INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.35' (ECDSA) to the list of known hosts. executing program executing program executing program INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "6" 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 "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes [ 613.699974] INFO: task syz-executor170:3881 blocked for more than 120 seconds. [ 613.707378] Not tainted 4.9.108-gb7d377b #47 [ 613.712384] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.720359] syz-executor170 D27176 3881 3879 0x00000000 [ 613.726111] ffff8801d5278000 ffff8801d6f2ef40 ffff8801d6f85f80 ffff8801d73e1800 [ 613.734177] ffff8801db221c18 ffff8801d4c479f0 ffffffff839e8aed 0000000000000002 [ 613.742240] 0000000041b58ab3 ffffffff843b9ed3 00ffffff81221500 ffff8801db2224e8 [ 613.750288] Call Trace: [ 613.752865] [] ? __schedule+0x64d/0x1bd0 [ 613.758555] [] schedule+0x7f/0x1b0 [ 613.763769] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.770434] [] ? plug_ctx_cmp+0x100/0x100 [ 613.776225] [] ? prepare_to_wait_event+0x450/0x450 [ 613.782833] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.788869] [] lo_ioctl+0x722/0x1aa0 [ 613.794253] [] ? save_stack+0xa9/0xd0 [ 613.799698] [] ? loop_lookup.part.19+0x110/0x110 [ 613.806126] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.811835] [] ? blkpg_ioctl+0x920/0x920 [ 613.817698] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 613.824654] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 613.831514] [] block_ioctl+0xde/0x120 [ 613.836958] [] ? blkdev_fallocate+0x440/0x440 [ 613.843127] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.848830] [] ? ioctl_preallocate+0x220/0x220 [ 613.855111] [] ? kmem_cache_free+0x294/0x310 [ 613.861184] [] ? selinux_capable+0x40/0x40 [ 613.867053] [] ? do_sys_open+0x224/0x5c0 [ 613.872789] [] ? filp_open+0x70/0x70 [ 613.878130] [] ? do_pwritev+0x13e/0x240 [ 613.883772] [] ? security_file_ioctl+0x8f/0xc0 [ 613.890002] [] SyS_ioctl+0x8f/0xc0 [ 613.895168] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.901155] [] do_syscall_64+0x1a6/0x490 [ 613.906844] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.913781] [ 613.913781] Showing all locks held in the system: [ 613.920092] 2 locks held by khungtaskd/519: [ 613.924400] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.933127] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.942824] 1 lock held by rsyslogd/3681: [ 613.946944] #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 [ 613.955873] 2 locks held by getty/3777: [ 613.959866] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.969182] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.979158] 1 lock held by syz-executor170/3881: [ 613.983922] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 613.993301] [ 613.994928] ============================================= [ 613.994928] [ 614.002015] NMI backtrace for cpu 1 [ 614.005624] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.108-gb7d377b #47 [ 614.012890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.022311] ffff8801d85b7d08 ffffffff81eb3e29 0000000000000000 0000000000000001 [ 614.030296] 0000000000000001 0000000000000001 ffffffff810b96a0 ffff8801d85b7d40 [ 614.038286] ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003 [ 614.046294] Call Trace: [ 614.048870] [] dump_stack+0xc1/0x128 [ 614.054302] [] ? irq_force_complete_move+0x320/0x320 [ 614.061028] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.067499] [] ? irq_force_complete_move+0x320/0x320 [ 614.074223] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.081305] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.088307] [] watchdog+0x6b4/0xa20 [ 614.093561] [] ? watchdog+0x11c/0xa20 [ 614.098993] [] kthread+0x26d/0x300 [ 614.104155] [] ? reset_hung_task_detector+0x20/0x20 [ 614.110792] [] ? kthread_park+0xa0/0xa0 [ 614.116387] [] ? kthread_park+0xa0/0xa0 [ 614.121980] [] ? kthread_park+0xa0/0xa0 [ 614.127579] [] ret_from_fork+0x5c/0x70 [ 614.133198] Sending NMI from CPU 1 to CPUs 0: [ 614.137716] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f85f6 [ 614.144999] Kernel panic - not syncing: hung_task: blocked tasks [ 614.151135] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.108-gb7d377b #47 [ 614.158384] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.167807] ffff8801d85b7cc8 ffffffff81eb3e29 ffffffff83c8bdc0 00000000ffffffff [ 614.175813] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d85b7d88 [ 614.183791] ffffffff81421925 0000000041b58ab3 ffffffff843b9b78 ffffffff81421766 [ 614.191777] Call Trace: [ 614.194341] [] dump_stack+0xc1/0x128 [ 614.199676] [] panic+0x1bf/0x3bc [ 614.204661] [] ? add_taint.cold.6+0x16/0x16 [ 614.210603] [] ? ___preempt_schedule+0x16/0x18 [ 614.216811] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.224069] [] watchdog+0x6c5/0xa20 [ 614.229319] [] ? watchdog+0x11c/0xa20 [ 614.234743] [] kthread+0x26d/0x300 [ 614.239917] [] ? reset_hung_task_detector+0x20/0x20 [ 614.246555] [] ? kthread_park+0xa0/0xa0 [ 614.252151] [] ? kthread_park+0xa0/0xa0 [ 614.257750] [] ? kthread_park+0xa0/0xa0 [ 614.263349] [] ret_from_fork+0x5c/0x70 [ 614.269427] Dumping ftrace buffer: [ 614.272990] (ftrace buffer empty) [ 614.276672] Kernel Offset: disabled [ 614.280281] Rebooting in 86400 seconds..