INIT: Id "4" 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 "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes [ 121.383737] random: crng init done Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts. executing program 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 "4" 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 [ 613.530365] INFO: task syz-executor711:3874 blocked for more than 120 seconds. [ 613.537822] Not tainted 4.9.108-gb7d377b #50 [ 613.542760] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.551457] syz-executor711 D27176 3874 3872 0x00000000 [ 613.557232] ffff8801d7531800 0000000000000000 ffff8801b5412f40 ffffffff84629800 [ 613.565265] ffff8801db221c18 ffff8801b552f9f0 ffffffff839e8aed 0000000000000002 [ 613.573297] 0000000041b58ab3 ffffffff843b9ed3 00ffffff81221500 ffff8801db2224e8 [ 613.581323] Call Trace: [ 613.583970] [] ? __schedule+0x64d/0x1bd0 [ 613.589666] [] schedule+0x7f/0x1b0 [ 613.594903] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.601573] [] ? plug_ctx_cmp+0x100/0x100 [ 613.607381] [] ? prepare_to_wait_event+0x450/0x450 [ 613.613970] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.620027] [] lo_ioctl+0x722/0x1aa0 [ 613.625460] [] ? save_stack+0xa9/0xd0 [ 613.630991] [] ? loop_lookup.part.19+0x110/0x110 [ 613.637372] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.643161] [] ? blkpg_ioctl+0x920/0x920 [ 613.648848] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 613.655770] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 613.662634] [] block_ioctl+0xde/0x120 [ 613.668058] [] ? blkdev_fallocate+0x440/0x440 [ 613.674208] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.679892] [] ? ioctl_preallocate+0x220/0x220 [ 613.686488] [] ? kmem_cache_free+0x294/0x310 [ 613.692568] [] ? selinux_capable+0x40/0x40 [ 613.698460] [] ? do_sys_open+0x224/0x5c0 [ 613.704174] [] ? filp_open+0x70/0x70 [ 613.709526] [] ? security_file_ioctl+0x8f/0xc0 [ 613.715754] [] SyS_ioctl+0x8f/0xc0 [ 613.720927] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.726871] [] do_syscall_64+0x1a6/0x490 [ 613.732613] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.739521] [ 613.739521] Showing all locks held in the system: [ 613.745841] 2 locks held by khungtaskd/519: [ 613.750133] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.758893] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.768602] 1 lock held by rsyslogd/3684: [ 613.772744] #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 [ 613.781672] 2 locks held by getty/3780: [ 613.785618] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.794962] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.804898] 1 lock held by syz-executor711/3874: [ 613.809623] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 613.818998] [ 613.820618] ============================================= [ 613.820618] [ 613.827936] NMI backtrace for cpu 1 [ 613.831559] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.108-gb7d377b #50 [ 613.838803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 613.848143] ffff8801d8597d08 ffffffff81eb3e29 0000000000000000 0000000000000001 [ 613.856143] 0000000000000001 0000000000000001 ffffffff810b96a0 ffff8801d8597d40 [ 613.864120] ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003 [ 613.872102] Call Trace: [ 613.874691] [] dump_stack+0xc1/0x128 [ 613.880069] [] ? irq_force_complete_move+0x320/0x320 [ 613.886799] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 613.893264] [] ? irq_force_complete_move+0x320/0x320 [ 613.899989] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 613.907072] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 613.914058] [] watchdog+0x6b4/0xa20 [ 613.919327] [] ? watchdog+0x11c/0xa20 [ 613.924801] [] kthread+0x26d/0x300 [ 613.929965] [] ? reset_hung_task_detector+0x20/0x20 [ 613.936603] [] ? kthread_park+0xa0/0xa0 [ 613.942198] [] ? kthread_park+0xa0/0xa0 [ 613.947806] [] ? kthread_park+0xa0/0xa0 [ 613.953413] [] ret_from_fork+0x5c/0x70 [ 613.959058] Sending NMI from CPU 1 to CPUs 0: [ 613.963598] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f85f6 [ 613.971158] Kernel panic - not syncing: hung_task: blocked tasks [ 613.977284] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.108-gb7d377b #50 [ 613.984525] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 613.993854] ffff8801d8597cc8 ffffffff81eb3e29 ffffffff83c8bdc0 00000000ffffffff [ 614.001830] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d8597d88 [ 614.009801] ffffffff81421925 0000000041b58ab3 ffffffff843b9b78 ffffffff81421766 [ 614.017778] Call Trace: [ 614.020344] [] dump_stack+0xc1/0x128 [ 614.025679] [] panic+0x1bf/0x3bc [ 614.030668] [] ? add_taint.cold.6+0x16/0x16 [ 614.036609] [] ? ___preempt_schedule+0x16/0x18 [ 614.042813] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.050071] [] watchdog+0x6c5/0xa20 [ 614.055317] [] ? watchdog+0x11c/0xa20 [ 614.060735] [] kthread+0x26d/0x300 [ 614.065897] [] ? reset_hung_task_detector+0x20/0x20 [ 614.072531] [] ? kthread_park+0xa0/0xa0 [ 614.078125] [] ? kthread_park+0xa0/0xa0 [ 614.083720] [] ? kthread_park+0xa0/0xa0 [ 614.089316] [] ret_from_fork+0x5c/0x70 [ 614.095298] Dumping ftrace buffer: [ 614.098831] (ftrace buffer empty) [ 614.102513] Kernel Offset: disabled [ 614.106115] Rebooting in 86400 seconds..