INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "5" 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 [ 137.549028] random: crng init done Warning: Permanently added '10.128.10.31' (ECDSA) to the list of known hosts. executing program executing program executing program INIT: Id "1" 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 "5" 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 [ 613.708746] INFO: task syz-executor143:3850 blocked for more than 120 seconds. [ 613.716155] Not tainted 4.9.109-ga4230be #51 [ 613.721122] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.729325] syz-executor143 D27176 3850 3848 0x00000000 [ 613.735146] ffff8801b5b88000 ffff8801d6decfc0 ffff8801d874b9c0 ffff8801d814c800 [ 613.743255] ffff8801db321c18 ffff8801beff79f0 ffffffff839e8a8d 0000000000000002 [ 613.751329] 0000000041b58ab3 ffffffff843b9d9b 00ffffff81221500 ffff8801db3224e8 [ 613.759430] Call Trace: [ 613.762051] [] ? __schedule+0x64d/0x1bd0 [ 613.767740] [] schedule+0x7f/0x1b0 [ 613.772972] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.779651] [] ? plug_ctx_cmp+0x100/0x100 [ 613.785454] [] ? prepare_to_wait_event+0x450/0x450 [ 613.792037] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.798096] [] lo_ioctl+0x722/0x1aa0 [ 613.803606] [] ? loop_lookup.part.19+0x110/0x110 [ 613.810000] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.815685] [] ? blkpg_ioctl+0x920/0x920 [ 613.821449] [] ? do_readv_writev+0x1fe/0x7a0 [ 613.827490] [] ? vfs_write+0x530/0x530 [ 613.833408] [] block_ioctl+0xde/0x120 [ 613.838923] [] ? blkdev_fallocate+0x440/0x440 [ 613.845063] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.850783] [] ? ioctl_preallocate+0x220/0x220 [ 613.856992] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 613.863987] [] ? selinux_capable+0x40/0x40 [ 613.869877] [] ? vfs_writev+0x8f/0xc0 [ 613.875306] [] ? do_pwritev+0x13e/0x240 [ 613.880999] [] ? security_file_ioctl+0x8f/0xc0 [ 613.887504] [] SyS_ioctl+0x8f/0xc0 [ 613.892708] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.898687] [] do_syscall_64+0x1a6/0x490 [ 613.904396] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.911351] [ 613.911351] Showing all locks held in the system: [ 613.917658] 2 locks held by khungtaskd/519: [ 613.921996] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.930867] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.940619] 2 locks held by getty/3773: [ 613.944569] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.953933] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.963959] 1 lock held by syz-executor143/3850: [ 613.968765] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 613.978098] [ 613.979739] ============================================= [ 613.979739] [ 613.987097] NMI backtrace for cpu 0 [ 613.990736] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ga4230be #51 [ 613.997995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.007334] ffff8801d97bfd08 ffffffff81eb3e29 0000000000000000 0000000000000000 [ 614.015332] 0000000000000000 0000000000000001 ffffffff810b9580 ffff8801d97bfd40 [ 614.023348] ffffffff81ebf127 0000000000000000 0000000000000000 0000000000000003 [ 614.031347] Call Trace: [ 614.033943] [] dump_stack+0xc1/0x128 [ 614.039606] [] ? irq_force_complete_move+0x320/0x320 [ 614.046352] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.053607] [] ? irq_force_complete_move+0x320/0x320 [ 614.060380] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.067459] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.074467] [] watchdog+0x6b4/0xa20 [ 614.079747] [] ? watchdog+0x11c/0xa20 [ 614.085238] [] kthread+0x26d/0x300 [ 614.090405] [] ? reset_hung_task_detector+0x20/0x20 [ 614.097042] [] ? kthread_park+0xa0/0xa0 [ 614.102637] [] ? kthread_park+0xa0/0xa0 [ 614.108240] [] ? kthread_park+0xa0/0xa0 [ 614.113837] [] ret_from_fork+0x5c/0x70 [ 614.119442] Sending NMI from CPU 0 to CPUs 1: [ 614.123963] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff839f8596 [ 614.131553] Kernel panic - not syncing: hung_task: blocked tasks [ 614.137691] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ga4230be #51 [ 614.144947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.154286] ffff8801d97bfcc8 ffffffff81eb3e29 ffffffff83c8bbe0 00000000ffffffff [ 614.162311] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d97bfd88 [ 614.170330] ffffffff81421925 0000000041b58ab3 ffffffff843b9a40 ffffffff81421766 [ 614.178685] Call Trace: [ 614.181252] [] dump_stack+0xc1/0x128 [ 614.186592] [] panic+0x1bf/0x3bc [ 614.191582] [] ? add_taint.cold.6+0x16/0x16 [ 614.197524] [] ? ___preempt_schedule+0x16/0x18 [ 614.204362] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.211609] [] watchdog+0x6c5/0xa20 [ 614.216864] [] ? watchdog+0x11c/0xa20 [ 614.222288] [] kthread+0x26d/0x300 [ 614.227449] [] ? reset_hung_task_detector+0x20/0x20 [ 614.234087] [] ? kthread_park+0xa0/0xa0 [ 614.239683] [] ? kthread_park+0xa0/0xa0 [ 614.245460] [] ? kthread_park+0xa0/0xa0 [ 614.251058] [] ret_from_fork+0x5c/0x70 [ 614.257161] Dumping ftrace buffer: [ 614.260740] (ftrace buffer empty) [ 614.264426] Kernel Offset: disabled [ 614.268035] Rebooting in 86400 seconds..