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 INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes [ 484.530127] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. [ 490.192933] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program [ 495.837131] random: crng init done INIT: Id "6" 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 INIT: Id "4" 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 [ 715.994963] INFO: task syz-executor122:3904 blocked for more than 140 seconds. [ 716.002368] Not tainted 4.9.112-g9e79039 #7 [ 716.007647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.015710] syz-executor122 D27176 3904 3902 0x00000000 [ 716.021512] ffff8801ba37b000 0000000000000000 ffff8801beae0fc0 ffffffff84629800 [ 716.029796] ffff8801db221c18 ffff8801d70379f0 ffffffff839e907d 0000000000000002 [ 716.037864] 0000000041b58ab3 ffffffff843bb1d3 00ffffff81221570 ffff8801db2224e8 [ 716.045907] Call Trace: [ 716.048553] [] ? __schedule+0x64d/0x1bd0 [ 716.054237] [] schedule+0x7f/0x1b0 [ 716.059513] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 716.066178] [] ? plug_ctx_cmp+0x100/0x100 [ 716.071975] [] ? prepare_to_wait_event+0x450/0x450 [ 716.078564] [] blk_mq_freeze_queue+0x1d/0x20 [ 716.084617] [] lo_ioctl+0x722/0x1aa0 [ 716.089985] [] ? loop_lookup.part.19+0x110/0x110 [ 716.096404] [] blkdev_ioctl+0x7b6/0x1a70 [ 716.102089] [] ? blkpg_ioctl+0x920/0x920 [ 716.107834] [] ? do_readv_writev+0x1fe/0x7a0 [ 716.113871] [] ? vfs_write+0x530/0x530 [ 716.119467] [] block_ioctl+0xde/0x120 [ 716.124915] [] ? blkdev_fallocate+0x440/0x440 [ 716.131048] [] do_vfs_ioctl+0x1ac/0x11a0 [ 716.137118] [] ? ioctl_preallocate+0x220/0x220 [ 716.143332] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 716.150313] [] ? selinux_capable+0x40/0x40 [ 716.156197] [] ? vfs_writev+0x8f/0xc0 [ 716.161624] [] ? do_pwritev+0x13e/0x240 [ 716.167318] [] ? security_file_ioctl+0x8f/0xc0 [ 716.173544] [] SyS_ioctl+0x8f/0xc0 [ 716.178745] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 716.184732] [] do_syscall_64+0x1a6/0x490 [ 716.190486] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 716.197414] [ 716.197414] Showing all locks held in the system: [ 716.203711] 2 locks held by khungtaskd/520: [ 716.208024] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 716.216749] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 716.226467] 2 locks held by getty/3779: [ 716.230412] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 716.239829] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 716.249964] 1 lock held by syz-executor122/3904: [ 716.254689] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 716.264046] [ 716.265677] ============================================= [ 716.265677] [ 716.272996] NMI backtrace for cpu 0 [ 716.276622] CPU: 0 PID: 520 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #7 [ 716.283780] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.293112] ffff8801d8b67d08 ffffffff81eb3249 0000000000000000 0000000000000000 [ 716.301122] 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d8b67d40 [ 716.309129] ffffffff81ebe547 0000000000000000 0000000000000000 0000000000000002 [ 716.317108] Call Trace: [ 716.319723] [] dump_stack+0xc1/0x128 [ 716.325092] [] ? irq_force_complete_move+0x320/0x320 [ 716.331815] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 716.338277] [] ? irq_force_complete_move+0x320/0x320 [ 716.345000] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 716.352072] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 716.359061] [] watchdog+0x6b4/0xa20 [ 716.364317] [] ? watchdog+0x11c/0xa20 [ 716.369786] [] kthread+0x26d/0x300 [ 716.374947] [] ? reset_hung_task_detector+0x20/0x20 [ 716.381583] [] ? kthread_park+0xa0/0xa0 [ 716.387179] [] ? kthread_park+0xa0/0xa0 [ 716.392772] [] ? kthread_park+0xa0/0xa0 [ 716.398367] [] ret_from_fork+0x5c/0x70 [ 716.403992] Sending NMI from CPU 0 to CPUs 1: [ 716.408539] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff839f8b86 [ 716.416052] Kernel panic - not syncing: hung_task: blocked tasks [ 716.422182] CPU: 1 PID: 520 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #7 [ 716.429343] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.438674] ffff8801d8b67cc8 ffffffff81eb3249 ffffffff83c8bc20 00000000ffffffff [ 716.446673] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d8b67d88 [ 716.454654] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 716.462648] Call Trace: [ 716.465210] [] dump_stack+0xc1/0x128 [ 716.470546] [] panic+0x1bf/0x3bc [ 716.475532] [] ? add_taint.cold.6+0x16/0x16 [ 716.481481] [] ? ___preempt_schedule+0x16/0x18 [ 716.487696] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 716.494956] [] watchdog+0x6c5/0xa20 [ 716.500221] [] ? watchdog+0x11c/0xa20 [ 716.505646] [] kthread+0x26d/0x300 [ 716.510805] [] ? reset_hung_task_detector+0x20/0x20 [ 716.517442] [] ? kthread_park+0xa0/0xa0 [ 716.523069] [] ? kthread_park+0xa0/0xa0 [ 716.528666] [] ? kthread_park+0xa0/0xa0 [ 716.534287] [] ret_from_fork+0x5c/0x70 [ 716.540378] Dumping ftrace buffer: [ 716.543933] (ftrace buffer empty) [ 716.547618] Kernel Offset: disabled [ 716.551224] Rebooting in 86400 seconds..