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 "3" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes [ 443.055440] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts. [ 448.627084] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program [ 478.613936] 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 "3" 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 "1" respawning too fast: disabled for 5 minutes [ 716.051825] INFO: task syz-executor940:3865 blocked for more than 140 seconds. [ 716.059235] Not tainted 4.9.112-g9e79039 #59 [ 716.064294] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.072331] syz-executor940 D27720 3865 3863 0x00000000 [ 716.078057] ffff8801d837c800 0000000000000000 ffff8801c0320000 ffff8801d9a6b000 [ 716.086158] ffff8801db321c18 ffff8801d829f9f0 ffffffff839e907d 0000000000000002 [ 716.094533] 0000000041b58ab3 ffffffff843bb1d3 00ffffff81221570 ffff8801db3224e8 [ 716.102567] Call Trace: [ 716.105139] [] ? __schedule+0x64d/0x1bd0 [ 716.110825] [] schedule+0x7f/0x1b0 [ 716.116030] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 716.122708] [] ? plug_ctx_cmp+0x100/0x100 [ 716.128479] [] ? prepare_to_wait_event+0x450/0x450 [ 716.135059] [] blk_mq_freeze_queue+0x1d/0x20 [ 716.141102] [] lo_ioctl+0x722/0x1aa0 [ 716.146463] [] ? loop_lookup.part.19+0x110/0x110 [ 716.152875] [] blkdev_ioctl+0x7b6/0x1a70 [ 716.158568] [] ? blkpg_ioctl+0x920/0x920 [ 716.164282] [] ? do_readv_writev+0x1fe/0x7a0 [ 716.170327] [] ? vfs_write+0x530/0x530 [ 716.175916] [] block_ioctl+0xde/0x120 [ 716.181344] [] ? blkdev_fallocate+0x440/0x440 [ 716.187512] [] do_vfs_ioctl+0x1ac/0x11a0 [ 716.193230] [] ? ioctl_preallocate+0x220/0x220 [ 716.199438] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 716.206371] [] ? selinux_capable+0x40/0x40 [ 716.212261] [] ? vfs_writev+0x8f/0xc0 [ 716.217773] [] ? do_pwritev+0x13e/0x240 [ 716.223761] [] ? security_file_ioctl+0x8f/0xc0 [ 716.229967] [] SyS_ioctl+0x8f/0xc0 [ 716.235172] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 716.241153] [] do_syscall_64+0x1a6/0x490 [ 716.246887] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 716.253811] [ 716.253811] Showing all locks held in the system: [ 716.260116] 2 locks held by khungtaskd/520: [ 716.264444] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 716.273175] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 716.283097] 2 locks held by getty/3771: [ 716.287046] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 716.296373] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 716.306350] 1 lock held by syz-executor940/3865: [ 716.311072] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 716.320446] [ 716.322081] ============================================= [ 716.322081] [ 716.329112] NMI backtrace for cpu 1 [ 716.332761] CPU: 1 PID: 520 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #59 [ 716.340015] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.349348] ffff8801d86cfd08 ffffffff81eb3249 0000000000000000 0000000000000001 [ 716.357335] 0000000000000001 0000000000000001 ffffffff810b9bd0 ffff8801d86cfd40 [ 716.365425] ffffffff81ebe547 0000000000000001 0000000000000000 0000000000000003 [ 716.373409] Call Trace: [ 716.375968] [] dump_stack+0xc1/0x128 [ 716.381303] [] ? irq_force_complete_move+0x320/0x320 [ 716.388041] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 716.394501] [] ? irq_force_complete_move+0x320/0x320 [ 716.401222] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 716.408301] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 716.415285] [] watchdog+0x6b4/0xa20 [ 716.420532] [] ? watchdog+0x11c/0xa20 [ 716.425955] [] kthread+0x26d/0x300 [ 716.431114] [] ? reset_hung_task_detector+0x20/0x20 [ 716.437746] [] ? kthread_park+0xa0/0xa0 [ 716.443343] [] ? kthread_park+0xa0/0xa0 [ 716.448936] [] ? kthread_park+0xa0/0xa0 [ 716.454538] [] ret_from_fork+0x5c/0x70 [ 716.460154] Sending NMI from CPU 1 to CPUs 0: [ 716.464697] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f8b86 [ 716.472054] Kernel panic - not syncing: hung_task: blocked tasks [ 716.478192] CPU: 1 PID: 520 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #59 [ 716.485436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.494767] ffff8801d86cfcc8 ffffffff81eb3249 ffffffff83c8bc20 00000000ffffffff [ 716.502770] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d86cfd88 [ 716.510758] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 716.518757] Call Trace: [ 716.521318] [] dump_stack+0xc1/0x128 [ 716.526654] [] panic+0x1bf/0x3bc [ 716.531643] [] ? add_taint.cold.6+0x16/0x16 [ 716.537588] [] ? ___preempt_schedule+0x16/0x18 [ 716.543806] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 716.551059] [] watchdog+0x6c5/0xa20 [ 716.556308] [] ? watchdog+0x11c/0xa20 [ 716.561817] [] kthread+0x26d/0x300 [ 716.566991] [] ? reset_hung_task_detector+0x20/0x20 [ 716.573637] [] ? kthread_park+0xa0/0xa0 [ 716.579231] [] ? kthread_park+0xa0/0xa0 [ 716.584826] [] ? kthread_park+0xa0/0xa0 [ 716.590772] [] ret_from_fork+0x5c/0x70 [ 716.596999] Dumping ftrace buffer: [ 716.600554] (ftrace buffer empty) [ 716.604246] Kernel Offset: disabled [ 716.607851] Rebooting in 86400 seconds..