INIT: Id "4" 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 "1" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. executing program executing program INIT: Id "2" 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 "4" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes [ 602.244461] INFO: task syz-executor259:3935 blocked for more than 120 seconds. [ 602.251832] Not tainted 4.4.136-ge4798d7 #60 [ 602.257108] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 602.265100] syz-executor259 D ffff8800b9abfa80 29232 3935 3931 0x00000004 [ 602.272628] ffff8800b9abfa80 0000000000000246 0000000000000296 0000000041b58ab3 [ 602.280677] ffffffff841e1a00 ffff8801db21fdb8 ffff8801db21fde0 ffff8801db21f4d8 [ 602.288786] ffff8801db21f4c0 ffffffff84417840 ffff8801d7ef4800 0000000000000000 [ 602.296902] Call Trace: [ 602.299575] [] schedule+0x7a/0x1b0 [ 602.304832] [] blk_mq_freeze_queue_wait+0x120/0x240 [ 602.311479] [] ? blk_mq_tags_cpumask+0x20/0x20 [ 602.317775] [] ? percpu_ref_kill_and_confirm+0xff/0x300 [ 602.324826] [] ? prepare_to_wait_event+0x430/0x430 [ 602.331384] [] blk_mq_freeze_queue+0x1d/0x20 [ 602.337529] [] lo_ioctl+0x722/0x1ad0 [ 602.342875] [] ? loop_probe+0x180/0x180 [ 602.348528] [] blkdev_ioctl+0x7b8/0x19c0 [ 602.354215] [] ? blkpg_ioctl+0x900/0x900 [ 602.360007] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 602.366870] [] ? do_readv_writev+0x1c8/0x6e0 [ 602.372901] [] ? vfs_write+0x4e0/0x4e0 [ 602.378472] [] block_ioctl+0xde/0x120 [ 602.383899] [] ? blkdev_read_iter+0x170/0x170 [ 602.390092] [] do_vfs_ioctl+0x63f/0xf40 [ 602.395723] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 602.402622] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 602.408889] [] ? kmem_cache_alloc+0xa6/0x2a0 [ 602.414950] [] ? vfs_writev+0x83/0xb0 [ 602.420424] [] ? security_file_ioctl+0x8f/0xc0 [ 602.426683] [] SyS_ioctl+0x8f/0xc0 [ 602.431853] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 602.438487] 1 lock held by syz-executor259/3935: [ 602.443227] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1ad0 [ 602.452735] Sending NMI to all CPUs: [ 602.457796] NMI backtrace for cpu 0 [ 602.461401] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.136-ge4798d7 #60 [ 602.468426] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.477778] task: ffffffff84417840 task.stack: ffffffff84400000 [ 602.483808] RIP: 0010:[] [] scheduler_ipi+0xa9/0x510 [ 602.492126] RSP: 0018:ffff8801db207f68 EFLAGS: 00000046 [ 602.497561] RAX: dffffc0000000000 RBX: 000000000001f4c0 RCX: 1ffffffff09429a0 [ 602.504836] RDX: 1ffff1003b644004 RSI: ffffffff81e6e93b RDI: ffff8801db220020 [ 602.512103] RBP: ffff8801db207f90 R08: 0000000000000000 R09: 0000000000000000 [ 602.519402] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801db21f4c0 [ 602.526708] R13: 0000000000000000 R14: fffffbfff074890c R15: ffffffff84a05f68 [ 602.533974] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 602.542264] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 602.548179] CR2: 00007ff5eb00d000 CR3: 00000001cb5ae000 CR4: 00000000001606f0 [ 602.555486] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 602.562735] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 602.570016] Stack: [ 602.572145] 0000000000000000 ffffffff8446f7a0 0000000000000000 0000000000000000 [ 602.579681] fffffbfff074890c ffff8801db207fa8 ffffffff810a7887 ffffffff84a05f68 [ 602.587223] ffffffff84407dc8 ffffffff838c4d30 ffffffff84407d18 ffffffff84a05f68 [ 602.595388] Call Trace: [ 602.597948] d [] smp_reschedule_interrupt+0x67/0x80 [ 602.605220] [] reschedule_interrupt+0xa0/0xb0 [ 602.611335] d [] ? native_safe_halt+0x6/0x10 [ 602.618028] [] ? trace_hardirqs_on+0xd/0x10 [ 602.623981] [] default_idle+0x55/0x3c0 [ 602.629543] [] arch_cpu_idle+0x10/0x20 [ 602.635076] [] default_idle_call+0x57/0x70 [ 602.640943] [] cpu_startup_entry+0x6af/0x780 [ 602.647017] [] ? call_cpuidle+0xe0/0xe0 [ 602.652622] [] rest_init+0x188/0x18e [ 602.658004] [] start_kernel+0x6b3/0x6e7 [ 602.663612] [] ? thread_stack_cache_init+0xb/0xb [ 602.670025] [] ? early_idt_handler_array+0x120/0x120 [ 602.676774] [] ? early_idt_handler_array+0x120/0x120 [ 602.683507] [] x86_64_start_reservations+0x29/0x2b [ 602.690099] [] x86_64_start_kernel+0x13f/0x162 [ 602.696334] Code: 0f 85 be 03 00 00 4c 03 24 c5 00 4d a1 84 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 60 0b 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 af 03 00 00 49 8b 84 24 60 0b 00 00 48 85 c0 0f 84 f6 01 [ 602.715357] NMI backtrace for cpu 1 [ 602.718960] CPU: 1 PID: 492 Comm: khungtaskd Not tainted 4.4.136-ge4798d7 #60 [ 602.726241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.735588] task: ffff8800bac14800 task.stack: ffff8800bba80000 [ 602.741618] RIP: 0010:[] [] flat_send_IPI_mask+0xf6/0x1a0 [ 602.750381] RSP: 0018:ffff8800bba87cc8 EFLAGS: 00000046 [ 602.755823] RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000 [ 602.763075] RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300 [ 602.770370] RBP: ffff8800bba87cf0 R08: 0000000000000001 R09: 0000000000000000 [ 602.777646] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 [ 602.784919] R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f7a0 [ 602.792170] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 602.800415] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 602.806293] CR2: 00007ff5eb00d000 CR3: 00000001cb5ae000 CR4: 00000000001606f0 [ 602.813626] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 602.820908] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 602.828173] Stack: [ 602.830297] ffffffff8446f7a0 ffffffff84a18ea0 0000000000000007 fffffbfff0942c84 [ 602.837916] 0000000000000040 ffff8800bba87d10 ffffffff810b5e71 ffffffff83c0b560 [ 602.845456] 0000000000000003 ffff8800bba87d68 ffffffff81e19e23 ffffffff8140dd6f [ 602.852959] Call Trace: [ 602.855544] [] nmi_raise_cpu_backtrace+0x61/0x80 [ 602.861920] [] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad [ 602.869447] [] ? print_lock+0x9f/0xa2 [ 602.874889] [] ? irq_force_complete_move+0x350/0x350 [ 602.881622] [] arch_trigger_all_cpu_backtrace+0x14/0x20 [ 602.888640] [] watchdog.cold.1+0xd3/0xee [ 602.894349] [] ? watchdog+0xb0/0x9a0 [ 602.899699] [] kthread+0x268/0x300 [ 602.904881] [] ? reset_hung_task_detector+0x20/0x20 [ 602.911523] [] ? kthread_create_on_node+0x400/0x400 [ 602.918211] [] ? kthread_create_on_node+0x400/0x400 [ 602.924979] [] ret_from_fork+0x55/0x80 [ 602.930489] [] ? kthread_create_on_node+0x400/0x400 [ 602.937156] 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 72 [ 602.956324] Kernel panic - not syncing: hung_task: blocked tasks [ 602.962486] CPU: 0 PID: 492 Comm: khungtaskd Not tainted 4.4.136-ge4798d7 #60 [ 602.969729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.979057] 0000000000000000 8c3a2b872c9644f4 ffff8800bba87cb8 ffffffff81e0edad [ 602.987069] ffffffff83a837e0 0000000000000003 7fffffffffffffff 00000000003fff8f [ 602.995059] dffffc0000000000 ffff8800bba87d78 ffffffff8140a184 0000000041b58ab3 [ 603.003043] Call Trace: [ 603.005616] [] dump_stack+0xc1/0x124 [ 603.010954] [] panic+0x19e/0x38d [ 603.015939] [] ? add_taint.cold.4+0x16/0x16 [ 603.021882] [] ? nmi_trigger_all_cpu_backtrace+0x3e6/0x488 [ 603.029125] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 603.036382] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 603.043624] [] watchdog.cold.1+0xe4/0xee [ 603.049319] [] ? watchdog+0xb0/0x9a0 [ 603.054665] [] kthread+0x268/0x300 [ 603.059839] [] ? reset_hung_task_detector+0x20/0x20 [ 603.066501] [] ? kthread_create_on_node+0x400/0x400 [ 603.073144] [] ? kthread_create_on_node+0x400/0x400 [ 603.080421] [] ret_from_fork+0x55/0x80 [ 603.085947] [] ? kthread_create_on_node+0x400/0x400 [ 603.093095] Dumping ftrace buffer: [ 603.096654] (ftrace buffer empty) [ 603.100346] Kernel Offset: disabled [ 603.103959] Rebooting in 86400 seconds..