INIT: Id "3" 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 "5" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 482.227621] INFO: task syz-executor122:3889 blocked for more than 120 seconds. [ 482.235105] Not tainted 4.4.132-gc3c51ea #47 [ 482.240177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 482.248155] syz-executor122 D ffff8800ba5dfa80 26368 3889 3887 0x00000000 [ 482.256113] ffff8800ba5dfa80 0000000000000246 0000000000000296 0000000041b58ab3 [ 482.264930] ffffffff841e1300 ffff8801db31fdb8 ffff8801db31fde0 ffff8801db31f4d8 [ 482.274538] ffff8801db31f4c0 ffff8801cdf88000 ffff8801cdf8b000 0000000000000000 [ 482.282843] Call Trace: [ 482.285534] [] schedule+0x7a/0x1b0 [ 482.290805] [] blk_mq_freeze_queue_wait+0x120/0x240 [ 482.297486] [] ? blk_mq_tags_cpumask+0x20/0x20 [ 482.304084] [] ? percpu_ref_kill_and_confirm+0xff/0x300 [ 482.311161] [] ? prepare_to_wait_event+0x430/0x430 [ 482.317757] [] blk_mq_freeze_queue+0x1d/0x20 [ 482.323838] [] lo_ioctl+0x722/0x1ad0 [ 482.329227] [] ? loop_probe+0x180/0x180 [ 482.334924] [] blkdev_ioctl+0x7b8/0x19c0 [ 482.340668] [] ? blkpg_ioctl+0x900/0x900 [ 482.346401] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 482.353285] [] ? do_readv_writev+0x1c8/0x6e0 [ 482.359799] [] ? vfs_write+0x4e0/0x4e0 [ 482.365523] [] block_ioctl+0xde/0x120 [ 482.370992] [] ? blkdev_read_iter+0x170/0x170 [ 482.377215] [] do_vfs_ioctl+0x63f/0xf40 [ 482.382878] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 482.389814] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 482.396050] [] ? __kmalloc+0x1f6/0x310 [ 482.401599] [] ? vfs_writev+0x83/0xb0 [ 482.407083] [] ? security_file_ioctl+0x8f/0xc0 [ 482.413367] [] SyS_ioctl+0x8f/0xc0 [ 482.418584] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 482.425635] 1 lock held by syz-executor122/3889: [ 482.430620] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1ad0 [ 482.440135] Sending NMI to all CPUs: [ 482.444142] NMI backtrace for cpu 0 [ 482.447798] CPU: 0 PID: 491 Comm: khungtaskd Not tainted 4.4.132-gc3c51ea #47 [ 482.455045] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 482.464404] task: ffff8800bacc6000 task.stack: ffff8801d8d98000 [ 482.470461] RIP: 0010:[] [] flat_send_IPI_mask+0xf6/0x1a0 [ 482.479223] RSP: 0018:ffff8801d8d9fcc8 EFLAGS: 00000046 [ 482.484655] RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000 [ 482.491958] RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300 [ 482.499228] RBP: ffff8801d8d9fcf0 R08: 0000000000000001 R09: 0000000000000000 [ 482.507087] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 [ 482.514375] R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f7a0 [ 482.521655] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 482.529934] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 482.535980] CR2: 000000000097ab10 CR3: 00000001cbd3a000 CR4: 00000000001606f0 [ 482.543285] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 482.550563] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 482.557842] Stack: [ 482.559967] ffffffff8446f7a0 ffffffff84a18a60 0000000000000007 fffffbfff0942bfc [ 482.567505] 0000000000000040 ffff8801d8d9fd10 ffffffff810b5dd1 ffffffff83c0b1a0 [ 482.575012] 0000000000000003 ffff8801d8d9fd68 ffffffff81e19003 ffffffff8140d9cf [ 482.582574] Call Trace: [ 482.585138] [] nmi_raise_cpu_backtrace+0x61/0x80 [ 482.591642] [] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad [ 482.599172] [] ? print_lock+0x9f/0xa2 [ 482.604599] [] ? irq_force_complete_move+0x350/0x350 [ 482.611370] [] arch_trigger_all_cpu_backtrace+0x14/0x20 [ 482.618490] [] watchdog.cold.1+0xd3/0xee [ 482.624175] [] ? watchdog+0xb0/0x9a0 [ 482.629546] [] kthread+0x268/0x300 [ 482.634709] [] ? reset_hung_task_detector+0x20/0x20 [ 482.641368] [] ? kthread_create_on_node+0x400/0x400 [ 482.648021] [] ? kthread_create_on_node+0x400/0x400 [ 482.654661] [] ret_from_fork+0x55/0x80 [ 482.660205] [] ? kthread_create_on_node+0x400/0x400 [ 482.666853] Code: b3 5f ff f6 c4 10 75 e2 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 f2 09 da 80 cf 04 41 83 fe 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 75 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f2 [ 482.685937] NMI backtrace for cpu 1 [ 482.689560] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.132-gc3c51ea #47 [ 482.696550] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 482.705918] task: ffff8801d9a41800 task.stack: ffff8801d9a50000 [ 482.711973] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 482.720414] RSP: 0018:ffff8801d9a57da0 EFLAGS: 00000246 [ 482.725840] RAX: 0000000000000007 RBX: ffffffff84a05b28 RCX: 0000000000000000 [ 482.733118] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801d9a420dc [ 482.740382] RBP: ffff8801d9a57da0 R08: 0000000000000000 R09: 0000000000000000 [ 482.747666] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 482.754912] R13: 0000000000000001 R14: fffffbfff074890c R15: ffffffff84a05b28 [ 482.763056] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 482.771300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 482.777247] CR2: 00007f5ad8b71000 CR3: 00000001cbd3a000 CR4: 00000000001606f0 [ 482.784536] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 482.791813] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 482.799288] Stack: [ 482.801411] ffff8801d9a57dd8 ffffffff81025da5 ffff8801d9a58000 0000000000000000 [ 482.808946] 0000000000000000 fffffbfff074890c ffffffff84a05b28 ffff8801d9a57de8 [ 482.816462] ffffffff810272f0 ffff8801d9a57e00 ffffffff8121b9e7 dffffc0000000000 [ 482.824009] Call Trace: [ 482.826569] [] default_idle+0x55/0x3c0 [ 482.832116] [] arch_cpu_idle+0x10/0x20 [ 482.837639] [] default_idle_call+0x57/0x70 [ 482.843516] [] cpu_startup_entry+0x6af/0x780 [ 482.849577] [] ? call_cpuidle+0xe0/0xe0 [ 482.855177] [] start_secondary+0x324/0x400 [ 482.861151] [] ? set_cpu_sibling_map+0x1180/0x1180 [ 482.867724] Code: 00 00 00 00 00 55 48 89 e5 fa 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 66 0f 1f 84 [ 482.887077] Kernel panic - not syncing: hung_task: blocked tasks [ 482.893219] CPU: 0 PID: 491 Comm: khungtaskd Not tainted 4.4.132-gc3c51ea #47 [ 482.900561] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 482.909890] 0000000000000000 8564544a54598b80 ffff8801d8d9fcb8 ffffffff81e0df8d [ 482.917893] ffffffff83a835c0 0000000000000003 7fffffffffffffff 00000000003fff91 [ 482.925876] dffffc0000000000 ffff8801d8d9fd78 ffffffff81409de4 0000000041b58ab3 [ 482.933870] Call Trace: [ 482.936435] [] dump_stack+0xc1/0x124 [ 482.941771] [] panic+0x19e/0x38d [ 482.946763] [] ? add_taint.cold.4+0x16/0x16 [ 482.952807] [] ? nmi_trigger_all_cpu_backtrace+0x3e6/0x488 [ 482.960055] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 482.967577] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 482.974828] [] watchdog.cold.1+0xe4/0xee [ 482.980514] [] ? watchdog+0xb0/0x9a0 [ 482.985861] [] kthread+0x268/0x300 [ 482.991026] [] ? reset_hung_task_detector+0x20/0x20 [ 482.997664] [] ? kthread_create_on_node+0x400/0x400 [ 483.004309] [] ? kthread_create_on_node+0x400/0x400 [ 483.010952] [] ret_from_fork+0x55/0x80 [ 483.016464] [] ? kthread_create_on_node+0x400/0x400 [ 483.023738] Dumping ftrace buffer: [ 483.027292] (ftrace buffer empty) [ 483.030975] Kernel Offset: disabled [ 483.034588] Rebooting in 86400 seconds..