __schedule+0x7b8/0x1cd0 [ 858.112141] ? pci_mmcfg_check_reserved+0x150/0x150 [ 858.117160] schedule+0x92/0x1c0 [ 858.120557] schedule_timeout+0x93b/0xe10 [ 858.124703] ? wait_for_completion+0x274/0x420 [ 858.129323] ? find_held_lock+0x35/0x130 [ 858.133496] ? usleep_range+0x130/0x130 [ 858.137463] ? wait_for_completion+0x274/0x420 [ 858.142525] ? _raw_spin_unlock_irq+0x28/0x90 [ 858.147026] ? trace_hardirqs_on_caller+0x400/0x590 [ 858.152094] wait_for_completion+0x27c/0x420 [ 858.156511] ? wait_for_completion_interruptible+0x490/0x490 [ 858.162439] ? wake_up_q+0xf0/0xf0 [ 858.165972] flush_workqueue+0x3d1/0x1400 [ 858.170161] ? uevent_store+0x70/0x70 [ 858.173953] ? flush_work+0x730/0x730 [ 858.177730] ? wait_for_completion+0x420/0x420 [ 858.182342] ? sock_shutdown+0x1d9/0x250 [ 858.186446] nbd_ioctl+0x9c4/0xb30 [ 858.189966] ? nbd_ioctl+0x9c4/0xb30 [ 858.193725] ? nbd_add_socket+0x5e0/0x5e0 [ 858.197885] ? finish_wait+0x260/0x260 [ 858.201810] ? nbd_add_socket+0x5e0/0x5e0 [ 858.205948] blkdev_ioctl+0x96b/0x1860 [ 858.209823] ? blkpg_ioctl+0x980/0x980 [ 858.213764] ? __might_sleep+0x93/0xb0 [ 858.217643] block_ioctl+0xde/0x120 [ 858.221311] ? blkdev_fallocate+0x3b0/0x3b0 [ 858.225620] do_vfs_ioctl+0x7ae/0x1060 [ 858.229574] ? selinux_file_mprotect+0x5d0/0x5d0 [ 858.234407] ? ioctl_preallocate+0x1c0/0x1c0 [ 858.238803] ? putname+0xe0/0x120 [ 858.242291] ? do_sys_open+0x221/0x430 [ 858.246260] ? security_file_ioctl+0x7d/0xb0 [ 858.250813] ? security_file_ioctl+0x89/0xb0 [ 858.255229] SyS_ioctl+0x8f/0xc0 [ 858.258574] ? do_vfs_ioctl+0x1060/0x1060 [ 858.262764] do_syscall_64+0x1e8/0x640 [ 858.266645] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 858.271966] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 858.277140] RIP: 0033:0x4452d9 [ 858.280367] RSP: 002b:00007ffc2d301548 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 858.288079] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004452d9 [ 858.295398] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 [ 858.302696] RBP: 0000000000000000 R08: 00000000004025b0 R09: 00000000004025b0 [ 858.309951] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402520 [ 858.317259] R13: 00000000004025b0 R14: 0000000000000000 R15: 0000000000000000 [ 858.324553] [ 858.324553] Showing all locks held in the system: [ 858.330904] 1 lock held by khungtaskd/1015: [ 858.335296] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f [ 858.344368] 2 locks held by kworker/u5:0/1145: [ 858.348931] #0: ("knbd%d-recv"nbd->index){+.+.}, at: [] process_one_work+0x76e/0x1600 [ 858.358698] #1: ((&args->work)){+.+.}, at: [] process_one_work+0x7ab/0x1600 [ 858.367599] 1 lock held by rsyslogd/6736: [ 858.371770] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xab/0xd0 [ 858.380054] 2 locks held by getty/6858: [ 858.384004] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.392714] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 [ 858.402061] 2 locks held by getty/6859: [ 858.406018] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.415080] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 [ 858.424403] 2 locks held by getty/6860: [ 858.428362] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.437092] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 [ 858.446424] 2 locks held by getty/6861: [ 858.450430] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.459112] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 [ 858.468436] 2 locks held by getty/6862: [ 858.472438] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.481157] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 [ 858.490489] 2 locks held by getty/6863: [ 858.494455] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.503159] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 [ 858.512498] 2 locks held by getty/6864: [ 858.516452] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.525213] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 [ 858.534546] [ 858.536157] ============================================= [ 858.536157] [ 858.543445] NMI backtrace for cpu 0 [ 858.547142] CPU: 0 PID: 1015 Comm: khungtaskd Not tainted 4.14.151 #0 [ 858.553717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 858.563063] Call Trace: [ 858.565706] dump_stack+0x138/0x197 [ 858.569332] nmi_cpu_backtrace.cold+0x57/0x94 [ 858.573818] ? irq_force_complete_move.cold+0x7d/0x7d [ 858.578993] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 858.584256] arch_trigger_cpumask_backtrace+0x14/0x20 [ 858.589423] watchdog+0x5e7/0xb90 [ 858.592876] kthread+0x319/0x430 [ 858.596239] ? hungtask_pm_notify+0x50/0x50 [ 858.600558] ? kthread_create_on_node+0xd0/0xd0 [ 858.605219] ret_from_fork+0x24/0x30 [ 858.609018] Sending NMI from CPU 0 to CPUs 1: [ 858.613580] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff861c3b5e [ 858.614542] Kernel panic - not syncing: hung_task: blocked tasks [ 858.626997] CPU: 0 PID: 1015 Comm: khungtaskd Not tainted 4.14.151 #0 [ 858.633563] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 858.642918] Call Trace: [ 858.645507] dump_stack+0x138/0x197 [ 858.649132] panic+0x1f9/0x42d [ 858.652315] ? add_taint.cold+0x16/0x16 [ 858.656280] ? irq_force_complete_move.cold+0x7d/0x7d [ 858.661462] watchdog+0x5f8/0xb90 [ 858.664901] kthread+0x319/0x430 [ 858.668245] ? hungtask_pm_notify+0x50/0x50 [ 858.672555] ? kthread_create_on_node+0xd0/0xd0 [ 858.677214] ret_from_fork+0x24/0x30 [ 858.682456] Kernel Offset: disabled [ 858.686083] Rebooting in 86400 seconds..