INIT: Id "1" 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 INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes [ 119.649213] random: crng init done Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. executing program executing program INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "1" 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 "4" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes [ 613.713058] INFO: task syz-executor733:3881 blocked for more than 120 seconds. [ 613.720485] Not tainted 4.9.109-ga4230be #48 [ 613.725611] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.734156] syz-executor733 D27176 3881 3879 0x00000000 [ 613.740018] ffff8801d862b000 0000000000000000 ffff8801d98dda40 ffff8801d9a6b000 [ 613.748223] ffff8801db321c18 ffff8801bb0ef9f0 ffffffff839e8a8d 0000000000000002 [ 613.756372] 0000000041b58ab3 ffffffff843b9d9b 00ffffff81221500 ffff8801db3224e8 [ 613.764741] Call Trace: [ 613.767366] [] ? __schedule+0x64d/0x1bd0 [ 613.773436] [] schedule+0x7f/0x1b0 [ 613.778648] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.785335] [] ? plug_ctx_cmp+0x100/0x100 [ 613.791570] [] ? prepare_to_wait_event+0x450/0x450 [ 613.798162] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.804242] [] lo_ioctl+0x722/0x1aa0 [ 613.809592] [] ? loop_lookup.part.19+0x110/0x110 [ 613.816002] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.821700] [] ? blkpg_ioctl+0x920/0x920 [ 613.827484] [] ? do_readv_writev+0x1fe/0x7a0 [ 613.833659] [] ? vfs_write+0x530/0x530 [ 613.839245] [] block_ioctl+0xde/0x120 [ 613.844743] [] ? blkdev_fallocate+0x440/0x440 [ 613.850889] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.856614] [] ? ioctl_preallocate+0x220/0x220 [ 613.863381] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 613.870324] [] ? selinux_capable+0x40/0x40 [ 613.876233] [] ? vfs_writev+0x8f/0xc0 [ 613.881663] [] ? do_pwritev+0x13e/0x240 [ 613.887341] [] ? security_file_ioctl+0x8f/0xc0 [ 613.893608] [] SyS_ioctl+0x8f/0xc0 [ 613.898797] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.905129] [] do_syscall_64+0x1a6/0x490 [ 613.910822] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.917776] [ 613.917776] Showing all locks held in the system: [ 613.924540] 2 locks held by khungtaskd/519: [ 613.928833] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.937657] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.947389] 2 locks held by getty/3774: [ 613.951352] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.960735] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.970774] 1 lock held by syz-executor733/3881: [ 613.975582] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 613.985033] [ 613.986654] ============================================= [ 613.986654] [ 613.993833] NMI backtrace for cpu 0 [ 613.997457] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ga4230be #48 [ 614.004735] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.014185] ffff8801d8fefd08 ffffffff81eb3e29 0000000000000000 0000000000000000 [ 614.022191] 0000000000000000 0000000000000001 ffffffff810b9580 ffff8801d8fefd40 [ 614.030176] ffffffff81ebf127 0000000000000000 0000000000000000 0000000000000003 [ 614.038165] Call Trace: [ 614.040757] [] dump_stack+0xc1/0x128 [ 614.046138] [] ? irq_force_complete_move+0x320/0x320 [ 614.052874] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.059348] [] ? irq_force_complete_move+0x320/0x320 [ 614.066073] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.073155] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.080230] [] watchdog+0x6b4/0xa20 [ 614.085490] [] ? watchdog+0x11c/0xa20 [ 614.090945] [] kthread+0x26d/0x300 [ 614.096210] [] ? reset_hung_task_detector+0x20/0x20 [ 614.102854] [] ? kthread_park+0xa0/0xa0 [ 614.108468] [] ? kthread_park+0xa0/0xa0 [ 614.114071] [] ? kthread_park+0xa0/0xa0 [ 614.119677] [] ret_from_fork+0x5c/0x70 [ 614.125293] Sending NMI from CPU 0 to CPUs 1: [ 614.129818] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff839f8596 [ 614.137422] Kernel panic - not syncing: hung_task: blocked tasks [ 614.143562] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ga4230be #48 [ 614.150820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.160590] ffff8801d8fefcc8 ffffffff81eb3e29 ffffffff83c8bbe0 00000000ffffffff [ 614.168578] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d8fefd88 [ 614.176746] ffffffff81421925 0000000041b58ab3 ffffffff843b9a40 ffffffff81421766 [ 614.184742] Call Trace: [ 614.187315] [] dump_stack+0xc1/0x128 [ 614.192650] [] panic+0x1bf/0x3bc [ 614.197638] [] ? add_taint.cold.6+0x16/0x16 [ 614.203593] [] ? ___preempt_schedule+0x16/0x18 [ 614.209802] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.217056] [] watchdog+0x6c5/0xa20 [ 614.222317] [] ? watchdog+0x11c/0xa20 [ 614.227743] [] kthread+0x26d/0x300 [ 614.232903] [] ? reset_hung_task_detector+0x20/0x20 [ 614.239540] [] ? kthread_park+0xa0/0xa0 [ 614.245146] [] ? kthread_park+0xa0/0xa0 [ 614.250751] [] ? kthread_park+0xa0/0xa0 [ 614.256349] [] ret_from_fork+0x5c/0x70 [ 614.262527] Dumping ftrace buffer: [ 614.266110] (ftrace buffer empty) [ 614.269801] Kernel Offset: disabled [ 614.273421] Rebooting in 86400 seconds..