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 "6" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes [ 415.957404] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. [ 421.346341] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program [ 472.949496] random: crng init done 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 "4" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes [ 613.730313] INFO: task syz-executor968:3860 blocked for more than 120 seconds. [ 613.737697] Not tainted 4.9.103-g70c65e4 #34 [ 613.742790] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.750803] syz-executor968 D27176 3860 3858 0x00000000 [ 613.756593] ffff8801d88f6000 0000000000000000 ffff8801d91eaa00 ffffffff84629800 [ 613.764703] ffff8801db221c18 ffff8801d84179f0 ffffffff839e711d 0000000000000002 [ 613.772720] 0000000041b58ab3 ffffffff843b9803 00ffffff81221330 ffff8801db2224e8 [ 613.780726] Call Trace: [ 613.783343] [] ? __schedule+0x64d/0x1bd0 [ 613.789030] [] schedule+0x7f/0x1b0 [ 613.794272] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 613.800933] [] ? plug_ctx_cmp+0x100/0x100 [ 613.806733] [] ? prepare_to_wait_event+0x450/0x450 [ 613.813341] [] blk_mq_freeze_queue+0x1d/0x20 [ 613.819410] [] lo_ioctl+0x722/0x1aa0 [ 613.824770] [] ? loop_lookup.part.19+0x110/0x110 [ 613.831157] [] blkdev_ioctl+0x7b6/0x1a70 [ 613.836837] [] ? blkpg_ioctl+0x920/0x920 [ 613.842581] [] ? fsnotify+0x114/0x1100 [ 613.848166] [] ? mark_held_locks+0xc7/0x130 [ 613.854226] [] block_ioctl+0xde/0x120 [ 613.859673] [] ? blkdev_fallocate+0x440/0x440 [ 613.865940] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.871651] [] ? ioctl_preallocate+0x220/0x220 [ 613.877888] [] ? selinux_capable+0x40/0x40 [ 613.883814] [] ? __lock_is_held+0xa2/0xf0 [ 613.890405] [] ? do_sys_ftruncate.constprop.16+0x373/0x4a0 [ 613.897844] [] ? security_file_ioctl+0x8f/0xc0 [ 613.904294] [] SyS_ioctl+0x8f/0xc0 [ 613.909486] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.915549] [] do_syscall_64+0x1a6/0x490 [ 613.921315] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.928306] [ 613.928306] Showing all locks held in the system: [ 613.934799] 2 locks held by khungtaskd/519: [ 613.939093] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.947857] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.957639] 1 lock held by rsyslogd/3682: [ 613.961795] #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 [ 613.970675] 2 locks held by getty/3778: [ 613.974618] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.983940] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.993944] 1 lock held by syz-executor968/3860: [ 613.998667] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 614.008017] [ 614.009614] ============================================= [ 614.009614] [ 614.016719] NMI backtrace for cpu 1 [ 614.020336] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.103-g70c65e4 #34 [ 614.027580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.036908] ffff8801d859fd08 ffffffff81eb3469 0000000000000000 0000000000000001 [ 614.044913] 0000000000000001 0000000000000001 ffffffff810b9590 ffff8801d859fd40 [ 614.052901] ffffffff81ebe767 0000000000000001 0000000000000000 0000000000000003 [ 614.060884] Call Trace: [ 614.063501] [] dump_stack+0xc1/0x128 [ 614.068872] [] ? irq_force_complete_move+0x320/0x320 [ 614.075623] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.082087] [] ? irq_force_complete_move+0x320/0x320 [ 614.088812] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.095880] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.102863] [] watchdog+0x6b4/0xa20 [ 614.108107] [] ? watchdog+0x11c/0xa20 [ 614.113562] [] kthread+0x26d/0x300 [ 614.118722] [] ? reset_hung_task_detector+0x20/0x20 [ 614.125354] [] ? kthread_park+0xa0/0xa0 [ 614.130946] [] ? kthread_park+0xa0/0xa0 [ 614.136541] [] ? kthread_park+0xa0/0xa0 [ 614.142139] [] ret_from_fork+0x5c/0x70 [ 614.147763] Sending NMI from CPU 1 to CPUs 0: [ 614.152277] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f6c26 [ 614.159527] Kernel panic - not syncing: hung_task: blocked tasks [ 614.165661] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.103-g70c65e4 #34 [ 614.172903] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.182228] ffff8801d859fcc8 ffffffff81eb3469 ffffffff83c8bb80 00000000ffffffff [ 614.190212] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d859fd88 [ 614.198182] ffffffff81421aa5 0000000041b58ab3 ffffffff843b94a8 ffffffff814218e6 [ 614.206156] Call Trace: [ 614.208720] [] dump_stack+0xc1/0x128 [ 614.214065] [] panic+0x1bf/0x3bc [ 614.219061] [] ? add_taint.cold.6+0x16/0x16 [ 614.225006] [] ? ___preempt_schedule+0x16/0x18 [ 614.231215] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.238459] [] watchdog+0x6c5/0xa20 [ 614.243713] [] ? watchdog+0x11c/0xa20 [ 614.249136] [] kthread+0x26d/0x300 [ 614.254297] [] ? reset_hung_task_detector+0x20/0x20 [ 614.260933] [] ? kthread_park+0xa0/0xa0 [ 614.266532] [] ? kthread_park+0xa0/0xa0 [ 614.272122] [] ? kthread_park+0xa0/0xa0 [ 614.277717] [] ret_from_fork+0x5c/0x70 [ 614.284044] Dumping ftrace buffer: [ 614.287601] (ftrace buffer empty) [ 614.291293] Kernel Offset: disabled [ 614.294909] Rebooting in 86400 seconds..