2017/08/22 16:48:21 fuzzer started 2017/08/22 16:48:21 dialing manager at 10.0.2.10:34489 syzkaller login: [ 36.070204] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [swapper/2:0] [ 36.070732] Modules linked in: [ 36.070968] irq event stamp: 23253957 [ 36.071235] hardirqs last enabled at (23253956): [] _raw_spin_unlock_irq+0x27/0x70 [ 36.071875] hardirqs last disabled at (23253957): [] apic_timer_interrupt+0x98/0xb0 [ 36.072505] softirqs last enabled at (103096): [] _local_bh_enable+0x1c/0x30 [ 36.073112] softirqs last disabled at (103097): [] irq_exit+0x1d3/0x210 [ 36.073680] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.13.0-rc6-next-20170822+ #6 [ 36.074208] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.074773] task: ffff88006dac6040 task.stack: ffff88006dac8000 [ 36.075197] RIP: 0010:lock_acquire+0x256/0x580 [ 36.075501] RSP: 0018:ffff88006de077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.076037] RAX: dffffc0000000000 RBX: ffff88006dac6040 RCX: 0000000000000000 [ 36.076525] RDX: 1ffffffff0b5915d RSI: ffffffff84d9e4a6 RDI: 0000000000000286 [ 36.077028] RBP: ffff88006de078b0 R08: ffff88006de07230 R09: ffff88006de07228 [ 36.077513] R10: ffff88006de071a0 R11: 1ffff1000db58e9b R12: 1ffff1000dbc0efd [ 36.078015] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 36.078512] FS: 0000000000000000(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 [ 36.079076] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.079473] CR2: 00007ff19cf341b0 CR3: 00000000680c0000 CR4: 00000000000006e0 [ 36.079977] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.080468] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.080961] Call Trace: [ 36.081140] [ 36.081297] ? ktime_get_resolution_ns+0x300/0x300 [ 36.081636] ? lock_release+0xd70/0xd70 [ 36.081925] ? __lock_is_held+0xbc/0x140 [ 36.082217] call_timer_fn+0x20a/0x850 [ 36.082487] ? call_timer_fn+0x1e0/0x850 [ 36.082772] ? destroy_worker+0x580/0x580 [ 36.083065] ? init_timer_key+0x3b0/0x3b0 [ 36.083351] ? lock_downgrade+0x990/0x990 [ 36.083637] ? __run_timers+0x809/0xb90 [ 36.083937] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.084269] ? do_raw_spin_trylock+0x190/0x190 [ 36.084581] ? __lock_is_held+0xbc/0x140 [ 36.084876] ? destroy_worker+0x580/0x580 [ 36.085189] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.085656] ? destroy_worker+0x580/0x580 [ 36.086046] __run_timers+0x7fd/0xb90 [ 36.086633] ? msleep_interruptible+0x170/0x170 [ 36.086994] ? lock_acquire+0x1d5/0x580 [ 36.087270] ? __hrtimer_run_queues+0x385/0xe10 [ 36.087598] ? find_held_lock+0x39/0x1d0 [ 36.087893] ? lock_downgrade+0x990/0x990 [ 36.088184] ? lock_acquire+0x1d5/0x580 [ 36.088462] ? clockevents_program_event+0x163/0x2e0 [ 36.088830] ? pvclock_read_flags+0x160/0x160 [ 36.089136] ? rcu_pm_notify+0xc0/0xc0 [ 36.089413] run_timer_softirq+0x67/0x80 [ 36.089696] __do_softirq+0x2bb/0xbd0 [ 36.089973] ? __softirqentry_text_start+0x8/0x8 [ 36.090302] ? native_apic_msr_write+0x5c/0x80 [ 36.090627] ? lapic_next_event+0x5a/0x90 [ 36.090921] ? clockevents_program_event+0x108/0x2e0 [ 36.091271] ? tick_program_event+0x7f/0xd0 [ 36.091573] ? hrtimer_interrupt+0x489/0x5f0 [ 36.091896] irq_exit+0x1d3/0x210 [ 36.092131] smp_apic_timer_interrupt+0x76/0xa0 [ 36.092453] apic_timer_interrupt+0x9d/0xb0 [ 36.092763] [ 36.092934] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.093247] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.093772] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.094276] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.094774] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.095273] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.095761] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.096274] default_idle+0xbf/0x460 [ 36.096536] ? __sched_text_end+0x4/0x4 [ 36.096823] ? tick_nohz_idle_enter+0xde/0x160 [ 36.097141] arch_cpu_idle+0xa/0x10 [ 36.097392] default_idle_call+0x36/0x90 [ 36.097676] do_idle+0x256/0x3b0 [ 36.097922] cpu_startup_entry+0x18/0x20 [ 36.098206] start_secondary+0x277/0x310 [ 36.098486] secondary_startup_64+0xa5/0xa5 [ 36.098803] 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 [ 36.100372] Kernel panic - not syncing: softlockup: hung tasks [ 36.100785] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G L 4.13.0-rc6-next-20170822+ #6 [ 36.101389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.101952] Call Trace: [ 36.102127] [ 36.102284] dump_stack+0x194/0x257 [ 36.102532] ? arch_local_irq_restore+0x53/0x53 [ 36.102858] ? vprintk_default+0x28/0x30 [ 36.103135] ? vprintk_func+0x5e/0xc0 [ 36.103402] panic+0x1e4/0x41c [ 36.103630] ? refcount_error_report+0x214/0x214 [ 36.103976] watchdog_timer_fn+0x401/0x410 [ 36.104268] ? watchdog_park_threads+0x240/0x240 [ 36.104604] __hrtimer_run_queues+0x349/0xe10 [ 36.104923] ? watchdog_park_threads+0x240/0x240 [ 36.105251] ? hrtimer_cancel+0x40/0x40 [ 36.105521] ? __save_stack_trace+0x91/0xd0 [ 36.105827] ? pvclock_read_flags+0x160/0x160 [ 36.106138] ? detach_if_pending+0x250/0x610 [ 36.106450] ? kvm_clock_get_cycles+0x25/0x30 [ 36.106758] ? ktime_get_update_offsets_now+0x34a/0x520 [ 36.107276] ? do_timer+0x50/0x50 [ 36.107608] ? find_held_lock+0x39/0x1d0 [ 36.108198] hrtimer_interrupt+0x1d4/0x5f0 [ 36.108616] local_apic_timer_interrupt+0x6b/0xa0 [ 36.108969] smp_apic_timer_interrupt+0x71/0xa0 [ 36.109287] apic_timer_interrupt+0x9d/0xb0 [ 36.109584] RIP: 0010:lock_acquire+0x256/0x580 [ 36.109897] RSP: 0018:ffff88006de077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.110420] RAX: dffffc0000000000 RBX: ffff88006dac6040 RCX: 0000000000000000 [ 36.110924] RDX: 1ffffffff0b5915d RSI: ffffffff84d9e4a6 RDI: 0000000000000286 [ 36.111422] RBP: ffff88006de078b0 R08: ffff88006de07230 R09: ffff88006de07228 [ 36.111914] R10: ffff88006de071a0 R11: 1ffff1000db58e9b R12: 1ffff1000dbc0efd [ 36.112409] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 36.112913] ? smp_apic_timer_interrupt+0x76/0xa0 [ 36.113249] ? ktime_get_resolution_ns+0x300/0x300 [ 36.113591] ? lock_release+0xd70/0xd70 [ 36.113872] ? __lock_is_held+0xbc/0x140 [ 36.114156] call_timer_fn+0x20a/0x850 [ 36.114433] ? call_timer_fn+0x1e0/0x850 [ 36.114720] ? destroy_worker+0x580/0x580 [ 36.115008] ? init_timer_key+0x3b0/0x3b0 [ 36.115285] ? lock_downgrade+0x990/0x990 [ 36.115578] ? __run_timers+0x809/0xb90 [ 36.115861] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.116190] ? do_raw_spin_trylock+0x190/0x190 [ 36.116512] ? __lock_is_held+0xbc/0x140 [ 36.116800] ? destroy_worker+0x580/0x580 [ 36.117082] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.117437] ? destroy_worker+0x580/0x580 [ 36.117723] __run_timers+0x7fd/0xb90 [ 36.117998] ? msleep_interruptible+0x170/0x170 [ 36.118320] ? lock_acquire+0x1d5/0x580 [ 36.118601] ? __hrtimer_run_queues+0x385/0xe10 [ 36.118933] ? find_held_lock+0x39/0x1d0 [ 36.119215] ? lock_downgrade+0x990/0x990 [ 36.119509] ? lock_acquire+0x1d5/0x580 [ 36.119784] ? clockevents_program_event+0x163/0x2e0 [ 36.120142] ? pvclock_read_flags+0x160/0x160 [ 36.120455] ? rcu_pm_notify+0xc0/0xc0 [ 36.120728] run_timer_softirq+0x67/0x80 [ 36.121015] __do_softirq+0x2bb/0xbd0 [ 36.121285] ? __softirqentry_text_start+0x8/0x8 [ 36.121614] ? native_apic_msr_write+0x5c/0x80 [ 36.121934] ? lapic_next_event+0x5a/0x90 [ 36.122220] ? clockevents_program_event+0x108/0x2e0 [ 36.122577] ? tick_program_event+0x7f/0xd0 [ 36.122885] ? hrtimer_interrupt+0x489/0x5f0 [ 36.123202] irq_exit+0x1d3/0x210 [ 36.123436] smp_apic_timer_interrupt+0x76/0xa0 [ 36.123763] apic_timer_interrupt+0x9d/0xb0 [ 36.124063] [ 36.124223] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.124542] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.125069] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.125566] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.126060] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.126559] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.127048] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.127557] default_idle+0xbf/0x460 [ 36.127820] ? __sched_text_end+0x4/0x4 [ 36.128162] ? tick_nohz_idle_enter+0xde/0x160 [ 36.128795] arch_cpu_idle+0xa/0x10 [ 36.129140] default_idle_call+0x36/0x90 [ 36.129525] do_idle+0x256/0x3b0 [ 36.129856] cpu_startup_entry+0x18/0x20 [ 36.130210] start_secondary+0x277/0x310 [ 36.130494] secondary_startup_64+0xa5/0xa5 [ 36.130927] Dumping ftrace buffer: [ 36.131214] (ftrace buffer empty) [ 36.131464] Kernel Offset: disabled [ 36.131717] Rebooting in 86400 seconds..