INIT: Id "5" 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 "1" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. executing program executing program executing program [ 716.060599] INFO: task syz-executor178:3896 blocked for more than 140 seconds. [ 716.068006] Not tainted 4.9.111-g03c70fe #58 [ 716.073412] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.081452] syz-executor178 D27176 3896 3894 0x00000000 [ 716.087264] ffff8801d94d4800 ffff8801d6f739c0 ffff8801c227da40 ffff8801d94d1800 [ 716.095373] ffff8801db221c18 ffff8801b98df9f0 ffffffff839e7ded 0000000000000002 [ 716.103426] 0000000041b58ab3 ffffffff843bac1b 00ffffff81221510 ffff8801db2224e8 [ 716.111442] Call Trace: [ 716.114092] [] ? __schedule+0x64d/0x1bd0 [ 716.119786] [] schedule+0x7f/0x1b0 [ 716.125009] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 716.131670] [] ? plug_ctx_cmp+0x100/0x100 [ 716.137484] [] ? prepare_to_wait_event+0x450/0x450 [ 716.144056] [] blk_mq_freeze_queue+0x1d/0x20 [ 716.150124] [] lo_ioctl+0x722/0x1aa0 [ 716.155541] [] ? loop_lookup.part.19+0x110/0x110 [ 716.161947] [] blkdev_ioctl+0x7b6/0x1a70 [ 716.167630] [] ? blkpg_ioctl+0x920/0x920 [ 716.173415] [] ? do_readv_writev+0x1fe/0x7a0 [ 716.179457] [] ? vfs_write+0x530/0x530 [ 716.185013] [] block_ioctl+0xde/0x120 [ 716.190461] [] ? blkdev_fallocate+0x440/0x440 [ 716.196602] [] do_vfs_ioctl+0x1ac/0x11a0 [ 716.202647] [] ? ioctl_preallocate+0x220/0x220 [ 716.208858] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 716.215820] [] ? selinux_capable+0x40/0x40 [ 716.221761] [] ? vfs_writev+0x8f/0xc0 [ 716.227185] [] ? do_pwritev+0x13e/0x240 [ 716.232839] [] ? security_file_ioctl+0x8f/0xc0 [ 716.239046] [] SyS_ioctl+0x8f/0xc0 [ 716.244236] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 716.250182] [] do_syscall_64+0x1a6/0x490 [ 716.255910] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 716.262859] [ 716.262859] Showing all locks held in the system: [ 716.269158] 2 locks held by khungtaskd/519: [ 716.273466] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 716.282324] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 716.292247] 2 locks held by getty/3759: [ 716.296206] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 716.305956] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 716.316233] 1 lock held by syz-executor178/3896: [ 716.321029] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 716.330460] [ 716.332060] ============================================= [ 716.332060] [ 716.339383] NMI backtrace for cpu 0 [ 716.343032] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.111-g03c70fe #58 [ 716.350278] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.359621] ffff8801d85e7d08 ffffffff81eb2729 0000000000000000 0000000000000000 [ 716.367625] 0000000000000000 0000000000000001 ffffffff810b9af0 ffff8801d85e7d40 [ 716.375635] ffffffff81ebda27 0000000000000000 0000000000000000 0000000000000003 [ 716.383626] Call Trace: [ 716.386215] [] dump_stack+0xc1/0x128 [ 716.391584] [] ? irq_force_complete_move+0x320/0x320 [ 716.398308] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 716.404787] [] ? irq_force_complete_move+0x320/0x320 [ 716.411520] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 716.418590] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 716.425577] [] watchdog+0x6b4/0xa20 [ 716.430921] [] ? watchdog+0x11c/0xa20 [ 716.436383] [] kthread+0x26d/0x300 [ 716.441545] [] ? reset_hung_task_detector+0x20/0x20 [ 716.448194] [] ? kthread_park+0xa0/0xa0 [ 716.453790] [] ? kthread_park+0xa0/0xa0 [ 716.459393] [] ? kthread_park+0xa0/0xa0 [ 716.464990] [] ret_from_fork+0x5c/0x70 [ 716.470632] Sending NMI from CPU 0 to CPUs 1: [ 716.475145] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff839f78f6 [ 716.482754] Kernel panic - not syncing: hung_task: blocked tasks [ 716.488888] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.111-g03c70fe #58 [ 716.496141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.505483] ffff8801d85e7cc8 ffffffff81eb2729 ffffffff83c8bc20 00000000ffffffff [ 716.513486] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d85e7d88 [ 716.521477] ffffffff814219f5 0000000041b58ab3 ffffffff843ba8c0 ffffffff81421836 [ 716.529471] Call Trace: [ 716.532034] [] dump_stack+0xc1/0x128 [ 716.537373] [] panic+0x1bf/0x3bc [ 716.542364] [] ? add_taint.cold.6+0x16/0x16 [ 716.548308] [] ? ___preempt_schedule+0x16/0x18 [ 716.554513] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 716.561759] [] watchdog+0x6c5/0xa20 [ 716.567005] [] ? watchdog+0x11c/0xa20 [ 716.572428] [] kthread+0x26d/0x300 [ 716.577591] [] ? reset_hung_task_detector+0x20/0x20 [ 716.584239] [] ? kthread_park+0xa0/0xa0 [ 716.589836] [] ? kthread_park+0xa0/0xa0 [ 716.595430] [] ? kthread_park+0xa0/0xa0 [ 716.601039] [] ret_from_fork+0x5c/0x70 [ 716.607259] Dumping ftrace buffer: [ 716.610903] (ftrace buffer empty) [ 716.614588] Kernel Offset: disabled [ 716.618198] Rebooting in 86400 seconds..