INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "6" 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 INIT: Id "1" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. executing program executing program INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "3" 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 INIT: Id "1" respawning too fast: disabled for 5 minutes [ 602.293233] INFO: task syz-executor938:3900 blocked for more than 120 seconds. [ 602.300613] Not tainted 4.4.132-g1d92c59 #49 [ 602.305722] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 602.313702] syz-executor938 D ffff8800ba88fa80 26368 3900 3898 0x00000000 [ 602.321266] ffff8800ba88fa80 0000000000000246 0000000000000296 0000000041b58ab3 [ 602.329341] ffffffff841e1300 ffff8801db31fdb8 ffff8801db31fde0 ffff8801db31f4d8 [ 602.337348] ffff8801db31f4c0 ffff8801d45a8000 ffff8801d45ab000 0000000000000000 [ 602.345372] Call Trace: [ 602.348098] [] schedule+0x7a/0x1b0 [ 602.353330] [] blk_mq_freeze_queue_wait+0x120/0x240 [ 602.359978] [] ? blk_mq_tags_cpumask+0x20/0x20 [ 602.366301] [] ? percpu_ref_kill_and_confirm+0xff/0x300 [ 602.373442] [] ? prepare_to_wait_event+0x430/0x430 [ 602.380010] [] blk_mq_freeze_queue+0x1d/0x20 [ 602.386101] [] lo_ioctl+0x722/0x1ad0 [ 602.391445] [] ? loop_probe+0x180/0x180 [ 602.397085] [] blkdev_ioctl+0x7b8/0x19c0 [ 602.402770] [] ? blkpg_ioctl+0x900/0x900 [ 602.408534] [] ? SYSC_adjtimex+0x130/0x130 [ 602.414429] [] ? mark_held_locks+0xc7/0x130 [ 602.420422] [] ? __fsnotify_update_child_dentry_flags.part.2+0x300/0x300 [ 602.428946] [] ? __mutex_unlock_slowpath+0x243/0x3b0 [ 602.435694] [] ? __mutex_unlock_slowpath+0x209/0x3b0 [ 602.442430] [] block_ioctl+0xde/0x120 [ 602.447881] [] ? blkdev_read_iter+0x170/0x170 [ 602.454033] [] do_vfs_ioctl+0x63f/0xf40 [ 602.459634] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 602.465870] [] ? __lock_is_held+0xa2/0xf0 [ 602.471676] [] ? do_sys_ftruncate.constprop.15+0x385/0x4a0 [ 602.479038] [] ? security_file_ioctl+0x8f/0xc0 [ 602.485283] [] SyS_ioctl+0x8f/0xc0 [ 602.490463] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 602.497158] 1 lock held by syz-executor938/3900: [ 602.501897] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1ad0 [ 602.511527] Sending NMI to all CPUs: [ 602.515509] NMI backtrace for cpu 0 [ 602.519111] CPU: 0 PID: 491 Comm: khungtaskd Not tainted 4.4.132-g1d92c59 #49 [ 602.526390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.535738] task: ffff8800bac81800 task.stack: ffff8800bac78000 [ 602.541766] RIP: 0010:[] [] flat_send_IPI_mask+0xf6/0x1a0 [ 602.550519] RSP: 0018:ffff8800bac7fcc8 EFLAGS: 00000046 [ 602.555953] RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000 [ 602.563237] RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300 [ 602.570481] RBP: ffff8800bac7fcf0 R08: 0000000000000001 R09: 0000000000000000 [ 602.577775] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 [ 602.585043] R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f7a0 [ 602.592291] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 602.600536] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 602.606416] CR2: 00007faee6f52000 CR3: 00000000b0ef0000 CR4: 00000000001606f0 [ 602.613954] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 602.621339] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 602.628636] Stack: [ 602.630771] ffffffff8446f7a0 ffffffff84a18a60 0000000000000007 fffffbfff0942bfc [ 602.638318] 0000000000000040 ffff8800bac7fd10 ffffffff810b5dd1 ffffffff83c0b1a0 [ 602.645848] 0000000000000003 ffff8800bac7fd68 ffffffff81e19023 ffffffff8140d9df [ 602.653374] Call Trace: [ 602.655929] [] nmi_raise_cpu_backtrace+0x61/0x80 [ 602.662304] [] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad [ 602.669850] [] ? print_lock+0x9f/0xa2 [ 602.675293] [] ? irq_force_complete_move+0x350/0x350 [ 602.682840] [] arch_trigger_all_cpu_backtrace+0x14/0x20 [ 602.689869] [] watchdog.cold.1+0xd3/0xee [ 602.695576] [] ? watchdog+0xb0/0x9a0 [ 602.700910] [] kthread+0x268/0x300 [ 602.706111] [] ? reset_hung_task_detector+0x20/0x20 [ 602.712755] [] ? kthread_create_on_node+0x400/0x400 [ 602.719429] [] ? kthread_create_on_node+0x400/0x400 [ 602.726091] [] ret_from_fork+0x55/0x80 [ 602.731599] [] ? kthread_create_on_node+0x400/0x400 [ 602.738275] 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 [ 602.757257] NMI backtrace for cpu 1 [ 602.760862] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.132-g1d92c59 #49 [ 602.767884] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.777241] task: ffff8801d9a41800 task.stack: ffff8801d9a50000 [ 602.783300] RIP: 0010:[] [] reschedule_interrupt+0x0/0xb0 [ 602.792022] RSP: 0018:ffff8801d9a57d78 EFLAGS: 00000046 [ 602.797479] RAX: 0000000000000007 RBX: ffffffff84a05b28 RCX: 0000000000000000 [ 602.804745] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801d9a420dc [ 602.811991] RBP: ffff8801d9a57da0 R08: 0000000000000000 R09: 0000000000000000 [ 602.819264] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 602.826530] R13: 0000000000000001 R14: fffffbfff074890c R15: ffffffff84a05b28 [ 602.833809] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 602.842106] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 602.848000] CR2: 00000000021c4000 CR3: 00000000b0ef0000 CR4: 00000000001606f0 [ 602.855263] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 602.862513] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 602.869791] Stack: [ 602.871920] ffffffff810cc306 0000000000000010 0000000000000246 ffff8801d9a57da0 [ 602.879449] 0000000000000018 ffff8801d9a57dd8 ffffffff81025da5 ffff8801d9a58000 [ 602.886981] 0000000000000000 0000000000000000 fffffbfff074890c ffffffff84a05b28 [ 602.894525] Call Trace: [ 602.897081] [] ? native_safe_halt+0x6/0x10 [ 602.902943] [] default_idle+0x55/0x3c0 [ 602.908496] [] arch_cpu_idle+0x10/0x20 [ 602.914030] [] default_idle_call+0x57/0x70 [ 602.919887] [] cpu_startup_entry+0x6af/0x780 [ 602.925945] [] ? call_cpuidle+0xe0/0xe0 [ 602.931551] [] start_secondary+0x324/0x400 [ 602.937447] [] ? set_cpu_sibling_map+0x1180/0x1180 [ 602.944026] Code: 04 25 94 66 01 00 65 48 0f 44 24 25 98 66 01 00 57 e8 5e 09 74 fd e8 70 58 7e fd e9 1b e7 ff ff 90 66 2e 0f 1f 84 00 00 00 00 00 <0f> 1f 00 68 02 ff ff ff fc 48 83 c4 88 4c 89 5c 24 30 4c 89 54 [ 602.963223] Kernel panic - not syncing: hung_task: blocked tasks [ 602.969443] CPU: 0 PID: 491 Comm: khungtaskd Not tainted 4.4.132-g1d92c59 #49 [ 602.976694] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.986028] 0000000000000000 6fe159b46e8288cc ffff8800bac7fcb8 ffffffff81e0dfad [ 602.994013] ffffffff83a835c0 0000000000000003 7fffffffffffffff 00000000003fff91 [ 603.002015] dffffc0000000000 ffff8800bac7fd78 ffffffff81409df4 0000000041b58ab3 [ 603.010039] Call Trace: [ 603.012600] [] dump_stack+0xc1/0x124 [ 603.017946] [] panic+0x19e/0x38d [ 603.022937] [] ? add_taint.cold.4+0x16/0x16 [ 603.028884] [] ? nmi_trigger_all_cpu_backtrace+0x3e6/0x488 [ 603.036215] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 603.043458] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 603.050719] [] watchdog.cold.1+0xe4/0xee [ 603.056403] [] ? watchdog+0xb0/0x9a0 [ 603.061739] [] kthread+0x268/0x300 [ 603.066903] [] ? reset_hung_task_detector+0x20/0x20 [ 603.073552] [] ? kthread_create_on_node+0x400/0x400 [ 603.080186] [] ? kthread_create_on_node+0x400/0x400 [ 603.086829] [] ret_from_fork+0x55/0x80 [ 603.092339] [] ? kthread_create_on_node+0x400/0x400 [ 603.099536] Dumping ftrace buffer: [ 603.103106] (ftrace buffer empty) [ 603.106791] Kernel Offset: disabled [ 603.110401] Rebooting in 86400 seconds..