INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" 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 [ 779.792989] random: sshd: uninitialized urandom read (32 bytes read) [ 779.894008] random: crng init done Warning: Permanently added '10.128.10.37' (ECDSA) to the list of known hosts. executing program INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "4" 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 "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes [ 1002.669136] INFO: task syz-executor338:3916 blocked for more than 140 seconds. [ 1002.676513] Not tainted 4.9.111-g03c70fe #58 [ 1002.681449] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.689644] syz-executor338 D28928 3916 3910 0x00000004 [ 1002.695423] ffff8801d9516000 0000000000000000 ffff8801d7896a00 ffffffff84629800 [ 1002.703464] ffff8801db221c18 ffff8801d70a79f0 ffffffff839e7ded 0000000000000002 [ 1002.711472] 0000000041b58ab3 ffffffff843bac1b 00ffffff81221510 ffff8801db2224e8 [ 1002.719473] Call Trace: [ 1002.722118] [] ? __schedule+0x64d/0x1bd0 [ 1002.727801] [] schedule+0x7f/0x1b0 [ 1002.733031] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 1002.739686] [] ? plug_ctx_cmp+0x100/0x100 [ 1002.745495] [] ? prepare_to_wait_event+0x450/0x450 [ 1002.752074] [] blk_mq_freeze_queue+0x1d/0x20 [ 1002.758137] [] lo_ioctl+0x722/0x1aa0 [ 1002.763495] [] ? loop_lookup.part.19+0x110/0x110 [ 1002.769893] [] blkdev_ioctl+0x7b6/0x1a70 [ 1002.775574] [] ? blkpg_ioctl+0x920/0x920 [ 1002.781291] [] ? __lock_acquire+0x654/0x4070 [ 1002.787348] [] ? exit_robust_list+0x220/0x220 [ 1002.793532] [] ? vfs_write+0x530/0x530 [ 1002.799103] [] block_ioctl+0xde/0x120 [ 1002.804522] [] ? blkdev_fallocate+0x440/0x440 [ 1002.810658] [] do_vfs_ioctl+0x1ac/0x11a0 [ 1002.816353] [] ? ioctl_preallocate+0x220/0x220 [ 1002.822595] [] ? selinux_capable+0x40/0x40 [ 1002.828461] [] ? __fget+0x20a/0x3b0 [ 1002.833725] [] ? __fget+0x231/0x3b0 [ 1002.838971] [] ? __fget+0x47/0x3b0 [ 1002.844175] [] ? security_file_ioctl+0x8f/0xc0 [ 1002.850394] [] SyS_ioctl+0x8f/0xc0 [ 1002.855550] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 1002.861518] [] do_syscall_64+0x1a6/0x490 [ 1002.867202] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 1002.874114] [ 1002.874114] Showing all locks held in the system: [ 1002.880418] 2 locks held by khungtaskd/519: [ 1002.884705] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 1002.893457] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 1002.903128] 2 locks held by getty/3775: [ 1002.907072] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 1002.916389] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 1002.926334] 1 lock held by syz-executor338/3916: [ 1002.931087] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 1002.940413] [ 1002.942011] ============================================= [ 1002.942011] [ 1002.949071] NMI backtrace for cpu 1 [ 1002.952673] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.111-g03c70fe #58 [ 1002.959914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1002.969237] ffff8801d8a3fd08 ffffffff81eb2729 0000000000000000 0000000000000001 [ 1002.977205] 0000000000000001 0000000000000001 ffffffff810b9af0 ffff8801d8a3fd40 [ 1002.985172] ffffffff81ebda27 0000000000000001 0000000000000000 0000000000000003 [ 1002.993139] Call Trace: [ 1002.995712] [] dump_stack+0xc1/0x128 [ 1003.001070] [] ? irq_force_complete_move+0x320/0x320 [ 1003.007791] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 1003.014250] [] ? irq_force_complete_move+0x320/0x320 [ 1003.020970] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 1003.028041] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1003.035022] [] watchdog+0x6b4/0xa20 [ 1003.040265] [] ? watchdog+0x11c/0xa20 [ 1003.045709] [] kthread+0x26d/0x300 [ 1003.050868] [] ? reset_hung_task_detector+0x20/0x20 [ 1003.057503] [] ? kthread_park+0xa0/0xa0 [ 1003.063096] [] ? kthread_park+0xa0/0xa0 [ 1003.068686] [] ? kthread_park+0xa0/0xa0 [ 1003.074279] [] ret_from_fork+0x5c/0x70 [ 1003.079874] Sending NMI from CPU 1 to CPUs 0: [ 1003.084372] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f78f6 [ 1003.091629] Kernel panic - not syncing: hung_task: blocked tasks [ 1003.097762] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.111-g03c70fe #58 [ 1003.105006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1003.114332] ffff8801d8a3fcc8 ffffffff81eb2729 ffffffff83c8bc20 00000000ffffffff [ 1003.122303] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d8a3fd88 [ 1003.130289] ffffffff814219f5 0000000041b58ab3 ffffffff843ba8c0 ffffffff81421836 [ 1003.138269] Call Trace: [ 1003.140827] [] dump_stack+0xc1/0x128 [ 1003.146168] [] panic+0x1bf/0x3bc [ 1003.151161] [] ? add_taint.cold.6+0x16/0x16 [ 1003.157107] [] ? ___preempt_schedule+0x16/0x18 [ 1003.163310] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 1003.170551] [] watchdog+0x6c5/0xa20 [ 1003.175794] [] ? watchdog+0x11c/0xa20 [ 1003.181212] [] kthread+0x26d/0x300 [ 1003.186369] [] ? reset_hung_task_detector+0x20/0x20 [ 1003.193000] [] ? kthread_park+0xa0/0xa0 [ 1003.198591] [] ? kthread_park+0xa0/0xa0 [ 1003.204182] [] ? kthread_park+0xa0/0xa0 [ 1003.209775] [] ret_from_fork+0x5c/0x70 [ 1003.215811] Dumping ftrace buffer: [ 1003.219338] (ftrace buffer empty) [ 1003.223017] Kernel Offset: disabled [ 1003.226618] Rebooting in 86400 seconds..