INIT: Id "6" 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 INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. executing program executing program executing program [ 715.992641] INFO: task syz-executor625:3911 blocked for more than 140 seconds. [ 716.000162] Not tainted 4.9.112-g9e79039 #59 [ 716.005636] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.013789] syz-executor625 D26504 3911 3909 0x00000000 [ 716.019526] ffff8801d953b000 ffff8801d783a4c0 ffff8801da311500 ffff8801d940b000 [ 716.027770] ffff8801db321c18 ffff8801cb3b79f0 ffffffff839e907d 0000000000000002 [ 716.035919] 0000000041b58ab3 ffffffff843bb1d3 00ffffff81221570 ffff8801db3224e8 [ 716.043958] Call Trace: [ 716.046545] [] ? __schedule+0x64d/0x1bd0 [ 716.052232] [] schedule+0x7f/0x1b0 [ 716.057446] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 716.064107] [] ? plug_ctx_cmp+0x100/0x100 [ 716.069885] [] ? prepare_to_wait_event+0x450/0x450 [ 716.076488] [] blk_mq_freeze_queue+0x1d/0x20 [ 716.082553] [] lo_ioctl+0x722/0x1aa0 [ 716.087892] [] ? save_stack+0xa9/0xd0 [ 716.093344] [] ? loop_lookup.part.19+0x110/0x110 [ 716.099725] [] blkdev_ioctl+0x7b6/0x1a70 [ 716.105439] [] ? blkpg_ioctl+0x920/0x920 [ 716.111130] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 716.118156] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 716.125011] [] block_ioctl+0xde/0x120 [ 716.130438] [] ? blkdev_fallocate+0x440/0x440 [ 716.136582] [] do_vfs_ioctl+0x1ac/0x11a0 [ 716.142268] [] ? ioctl_preallocate+0x220/0x220 [ 716.148506] [] ? kmem_cache_free+0x294/0x310 [ 716.154556] [] ? selinux_capable+0x40/0x40 [ 716.160418] [] ? do_sys_open+0x224/0x5c0 [ 716.166218] [] ? filp_open+0x70/0x70 [ 716.171560] [] ? security_file_ioctl+0x8f/0xc0 [ 716.177796] [] SyS_ioctl+0x8f/0xc0 [ 716.182978] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 716.188929] [] do_syscall_64+0x1a6/0x490 [ 716.194646] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 716.201549] [ 716.201549] Showing all locks held in the system: [ 716.207880] 2 locks held by khungtaskd/519: [ 716.212186] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 716.220942] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 716.230653] 1 lock held by rsyslogd/3678: [ 716.234802] #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 [ 716.243820] 2 locks held by getty/3774: [ 716.247766] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 716.257124] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 716.267141] 1 lock held by syz-executor625/3911: [ 716.271883] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 716.281261] [ 716.282883] ============================================= [ 716.282883] [ 716.290048] NMI backtrace for cpu 0 [ 716.293745] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #59 [ 716.301006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.310372] ffff8801d84c7d08 ffffffff81eb3249 0000000000000000 0000000000000000 [ 716.318523] 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d84c7d40 [ 716.326624] ffffffff81ebe547 0000000000000000 0000000000000000 0000000000000003 [ 716.334645] Call Trace: [ 716.337214] [] dump_stack+0xc1/0x128 [ 716.342557] [] ? irq_force_complete_move+0x320/0x320 [ 716.349284] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 716.355751] [] ? irq_force_complete_move+0x320/0x320 [ 716.362487] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 716.369561] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 716.376549] [] watchdog+0x6b4/0xa20 [ 716.382359] [] ? watchdog+0x11c/0xa20 [ 716.387785] [] kthread+0x26d/0x300 [ 716.392953] [] ? reset_hung_task_detector+0x20/0x20 [ 716.399593] [] ? kthread_park+0xa0/0xa0 [ 716.405199] [] ? kthread_park+0xa0/0xa0 [ 716.410806] [] ? kthread_park+0xa0/0xa0 [ 716.416405] [] ret_from_fork+0x5c/0x70 [ 716.422037] Sending NMI from CPU 0 to CPUs 1: [ 716.426584] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff839f8b86 [ 716.434139] Kernel panic - not syncing: hung_task: blocked tasks [ 716.440272] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #59 [ 716.447518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.456847] ffff8801d84c7cc8 ffffffff81eb3249 ffffffff83c8bc20 00000000ffffffff [ 716.464874] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d84c7d88 [ 716.472960] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 716.480964] Call Trace: [ 716.483531] [] dump_stack+0xc1/0x128 [ 716.488872] [] panic+0x1bf/0x3bc [ 716.493864] [] ? add_taint.cold.6+0x16/0x16 [ 716.499809] [] ? ___preempt_schedule+0x16/0x18 [ 716.506025] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 716.513285] [] watchdog+0x6c5/0xa20 [ 716.518536] [] ? watchdog+0x11c/0xa20 [ 716.523962] [] kthread+0x26d/0x300 [ 716.529138] [] ? reset_hung_task_detector+0x20/0x20 [ 716.535777] [] ? kthread_park+0xa0/0xa0 [ 716.541376] [] ? kthread_park+0xa0/0xa0 [ 716.546974] [] ? kthread_park+0xa0/0xa0 [ 716.552572] [] ret_from_fork+0x5c/0x70 [ 716.558638] Dumping ftrace buffer: [ 716.562214] (ftrace buffer empty) [ 716.565978] Kernel Offset: disabled [ 716.569589] Rebooting in 86400 seconds..