INIT: Id "3" 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 "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes [ 442.490383] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts. [ 447.902193] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "3" 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 "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes [ 527.026340] random: crng init done [ 613.583777] INFO: task syz-executor076:3877 blocked for more than 120 seconds. [ 613.591184] Not tainted 4.9.102-gc5aceac #32 [ 613.596477] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.604550] syz-executor076 D28088 3877 3875 0x00000000 [ 613.610333] ffff8801b57e0000 0000000000000000 ffff8801d9316a00 ffffffff84629800 [ 613.618397] ffff8801db221c18 ffff8801b57c79f0 ffffffff839e69ed 0000000000000002 [ 613.626401] 0000000041b58ab3 ffffffff843b980b 00ffffff81221330 ffff8801db2224e8 [ 613.634399] Call Trace: [ 613.637033] [] ? __schedule+0x64d/0x1bd0 [ 613.642716] [] schedule+0x7f/0x1b0 [ 613.647958] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.654616] [] ? plug_ctx_cmp+0x100/0x100 [ 613.660420] [] ? prepare_to_wait_event+0x450/0x450 [ 613.667035] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.673103] [] lo_ioctl+0x722/0x1aa0 [ 613.678472] [] ? loop_lookup.part.19+0x110/0x110 [ 613.684878] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.690561] [] ? blkpg_ioctl+0x920/0x920 [ 613.696305] [] ? do_readv_writev+0x1fe/0x7a0 [ 613.702343] [] ? vfs_write+0x530/0x530 [ 613.707907] [] block_ioctl+0xde/0x120 [ 613.713339] [] ? blkdev_fallocate+0x440/0x440 [ 613.719512] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.725240] [] ? ioctl_preallocate+0x220/0x220 [ 613.731473] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 613.738418] [] ? selinux_capable+0x40/0x40 [ 613.744304] [] ? vfs_writev+0x8f/0xc0 [ 613.749731] [] ? do_pwritev+0x13e/0x240 [ 613.755379] [] ? security_file_ioctl+0x8f/0xc0 [ 613.761598] [] SyS_ioctl+0x8f/0xc0 [ 613.766800] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.772780] [] do_syscall_64+0x1a6/0x490 [ 613.778501] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.785425] [ 613.785425] Showing all locks held in the system: [ 613.791725] 2 locks held by khungtaskd/518: [ 613.796052] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.804808] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.814521] 2 locks held by getty/3774: [ 613.818465] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.827790] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.837772] 1 lock held by syz-executor076/3877: [ 613.842497] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 613.851835] [ 613.853436] ============================================= [ 613.853436] [ 613.860487] NMI backtrace for cpu 1 [ 613.864101] CPU: 1 PID: 518 Comm: khungtaskd Not tainted 4.9.102-gc5aceac #32 [ 613.871350] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 613.880679] ffff8801d912fd08 ffffffff81eb3489 0000000000000000 0000000000000001 [ 613.888655] 0000000000000001 0000000000000001 ffffffff810b9590 ffff8801d912fd40 [ 613.896628] ffffffff81ebe787 0000000000000001 0000000000000000 0000000000000003 [ 613.904604] Call Trace: [ 613.907214] [] dump_stack+0xc1/0x128 [ 613.912568] [] ? irq_force_complete_move+0x320/0x320 [ 613.919299] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 613.925764] [] ? irq_force_complete_move+0x320/0x320 [ 613.932493] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 613.939571] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 613.946555] [] watchdog+0x6b4/0xa20 [ 613.951805] [] ? watchdog+0x11c/0xa20 [ 613.957275] [] kthread+0x26d/0x300 [ 613.962448] [] ? reset_hung_task_detector+0x20/0x20 [ 613.969086] [] ? kthread_park+0xa0/0xa0 [ 613.974686] [] ? kthread_park+0xa0/0xa0 [ 613.980281] [] ? kthread_park+0xa0/0xa0 [ 613.985875] [] ret_from_fork+0x5c/0x70 [ 613.991473] Sending NMI from CPU 1 to CPUs 0: [ 613.995993] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f64f6 [ 614.003220] Kernel panic - not syncing: hung_task: blocked tasks [ 614.009354] CPU: 1 PID: 518 Comm: khungtaskd Not tainted 4.9.102-gc5aceac #32 [ 614.016596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.025926] ffff8801d912fcc8 ffffffff81eb3489 ffffffff83c8bb80 00000000ffffffff [ 614.033903] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d912fd88 [ 614.041880] ffffffff81421aa5 0000000041b58ab3 ffffffff843b94b0 ffffffff814218e6 [ 614.049855] Call Trace: [ 614.052415] [] dump_stack+0xc1/0x128 [ 614.057749] [] panic+0x1bf/0x3bc [ 614.062734] [] ? add_taint.cold.6+0x16/0x16 [ 614.068676] [] ? ___preempt_schedule+0x16/0x18 [ 614.074881] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.082124] [] watchdog+0x6c5/0xa20 [ 614.087371] [] ? watchdog+0x11c/0xa20 [ 614.092793] [] kthread+0x26d/0x300 [ 614.097962] [] ? reset_hung_task_detector+0x20/0x20 [ 614.104596] [] ? kthread_park+0xa0/0xa0 [ 614.110207] [] ? kthread_park+0xa0/0xa0 [ 614.115800] [] ? kthread_park+0xa0/0xa0 [ 614.121396] [] ret_from_fork+0x5c/0x70 [ 614.127577] Dumping ftrace buffer: [ 614.131153] (ftrace buffer empty) [ 614.134842] Kernel Offset: disabled [ 614.138453] Rebooting in 86400 seconds..