INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes [ 433.137586] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts. [ 438.544791] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program [ 472.955890] random: crng init done INIT: Id "6" 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 "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes [ 613.734744] INFO: task syz-executor252:3870 blocked for more than 120 seconds. [ 613.742138] Not tainted 4.9.103-g70c65e4 #37 [ 613.747377] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.755498] syz-executor252 D27176 3870 3868 0x00000000 [ 613.761324] ffff8801b5588000 0000000000000000 ffff8801b5aa3480 ffffffff84629800 [ 613.769449] ffff8801db221c18 ffff8801b55579f0 ffffffff839e711d 0000000000000002 [ 613.777568] 0000000041b58ab3 ffffffff843b9803 00ffffff81221330 ffff8801db2224e8 [ 613.785702] Call Trace: [ 613.788341] [] ? __schedule+0x64d/0x1bd0 [ 613.794034] [] schedule+0x7f/0x1b0 [ 613.799298] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.806072] [] ? plug_ctx_cmp+0x100/0x100 [ 613.811920] [] ? prepare_to_wait_event+0x450/0x450 [ 613.818664] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.824776] [] lo_ioctl+0x722/0x1aa0 [ 613.830124] [] ? loop_lookup.part.19+0x110/0x110 [ 613.836571] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.842276] [] ? blkpg_ioctl+0x920/0x920 [ 613.848065] [] ? fsnotify+0x114/0x1100 [ 613.853623] [] ? mark_held_locks+0xc7/0x130 [ 613.859660] [] block_ioctl+0xde/0x120 [ 613.865124] [] ? blkdev_fallocate+0x440/0x440 [ 613.871297] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.877055] [] ? ioctl_preallocate+0x220/0x220 [ 613.883318] [] ? selinux_capable+0x40/0x40 [ 613.889238] [] ? __lock_is_held+0xa2/0xf0 [ 613.895096] [] ? do_sys_ftruncate.constprop.16+0x373/0x4a0 [ 613.902496] [] ? security_file_ioctl+0x8f/0xc0 [ 613.908759] [] SyS_ioctl+0x8f/0xc0 [ 613.913932] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.919952] [] do_syscall_64+0x1a6/0x490 [ 613.925724] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.932636] [ 613.932636] Showing all locks held in the system: [ 613.939427] 2 locks held by khungtaskd/520: [ 613.943731] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.952554] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.962329] 1 lock held by rsyslogd/3680: [ 613.966516] #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 [ 613.975434] 2 locks held by getty/3776: [ 613.979382] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.988759] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.998982] 1 lock held by syz-executor252/3870: [ 614.003712] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 614.013142] [ 614.014792] ============================================= [ 614.014792] [ 614.021911] NMI backtrace for cpu 1 [ 614.025546] CPU: 1 PID: 520 Comm: khungtaskd Not tainted 4.9.103-g70c65e4 #37 [ 614.032796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.042137] ffff8801d8657d08 ffffffff81eb3469 0000000000000000 0000000000000001 [ 614.050178] 0000000000000001 0000000000000001 ffffffff810b9590 ffff8801d8657d40 [ 614.058176] ffffffff81ebe767 0000000000000001 0000000000000000 0000000000000003 [ 614.066269] Call Trace: [ 614.068890] [] dump_stack+0xc1/0x128 [ 614.074262] [] ? irq_force_complete_move+0x320/0x320 [ 614.081026] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.087510] [] ? irq_force_complete_move+0x320/0x320 [ 614.094252] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.101422] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.108423] [] watchdog+0x6b4/0xa20 [ 614.113694] [] ? watchdog+0x11c/0xa20 [ 614.119180] [] kthread+0x26d/0x300 [ 614.124360] [] ? reset_hung_task_detector+0x20/0x20 [ 614.131009] [] ? kthread_park+0xa0/0xa0 [ 614.136613] [] ? kthread_park+0xa0/0xa0 [ 614.142223] [] ? kthread_park+0xa0/0xa0 [ 614.147922] [] ret_from_fork+0x5c/0x70 [ 614.153528] Sending NMI from CPU 1 to CPUs 0: [ 614.158071] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f6c26 [ 614.165355] Kernel panic - not syncing: hung_task: blocked tasks [ 614.171510] CPU: 1 PID: 520 Comm: khungtaskd Not tainted 4.9.103-g70c65e4 #37 [ 614.178766] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.188103] ffff8801d8657cc8 ffffffff81eb3469 ffffffff83c8bb80 00000000ffffffff [ 614.196121] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d8657d88 [ 614.204179] ffffffff81421aa5 0000000041b58ab3 ffffffff843b94a8 ffffffff814218e6 [ 614.212192] Call Trace: [ 614.214757] [] dump_stack+0xc1/0x128 [ 614.220098] [] panic+0x1bf/0x3bc [ 614.225088] [] ? add_taint.cold.6+0x16/0x16 [ 614.231037] [] ? ___preempt_schedule+0x16/0x18 [ 614.237253] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.244598] [] watchdog+0x6c5/0xa20 [ 614.249852] [] ? watchdog+0x11c/0xa20 [ 614.255288] [] kthread+0x26d/0x300 [ 614.260460] [] ? reset_hung_task_detector+0x20/0x20 [ 614.267108] [] ? kthread_park+0xa0/0xa0 [ 614.272710] [] ? kthread_park+0xa0/0xa0 [ 614.278315] [] ? kthread_park+0xa0/0xa0 [ 614.283921] [] ret_from_fork+0x5c/0x70 [ 614.290075] Dumping ftrace buffer: [ 614.293678] (ftrace buffer empty) [ 614.297531] Kernel Offset: disabled [ 614.301147] Rebooting in 86400 seconds..