INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "2" 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 [ 440.397962] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.20' (ECDSA) to the list of known hosts. [ 445.922490] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program 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 INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes [ 529.986470] random: crng init done [ 716.064705] INFO: task loop0:3750 blocked for more than 140 seconds. [ 716.071250] Not tainted 4.9.112-g9e79039 #59 [ 716.076242] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.084513] loop0 D26344 3750 2 0x00000000 [ 716.090331] ffff8801c0da1800 0000000000000000 ffff8801c0c3c000 ffffffff84629800 [ 716.098726] ffff8801db221c18 ffff8801d8adedf0 ffffffff839e907d 0000000041b58ab3 [ 716.106738] ffffffff843c36c0 ffffffff812361d0 0000000000000000 ffff8801db2224e8 [ 716.114735] Call Trace: [ 716.117423] [] ? __schedule+0x64d/0x1bd0 [ 716.123145] [] ? debug_check_no_locks_freed+0x210/0x210 [ 716.130179] [] schedule+0x7f/0x1b0 [ 716.135399] [] schedule_timeout+0x861/0xf70 [ 716.141343] [] ? usleep_range+0x140/0x140 [ 716.147189] [] ? kvm_clock_read+0x23/0x40 [ 716.152959] [] ? kvm_clock_get_cycles+0x9/0x10 [ 716.159214] [] ? ktime_get+0x185/0x1e0 [ 716.164761] [] ? __delayacct_blkio_start+0x41/0x80 [ 716.171320] [] io_schedule_timeout+0x1ba/0x390 [ 716.177579] [] bt_get.isra.8+0x27c/0x780 [ 716.183288] [] ? __unwind_start+0x14d/0x3c0 [ 716.189260] [] ? blk_mq_reinit_tagset+0x310/0x310 [ 716.195748] [] ? prepare_to_wait_event+0x450/0x450 [ 716.202299] [] ? __lock_acquire+0x654/0x4070 [ 716.208354] [] blk_mq_get_tag+0xac/0x220 [ 716.214079] [] __blk_mq_alloc_request+0x2a/0xaa0 [ 716.220480] [] blk_mq_map_request.isra.38+0x3ab/0x900 [ 716.227657] [] ? blk_mq_map_request.isra.38+0xb2/0x900 [ 716.235192] [] ? blk_mq_exit_hctx.isra.42+0x3c0/0x3c0 [ 716.242013] [] blk_sq_make_request+0x1d6/0x1220 [ 716.248361] [] ? blk_queue_enter+0x315/0x620 [ 716.254403] [] ? blk_mq_insert_requests+0x900/0x900 [ 716.261061] [] ? generic_make_request_checks+0x4f4/0x1610 [ 716.268233] [] ? blk_exit_rl+0x50/0x50 [ 716.273790] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 716.280626] [] generic_make_request+0x20e/0x9b0 [ 716.286940] [] ? debug_check_no_locks_freed+0x210/0x210 [ 716.294108] [] ? blk_queue_enter+0x620/0x620 [ 716.300230] [] ? do_direct_IO+0x11db/0x9710 [ 716.306203] [] ? debug_check_no_locks_freed+0x210/0x210 [ 716.313188] [] submit_bio+0xb0/0x460 [ 716.318556] [] ? generic_make_request+0x9b0/0x9b0 [ 716.325046] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 716.331957] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 716.338795] [] do_blockdev_direct_IO+0x35da/0x5a80 [ 716.345461] [] ? find_get_pages_tag+0x494/0x9f0 [ 716.351775] [] ? do_direct_IO+0x9710/0x9710 [ 716.358183] [] ? find_get_entries_tag+0x920/0x920 [ 716.364734] [] ? write_cache_pages+0xef0/0xef0 [ 716.370947] [] ? current_kernel_time64+0xc9/0x120 [ 716.377464] [] ? timespec_trunc+0xc1/0x160 [ 716.383426] [] ? I_BDEV+0x20/0x20 [ 716.388586] [] ? __atime_needs_update+0x2bd/0x950 [ 716.395077] [] ? __filemap_fdatawrite_range+0x1bb/0x250 [ 716.402075] [] ? I_BDEV+0x20/0x20 [ 716.407183] [] __blockdev_direct_IO+0xa5/0xd0 [ 716.413331] [] blkdev_direct_IO+0xa0/0xd0 [ 716.419178] [] generic_file_read_iter+0x660/0x1a90 [ 716.425847] [] ? update_sd_lb_stats+0x3a20/0x3a20 [ 716.432332] [] ? wait_on_page_bit_killable+0x140/0x140 [ 716.439298] [] blkdev_read_iter+0x105/0x170 [ 716.445326] [] lo_rw_aio+0x6b3/0x8a0 [ 716.450669] [] ? transfer_xor+0x460/0x460 [ 716.456500] [] ? lock_is_held+0x140/0x140 [ 716.462282] [] loop_queue_work+0x3d7/0x2320 [ 716.468300] [] ? debug_check_no_locks_freed+0x210/0x210 [ 716.475314] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 716.481607] [] ? lo_rw_aio+0x8a0/0x8a0 [ 716.487472] [] ? _raw_spin_unlock_irq+0x38/0x50 [ 716.493766] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 716.500083] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 716.506961] [] kthread_worker_fn+0x249/0x6b0 [ 716.512992] [] ? __kthread_init_worker+0x100/0x100 [ 716.519596] [] ? __kthread_parkme+0x175/0x240 [ 716.525752] [] kthread+0x26d/0x300 [ 716.530914] [] ? __kthread_init_worker+0x100/0x100 [ 716.537580] [] ? kthread_park+0xa0/0xa0 [ 716.543187] [] ? kthread_park+0xa0/0xa0 [ 716.548818] [] ? kthread_park+0xa0/0xa0 [ 716.554489] [] ret_from_fork+0x5c/0x70 [ 716.560043] [ 716.560043] Showing all locks held in the system: [ 716.566360] 2 locks held by khungtaskd/519: [ 716.571097] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 716.579860] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 716.589604] 2 locks held by getty/3646: [ 716.593550] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 716.602879] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 716.612861] 1 lock held by syz-executor894/3752: [ 716.617616] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 716.626999] [ 716.628599] ============================================= [ 716.628599] [ 716.636077] NMI backtrace for cpu 0 [ 716.639740] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #59 [ 716.646983] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.656317] ffff8801d8c27d08 ffffffff81eb3249 0000000000000000 0000000000000000 [ 716.664294] 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d8c27d40 [ 716.672287] ffffffff81ebe547 0000000000000000 0000000000000000 0000000000000003 [ 716.680273] Call Trace: [ 716.682918] [] dump_stack+0xc1/0x128 [ 716.688313] [] ? irq_force_complete_move+0x320/0x320 [ 716.695040] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 716.701504] [] ? irq_force_complete_move+0x320/0x320 [ 716.708234] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 716.715304] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 716.722311] [] watchdog+0x6b4/0xa20 [ 716.727567] [] ? watchdog+0x11c/0xa20 [ 716.732988] [] kthread+0x26d/0x300 [ 716.738158] [] ? reset_hung_task_detector+0x20/0x20 [ 716.744792] [] ? kthread_park+0xa0/0xa0 [ 716.750388] [] ? kthread_park+0xa0/0xa0 [ 716.755981] [] ? kthread_park+0xa0/0xa0 [ 716.761578] [] ret_from_fork+0x5c/0x70 [ 716.767187] Sending NMI from CPU 0 to CPUs 1: [ 716.771695] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff839f8b86 [ 716.778965] Kernel panic - not syncing: hung_task: blocked tasks [ 716.785112] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #59 [ 716.792351] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.801690] ffff8801d8c27cc8 ffffffff81eb3249 ffffffff83c8bc20 00000000ffffffff [ 716.809911] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d8c27d88 [ 716.817911] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 716.825887] Call Trace: [ 716.828450] [] dump_stack+0xc1/0x128 [ 716.833787] [] panic+0x1bf/0x3bc [ 716.838777] [] ? add_taint.cold.6+0x16/0x16 [ 716.844782] [] ? ___preempt_schedule+0x16/0x18 [ 716.850985] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 716.858229] [] watchdog+0x6c5/0xa20 [ 716.863479] [] ? watchdog+0x11c/0xa20 [ 716.868925] [] kthread+0x26d/0x300 [ 716.874085] [] ? reset_hung_task_detector+0x20/0x20 [ 716.880726] [] ? kthread_park+0xa0/0xa0 [ 716.886322] [] ? kthread_park+0xa0/0xa0 [ 716.891920] [] ? kthread_park+0xa0/0xa0 [ 716.897516] [] ret_from_fork+0x5c/0x70 [ 716.903567] Dumping ftrace buffer: [ 716.907116] (ftrace buffer empty) [ 716.910798] Kernel Offset: disabled [ 716.914405] Rebooting in 86400 seconds..