INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes [ 446.696596] random: sshd: uninitialized urandom read (32 bytes read) [ 446.811794] random: crng init done Warning: Permanently added '10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "4" 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 [ 613.769359] INFO: task syz-executor186:3878 blocked for more than 120 seconds. [ 613.776775] Not tainted 4.9.102-gc5aceac #35 [ 613.781944] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.790095] syz-executor186 D27176 3878 3876 0x00000000 [ 613.795906] ffff8801b5568000 0000000000000000 ffff8801d9191a40 ffffffff84629800 [ 613.804043] ffff8801db221c18 ffff8801b55579f0 ffffffff839e69ed 0000000000000002 [ 613.812137] 0000000041b58ab3 ffffffff843b980b 00ffffff81221330 ffff8801db2224e8 [ 613.820192] Call Trace: [ 613.822942] [] ? __schedule+0x64d/0x1bd0 [ 613.828663] [] schedule+0x7f/0x1b0 [ 613.834029] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.841708] [] ? plug_ctx_cmp+0x100/0x100 [ 613.847579] [] ? prepare_to_wait_event+0x450/0x450 [ 613.854313] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.860568] [] lo_ioctl+0x722/0x1aa0 [ 613.865927] [] ? loop_lookup.part.19+0x110/0x110 [ 613.872400] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.878108] [] ? blkpg_ioctl+0x920/0x920 [ 613.884124] [] ? do_readv_writev+0x1fe/0x7a0 [ 613.890569] [] ? vfs_write+0x530/0x530 [ 613.896175] [] block_ioctl+0xde/0x120 [ 613.901670] [] ? blkdev_fallocate+0x440/0x440 [ 613.907845] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.913578] [] ? ioctl_preallocate+0x220/0x220 [ 613.919926] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 613.926930] [] ? selinux_capable+0x40/0x40 [ 613.932881] [] ? vfs_writev+0x8f/0xc0 [ 613.938345] [] ? do_pwritev+0x13e/0x240 [ 613.944081] [] ? security_file_ioctl+0x8f/0xc0 [ 613.950420] [] SyS_ioctl+0x8f/0xc0 [ 613.955637] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.961707] [] do_syscall_64+0x1a6/0x490 [ 613.967433] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.974420] [ 613.974420] Showing all locks held in the system: [ 613.980796] 2 locks held by khungtaskd/519: [ 613.985115] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.994044] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 614.003917] 2 locks held by getty/3778: [ 614.007902] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 614.017373] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 614.027462] 1 lock held by syz-executor186/3878: [ 614.032246] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 614.041613] [ 614.043215] ============================================= [ 614.043215] [ 614.050619] NMI backtrace for cpu 1 [ 614.054285] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.102-gc5aceac #35 [ 614.061534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.070868] ffff8801d854fd08 ffffffff81eb3489 0000000000000000 0000000000000001 [ 614.078850] 0000000000000001 0000000000000001 ffffffff810b9590 ffff8801d854fd40 [ 614.086846] ffffffff81ebe787 0000000000000001 0000000000000000 0000000000000003 [ 614.094871] Call Trace: [ 614.097503] [] dump_stack+0xc1/0x128 [ 614.102886] [] ? irq_force_complete_move+0x320/0x320 [ 614.109633] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.116109] [] ? irq_force_complete_move+0x320/0x320 [ 614.122848] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.129933] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.137618] [] watchdog+0x6b4/0xa20 [ 614.142868] [] ? watchdog+0x11c/0xa20 [ 614.148339] [] kthread+0x26d/0x300 [ 614.153506] [] ? reset_hung_task_detector+0x20/0x20 [ 614.160156] [] ? kthread_park+0xa0/0xa0 [ 614.165851] [] ? kthread_park+0xa0/0xa0 [ 614.171461] [] ? kthread_park+0xa0/0xa0 [ 614.177069] [] ret_from_fork+0x5c/0x70 [ 614.182703] Sending NMI from CPU 1 to CPUs 0: [ 614.187220] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f64f6 [ 614.194561] Kernel panic - not syncing: hung_task: blocked tasks [ 614.200704] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.102-gc5aceac #35 [ 614.207948] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.217286] ffff8801d854fcc8 ffffffff81eb3489 ffffffff83c8bb80 00000000ffffffff [ 614.225337] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d854fd88 [ 614.233328] ffffffff81421aa5 0000000041b58ab3 ffffffff843b94b0 ffffffff814218e6 [ 614.241326] Call Trace: [ 614.243895] [] dump_stack+0xc1/0x128 [ 614.249259] [] panic+0x1bf/0x3bc [ 614.254250] [] ? add_taint.cold.6+0x16/0x16 [ 614.260195] [] ? ___preempt_schedule+0x16/0x18 [ 614.266400] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.273655] [] watchdog+0x6c5/0xa20 [ 614.278905] [] ? watchdog+0x11c/0xa20 [ 614.284336] [] kthread+0x26d/0x300 [ 614.289500] [] ? reset_hung_task_detector+0x20/0x20 [ 614.296138] [] ? kthread_park+0xa0/0xa0 [ 614.301743] [] ? kthread_park+0xa0/0xa0 [ 614.307515] [] ? kthread_park+0xa0/0xa0 [ 614.313115] [] ret_from_fork+0x5c/0x70 [ 614.319186] Dumping ftrace buffer: [ 614.322764] (ftrace buffer empty) [ 614.326448] Kernel Offset: disabled [ 614.330068] Rebooting in 86400 seconds..