2017/08/23 02:20:06 fuzzer started 2017/08/23 02:20:06 dialing manager at 10.0.2.10:34489 syzkaller login: [ 36.079024] watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [swapper/3:0] [ 36.080371] Modules linked in: [ 36.080960] irq event stamp: 20466345 [ 36.081656] hardirqs last enabled at (20466344): [] _raw_spin_unlock_irq+0x27/0x70 [ 36.083340] hardirqs last disabled at (20466345): [] apic_timer_interrupt+0x98/0xb0 [ 36.085022] softirqs last enabled at (105964): [] _local_bh_enable+0x1c/0x30 [ 36.086623] softirqs last disabled at (105965): [] irq_exit+0x1d3/0x210 [ 36.088112] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 4.13.0-rc6-next-20170822+ #6 [ 36.089499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.090971] task: ffff88006dad4080 task.stack: ffff88006dad8000 [ 36.092065] RIP: 0010:lock_acquire+0x256/0x580 [ 36.092889] RSP: 0018:ffff88006df077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.094286] RAX: dffffc0000000000 RBX: ffff88006dad4080 RCX: 0000000000000000 [ 36.095586] RDX: 1ffffffff0b5915d RSI: ffffffff84d9e4a6 RDI: 0000000000000286 [ 36.097351] RBP: ffff88006df078b0 R08: ffff88006df07230 R09: ffff88006df07228 [ 36.098428] R10: ffff88006df071a0 R11: 1ffff1000db5aaa3 R12: 1ffff1000dbe0efd [ 36.099012] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 36.099625] FS: 0000000000000000(0000) GS:ffff88006df00000(0000) knlGS:0000000000000000 [ 36.100313] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.100791] CR2: 00007ffab1c8a1e7 CR3: 000000003df89000 CR4: 00000000000006e0 [ 36.101396] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.101986] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.102591] Call Trace: [ 36.102809] [ 36.103002] ? lock_release+0xd70/0xd70 [ 36.103357] ? __lock_is_held+0xbc/0x140 [ 36.103712] call_timer_fn+0x20a/0x850 [ 36.104038] ? call_timer_fn+0x1e0/0x850 [ 36.104403] ? destroy_worker+0x580/0x580 [ 36.104752] ? init_timer_key+0x3b0/0x3b0 [ 36.105101] ? lock_downgrade+0x990/0x990 [ 36.105482] ? __run_timers+0x809/0xb90 [ 36.105818] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.106220] ? do_raw_spin_trylock+0x190/0x190 [ 36.106629] ? __lock_is_held+0xbc/0x140 [ 36.106974] ? destroy_worker+0x580/0x580 [ 36.107400] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.107817] ? destroy_worker+0x580/0x580 [ 36.108165] __run_timers+0x7fd/0xb90 [ 36.108518] ? msleep_interruptible+0x170/0x170 [ 36.108907] ? lock_acquire+0x1d5/0x580 [ 36.109240] ? __hrtimer_run_queues+0x385/0xe10 [ 36.109661] ? find_held_lock+0x39/0x1d0 [ 36.110014] ? lock_downgrade+0x990/0x990 [ 36.110389] ? lock_acquire+0x1d5/0x580 [ 36.110723] ? clockevents_program_event+0x163/0x2e0 [ 36.111163] ? pvclock_read_flags+0x160/0x160 [ 36.111557] ? rcu_pm_notify+0xc0/0xc0 [ 36.111895] run_timer_softirq+0x67/0x80 [ 36.112235] __do_softirq+0x2bb/0xbd0 [ 36.112582] ? __softirqentry_text_start+0x8/0x8 [ 36.112966] ? native_apic_msr_write+0x5c/0x80 [ 36.113364] ? lapic_next_event+0x5a/0x90 [ 36.113706] ? clockevents_program_event+0x108/0x2e0 [ 36.114123] ? tick_program_event+0x7f/0xd0 [ 36.114496] ? hrtimer_interrupt+0x489/0x5f0 [ 36.114872] irq_exit+0x1d3/0x210 [ 36.115156] smp_apic_timer_interrupt+0x76/0xa0 [ 36.115559] apic_timer_interrupt+0x9d/0xb0 [ 36.115914] [ 36.116100] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.117944] RSP: 0018:ffff88006dadfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.118567] RAX: dffffc0000000000 RBX: 1ffff1000db5bfb9 RCX: 0000000000000000 [ 36.119145] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.119768] RBP: ffff88006dadfdb0 R08: ffffffff85804a98 R09: 0000000000000000 [ 36.120347] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.120915] R13: ffff88006dadfe68 R14: 0000000000000000 R15: ffff88006dad4080 [ 36.121510] default_idle+0xbf/0x460 [ 36.121814] ? __sched_text_end+0x4/0x4 [ 36.122151] ? tick_nohz_idle_enter+0xde/0x160 [ 36.122533] arch_cpu_idle+0xa/0x10 [ 36.122833] default_idle_call+0x36/0x90 [ 36.123169] do_idle+0x256/0x3b0 [ 36.123455] cpu_startup_entry+0x18/0x20 [ 36.123791] start_secondary+0x277/0x310 [ 36.124117] secondary_startup_64+0xa5/0xa5 [ 36.124471] Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 95 02 00 00 48 83 3d 21 8f 57 04 00 0f 84 d1 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 [ 36.126309] Kernel panic - not syncing: softlockup: hung tasks [ 36.126773] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G L 4.13.0-rc6-next-20170822+ #6 [ 36.127463] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.128101] Call Trace: [ 36.128306] [ 36.128480] dump_stack+0x194/0x257 [ 36.128773] ? arch_local_irq_restore+0x53/0x53 [ 36.129155] ? vprintk_default+0x28/0x30 [ 36.129482] ? vprintk_func+0x5e/0xc0 [ 36.129792] panic+0x1e4/0x41c [ 36.130050] ? refcount_error_report+0x214/0x214 [ 36.130439] watchdog_timer_fn+0x401/0x410 [ 36.130777] ? watchdog_park_threads+0x240/0x240 [ 36.131163] __hrtimer_run_queues+0x349/0xe10 [ 36.131524] ? watchdog_park_threads+0x240/0x240 [ 36.131905] ? hrtimer_cancel+0x40/0x40 [ 36.132225] ? __save_stack_trace+0x91/0xd0 [ 36.132569] ? pvclock_read_flags+0x160/0x160 [ 36.132923] ? detach_if_pending+0x250/0x610 [ 36.133284] ? kvm_clock_get_cycles+0x25/0x30 [ 36.133637] ? ktime_get_update_offsets_now+0x34a/0x520 [ 36.134067] ? do_timer+0x50/0x50 [ 36.134349] ? find_held_lock+0x39/0x1d0 [ 36.134678] hrtimer_interrupt+0x1d4/0x5f0 [ 36.135033] local_apic_timer_interrupt+0x6b/0xa0 [ 36.135413] smp_apic_timer_interrupt+0x71/0xa0 [ 36.135786] apic_timer_interrupt+0x9d/0xb0 [ 36.136128] RIP: 0010:lock_acquire+0x256/0x580 [ 36.136488] RSP: 0018:ffff88006df077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.137091] RAX: dffffc0000000000 RBX: ffff88006dad4080 RCX: 0000000000000000 [ 36.139098] RDX: 1ffffffff0b5915d RSI: ffffffff84d9e4a6 RDI: 0000000000000286 [ 36.139672] RBP: ffff88006df078b0 R08: ffff88006df07230 R09: ffff88006df07228 [ 36.140244] R10: ffff88006df071a0 R11: 1ffff1000db5aaa3 R12: 1ffff1000dbe0efd [ 36.140812] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 36.141400] ? smp_apic_timer_interrupt+0x76/0xa0 [ 36.141797] ? lock_release+0xd70/0xd70 [ 36.142115] ? __lock_is_held+0xbc/0x140 [ 36.142452] call_timer_fn+0x20a/0x850 [ 36.142760] ? call_timer_fn+0x1e0/0x850 [ 36.143087] ? destroy_worker+0x580/0x580 [ 36.143415] ? init_timer_key+0x3b0/0x3b0 [ 36.143744] ? lock_downgrade+0x990/0x990 [ 36.144083] ? __run_timers+0x809/0xb90 [ 36.144412] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.144794] ? do_raw_spin_trylock+0x190/0x190 [ 36.145161] ? __lock_is_held+0xbc/0x140 [ 36.145492] ? destroy_worker+0x580/0x580 [ 36.145822] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.146221] ? destroy_worker+0x580/0x580 [ 36.146548] __run_timers+0x7fd/0xb90 [ 36.146862] ? msleep_interruptible+0x170/0x170 [ 36.147230] ? lock_acquire+0x1d5/0x580 [ 36.147548] ? __hrtimer_run_queues+0x385/0xe10 [ 36.147926] ? find_held_lock+0x39/0x1d0 [ 36.148261] ? lock_downgrade+0x990/0x990 [ 36.148599] ? lock_acquire+0x1d5/0x580 [ 36.148915] ? clockevents_program_event+0x163/0x2e0 [ 36.149335] ? pvclock_read_flags+0x160/0x160 [ 36.149693] ? rcu_pm_notify+0xc0/0xc0 [ 36.150015] run_timer_softirq+0x67/0x80 [ 36.150334] __do_softirq+0x2bb/0xbd0 [ 36.150648] ? __softirqentry_text_start+0x8/0x8 [ 36.151027] ? native_apic_msr_write+0x5c/0x80 [ 36.151389] ? lapic_next_event+0x5a/0x90 [ 36.151720] ? clockevents_program_event+0x108/0x2e0 [ 36.152129] ? tick_program_event+0x7f/0xd0 [ 36.152472] ? hrtimer_interrupt+0x489/0x5f0 [ 36.152839] irq_exit+0x1d3/0x210 [ 36.153113] smp_apic_timer_interrupt+0x76/0xa0 [ 36.153489] apic_timer_interrupt+0x9d/0xb0 [ 36.153835] [ 36.154020] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.154392] RSP: 0018:ffff88006dadfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.155011] RAX: dffffc0000000000 RBX: 1ffff1000db5bfb9 RCX: 0000000000000000 [ 36.155588] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.156165] RBP: ffff88006dadfdb0 R08: ffffffff85804a98 R09: 0000000000000000 [ 36.156741] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.157323] R13: ffff88006dadfe68 R14: 0000000000000000 R15: ffff88006dad4080 [ 36.157920] default_idle+0xbf/0x460 [ 36.158223] ? __sched_text_end+0x4/0x4 [ 36.158558] ? tick_nohz_idle_enter+0xde/0x160 [ 36.160094] arch_cpu_idle+0xa/0x10 [ 36.160382] default_idle_call+0x36/0x90 [ 36.160706] do_idle+0x256/0x3b0 [ 36.160979] cpu_startup_entry+0x18/0x20 [ 36.161315] start_secondary+0x277/0x310 [ 36.161639] secondary_startup_64+0xa5/0xa5 [ 36.162121] Dumping ftrace buffer: [ 36.162465] (ftrace buffer empty) [ 36.162775] Kernel Offset: disabled [ 36.163089] Rebooting in 86400 seconds..