INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "4" 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 Warning: Permanently added '10.128.0.33' (ECDSA) to the list of known hosts. executing program executing program INIT: Id "5" 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 "6" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes [ 613.906448] INFO: task syz-executor769:3856 blocked for more than 120 seconds. [ 613.913965] Not tainted 4.9.109-ge1815b3 #49 [ 613.919090] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.927304] syz-executor769 D27176 3856 3854 0x00000000 [ 613.933111] ffff8801d95a6000 0000000000000000 ffff8801c9280fc0 ffffffff84629800 [ 613.941321] ffff8801db221c18 ffff8801c2b7f9f0 ffffffff839e8a8d 0000000000000002 [ 613.949399] 0000000041b58ab3 ffffffff843b9d9b 00ffffff81221500 ffff8801db2224e8 [ 613.957523] Call Trace: [ 613.960182] [] ? __schedule+0x64d/0x1bd0 [ 613.965881] [] schedule+0x7f/0x1b0 [ 613.971234] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.978322] [] ? plug_ctx_cmp+0x100/0x100 [ 613.984176] [] ? prepare_to_wait_event+0x450/0x450 [ 613.990808] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.996946] [] lo_ioctl+0x722/0x1aa0 [ 614.002294] [] ? loop_lookup.part.19+0x110/0x110 [ 614.008850] [] blkdev_ioctl+0x7b6/0x1a70 [ 614.014553] [] ? blkpg_ioctl+0x920/0x920 [ 614.020353] [] ? do_readv_writev+0x1fe/0x7a0 [ 614.026452] [] ? vfs_write+0x530/0x530 [ 614.032019] [] block_ioctl+0xde/0x120 [ 614.037572] [] ? blkdev_fallocate+0x440/0x440 [ 614.043745] [] do_vfs_ioctl+0x1ac/0x11a0 [ 614.049551] [] ? ioctl_preallocate+0x220/0x220 [ 614.055790] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 614.062849] [] ? selinux_capable+0x40/0x40 [ 614.068773] [] ? vfs_writev+0x8f/0xc0 [ 614.074208] [] ? do_pwritev+0x13e/0x240 [ 614.079952] [] ? security_file_ioctl+0x8f/0xc0 [ 614.086183] [] SyS_ioctl+0x8f/0xc0 [ 614.092009] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 614.098026] [] do_syscall_64+0x1a6/0x490 [ 614.103741] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 614.111197] [ 614.111197] Showing all locks held in the system: [ 614.117568] 2 locks held by khungtaskd/519: [ 614.122038] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 614.130880] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 614.140648] 2 locks held by getty/3774: [ 614.144593] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 614.154122] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 614.164139] 1 lock held by syz-executor769/3856: [ 614.168910] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 614.178526] [ 614.180126] ============================================= [ 614.180126] [ 614.187203] NMI backtrace for cpu 1 [ 614.190821] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ge1815b3 #49 [ 614.198062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.207394] ffff8801d8acfd08 ffffffff81eb3e29 0000000000000000 0000000000000001 [ 614.215422] 0000000000000001 0000000000000001 ffffffff810b9580 ffff8801d8acfd40 [ 614.223410] ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003 [ 614.231396] Call Trace: [ 614.234018] [] dump_stack+0xc1/0x128 [ 614.239412] [] ? irq_force_complete_move+0x320/0x320 [ 614.246158] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.252655] [] ? irq_force_complete_move+0x320/0x320 [ 614.259390] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.266464] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.273460] [] watchdog+0x6b4/0xa20 [ 614.278715] [] ? watchdog+0x11c/0xa20 [ 614.284229] [] kthread+0x26d/0x300 [ 614.289396] [] ? reset_hung_task_detector+0x20/0x20 [ 614.296057] [] ? kthread_park+0xa0/0xa0 [ 614.301657] [] ? kthread_park+0xa0/0xa0 [ 614.307253] [] ? kthread_park+0xa0/0xa0 [ 614.312859] [] ret_from_fork+0x5c/0x70 [ 614.318515] Sending NMI from CPU 1 to CPUs 0: [ 614.323036] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f8596 [ 614.330714] Kernel panic - not syncing: hung_task: blocked tasks [ 614.336855] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ge1815b3 #49 [ 614.344098] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.353623] ffff8801d8acfcc8 ffffffff81eb3e29 ffffffff83c8bbe0 00000000ffffffff [ 614.361620] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d8acfd88 [ 614.369621] ffffffff81421925 0000000041b58ab3 ffffffff843b9a40 ffffffff81421766 [ 614.377615] Call Trace: [ 614.380193] [] dump_stack+0xc1/0x128 [ 614.385560] [] panic+0x1bf/0x3bc [ 614.390569] [] ? add_taint.cold.6+0x16/0x16 [ 614.396537] [] ? ___preempt_schedule+0x16/0x18 [ 614.402919] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.410184] [] watchdog+0x6c5/0xa20 [ 614.415440] [] ? watchdog+0x11c/0xa20 [ 614.420884] [] kthread+0x26d/0x300 [ 614.426067] [] ? reset_hung_task_detector+0x20/0x20 [ 614.432711] [] ? kthread_park+0xa0/0xa0 [ 614.438327] [] ? kthread_park+0xa0/0xa0 [ 614.443925] [] ? kthread_park+0xa0/0xa0 [ 614.449536] [] ret_from_fork+0x5c/0x70 [ 614.455783] Dumping ftrace buffer: [ 614.459342] (ftrace buffer empty) [ 614.463030] Kernel Offset: disabled [ 614.466639] Rebooting in 86400 seconds..