INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "4" 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 Warning: Permanently added '10.128.0.49' (ECDSA) to the list of known hosts. executing program [ 480.297486] IPVS: Creating netns size=2552 id=1 executing program INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "2" 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 [ 602.426185] INFO: task syz-executor223:3917 blocked for more than 120 seconds. [ 602.433579] Not tainted 4.4.137-ga2e2217 #61 [ 602.439041] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 602.447028] syz-executor223 D ffff8800acd0fa80 27392 3917 3916 0x00000000 [ 602.454532] ffff8800acd0fa80 0000000000000246 0000000000000296 0000000041b58ab3 [ 602.462551] ffffffff841e1a00 ffff8801db21fdb8 ffff8801db21fde0 ffff8801db21f4d8 [ 602.470588] ffff8801db21f4c0 ffff8801d7d63000 ffff8801d7d66000 0000000000000000 [ 602.478671] Call Trace: [ 602.481325] [] schedule+0x7a/0x1b0 [ 602.486574] [] blk_mq_freeze_queue_wait+0x120/0x240 [ 602.493243] [] ? blk_mq_tags_cpumask+0x20/0x20 [ 602.499585] [] ? percpu_ref_kill_and_confirm+0xff/0x300 [ 602.506626] [] ? prepare_to_wait_event+0x430/0x430 [ 602.513178] [] blk_mq_freeze_queue+0x1d/0x20 [ 602.519340] [] lo_ioctl+0x722/0x1ad0 [ 602.524723] [] ? loop_probe+0x180/0x180 [ 602.530393] [] blkdev_ioctl+0x7b8/0x19c0 [ 602.536111] [] ? blkpg_ioctl+0x900/0x900 [ 602.541818] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 602.548860] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 602.555708] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 602.562714] [] ? debug_check_no_obj_freed+0x2ec/0x940 [ 602.569628] [] ? quarantine_put+0xda/0x180 [ 602.575494] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 602.582368] [] ? check_preemption_disabled+0x3b/0x170 [ 602.589264] [] block_ioctl+0xde/0x120 [ 602.594711] [] ? blkdev_read_iter+0x170/0x170 [ 602.600942] [] do_vfs_ioctl+0x63f/0xf40 [ 602.606597] [] ? kmem_cache_free+0x2b4/0x340 [ 602.612649] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 602.618902] [] ? putname+0xe0/0x110 [ 602.624165] [] ? do_sys_open+0x21c/0x610 [ 602.629900] [] ? filp_open+0x70/0x70 [ 602.635258] [] ? vfs_writev+0x83/0xb0 [ 602.640792] [] ? security_file_ioctl+0x8f/0xc0 [ 602.647046] [] SyS_ioctl+0x8f/0xc0 [ 602.652224] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 602.658919] 1 lock held by syz-executor223/3917: [ 602.664224] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1ad0 [ 602.673741] Sending NMI to all CPUs: [ 602.678818] NMI backtrace for cpu 0 [ 602.682437] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.137-ga2e2217 #61 [ 602.689463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.698825] task: ffffffff84417840 task.stack: ffffffff84400000 [ 602.704856] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 602.713476] RSP: 0018:ffffffff84407dc8 EFLAGS: 00000246 [ 602.718946] RAX: 0000000000000007 RBX: ffffffff84a05fa8 RCX: 0000000000000000 [ 602.726240] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8441811c [ 602.733511] RBP: ffffffff84407dc8 R08: 0000000000000000 R09: 0000000000000000 [ 602.740825] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 602.748125] R13: 0000000000000000 R14: fffffbfff074890c R15: ffffffff84a05fa8 [ 602.755406] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 602.763684] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 602.769565] CR2: 00007f2e160ca000 CR3: 00000001c95c3000 CR4: 00000000001606f0 [ 602.776849] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 602.784101] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 602.791389] Stack: [ 602.793528] ffffffff84407e00 ffffffff81025da5 ffffffff84408000 0000000000000000 [ 602.801074] 0000000000000000 fffffbfff074890c ffffffff84a05fa8 ffffffff84407e10 [ 602.808611] ffffffff810272f0 ffffffff84407e28 ffffffff8121bc07 dffffc0000000000 [ 602.816149] Call Trace: [ 602.818708] [] default_idle+0x55/0x3c0 [ 602.824217] [] arch_cpu_idle+0x10/0x20 [ 602.829762] [] default_idle_call+0x57/0x70 [ 602.835620] [] cpu_startup_entry+0x6af/0x780 [ 602.841689] [] ? call_cpuidle+0xe0/0xe0 [ 602.847320] [] rest_init+0x188/0x18e [ 602.852669] [] start_kernel+0x6b3/0x6e7 [ 602.858293] [] ? thread_stack_cache_init+0xb/0xb [ 602.864684] [] ? early_idt_handler_array+0x120/0x120 [ 602.871444] [] ? early_idt_handler_array+0x120/0x120 [ 602.878195] [] x86_64_start_reservations+0x29/0x2b [ 602.884750] [] x86_64_start_kernel+0x13f/0x162 [ 602.891000] 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 [ 602.909997] NMI backtrace for cpu 1 [ 602.913601] CPU: 1 PID: 491 Comm: khungtaskd Not tainted 4.4.137-ga2e2217 #61 [ 602.920887] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 602.930244] task: ffff8800bbb5c800 task.stack: ffff8800bb210000 [ 602.936335] RIP: 0010:[] [] flat_send_IPI_mask+0xf6/0x1a0 [ 602.945066] RSP: 0018:ffff8800bb217cc8 EFLAGS: 00000046 [ 602.950514] RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000 [ 602.957777] RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300 [ 602.965023] RBP: ffff8800bb217cf0 R08: 0000000000000001 R09: 0000000000000000 [ 602.972293] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 [ 602.979559] R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f7a0 [ 602.986835] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 602.995047] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 603.000933] CR2: 00007f2e160ca000 CR3: 00000001c95c3000 CR4: 00000000001606f0 [ 603.008208] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 603.015455] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 603.022725] Stack: [ 603.024846] ffffffff8446f7a0 ffffffff84a18ee0 0000000000000007 fffffbfff0942c8c [ 603.032393] 0000000000000040 ffff8800bb217d10 ffffffff810b5e71 ffffffff83c0b560 [ 603.039930] 0000000000000003 ffff8800bb217d68 ffffffff81e19e83 ffffffff8140dd6f [ 603.047478] Call Trace: [ 603.050037] [] nmi_raise_cpu_backtrace+0x61/0x80 [ 603.056443] [] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad [ 603.063947] [] ? print_lock+0x9f/0xa2 [ 603.069406] [] ? irq_force_complete_move+0x350/0x350 [ 603.076153] [] arch_trigger_all_cpu_backtrace+0x14/0x20 [ 603.083139] [] watchdog.cold.1+0xd3/0xee [ 603.088848] [] ? watchdog+0xb0/0x9a0 [ 603.094185] [] kthread+0x268/0x300 [ 603.099372] [] ? reset_hung_task_detector+0x20/0x20 [ 603.106028] [] ? kthread_create_on_node+0x400/0x400 [ 603.112668] [] ? kthread_create_on_node+0x400/0x400 [ 603.119348] [] ret_from_fork+0x55/0x80 [ 603.124861] [] ? kthread_create_on_node+0x400/0x400 [ 603.131539] 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 [ 603.150711] Kernel panic - not syncing: hung_task: blocked tasks [ 603.156883] CPU: 0 PID: 491 Comm: khungtaskd Not tainted 4.4.137-ga2e2217 #61 [ 603.164126] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 603.173453] 0000000000000000 83536787a4a4a417 ffff8800bb217cb8 ffffffff81e0ee0d [ 603.181474] ffffffff83a837e0 0000000000000003 7fffffffffffffff 00000000003fff90 [ 603.189451] dffffc0000000000 ffff8800bb217d78 ffffffff8140a184 0000000041b58ab3 [ 603.197429] Call Trace: [ 603.199996] [] dump_stack+0xc1/0x124 [ 603.205347] [] panic+0x19e/0x38d [ 603.210338] [] ? add_taint.cold.4+0x16/0x16 [ 603.216281] [] ? nmi_trigger_all_cpu_backtrace+0x3e6/0x488 [ 603.223525] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 603.230769] [] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 [ 603.238013] [] watchdog.cold.1+0xe4/0xee [ 603.243713] [] ? watchdog+0xb0/0x9a0 [ 603.249050] [] kthread+0x268/0x300 [ 603.254213] [] ? reset_hung_task_detector+0x20/0x20 [ 603.260851] [] ? kthread_create_on_node+0x400/0x400 [ 603.267490] [] ? kthread_create_on_node+0x400/0x400 [ 603.274128] [] ret_from_fork+0x55/0x80 [ 603.279633] [] ? kthread_create_on_node+0x400/0x400 [ 603.286838] Dumping ftrace buffer: [ 603.290431] (ftrace buffer empty) [ 603.294113] Kernel Offset: disabled [ 603.297726] Rebooting in 86400 seconds..