2017/08/23 02:00:02 fuzzer started 2017/08/23 02:00:02 dialing manager at 10.0.2.10:34489 syzkaller login: [ 36.070052] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [swapper/2:0] [ 36.071057] Modules linked in: [ 36.071496] irq event stamp: 24640287 [ 36.072011] hardirqs last enabled at (24640286): [] _raw_spin_unlock_irq+0x27/0x70 [ 36.073280] hardirqs last disabled at (24640287): [] apic_timer_interrupt+0x98/0xb0 [ 36.074541] softirqs last enabled at (102388): [] _local_bh_enable+0x1c/0x30 [ 36.075723] softirqs last disabled at (102389): [] irq_exit+0x1d3/0x210 [ 36.076837] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.13.0-rc6-next-20170822+ #6 [ 36.077873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.078988] task: ffff88006dac6040 task.stack: ffff88006dac8000 [ 36.079812] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.080522] RSP: 0018:ffff88006de077a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.081572] RAX: dffffc0000000000 RBX: ffff88006de25200 RCX: 0000000000000002 [ 36.082550] RDX: 1ffffffff0b5915f RSI: 1ffff1000db58d1f RDI: ffffffff85ac8af8 [ 36.083529] RBP: ffff88006de077a8 R08: ffff88006de06e20 R09: 0000000000000000 [ 36.084501] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de07850 [ 36.085483] R13: ffff88006de2526c R14: ffff88006da6d500 R15: dffffc0000000000 [ 36.086717] FS: 0000000000000000(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 [ 36.087832] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.088623] CR2: 00007fe4eca961b0 CR3: 0000000066e9a000 CR4: 00000000000006e0 [ 36.089621] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.090599] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.091573] Call Trace: [ 36.091944] [ 36.092254] idle_worker_timeout+0x2e3/0x400 [ 36.092861] ? destroy_worker+0x580/0x580 [ 36.093435] ? __lock_is_held+0xbc/0x140 [ 36.093998] call_timer_fn+0x246/0x850 [ 36.094534] ? destroy_worker+0x580/0x580 [ 36.095103] ? init_timer_key+0x3b0/0x3b0 [ 36.095658] ? lock_downgrade+0x990/0x990 [ 36.096226] ? sched_set_stop_task+0x2a0/0x2a0 [ 36.096838] ? update_max_interval+0x60/0x60 [ 36.097450] ? __run_timers+0x809/0xb90 [ 36.097982] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.098637] ? do_raw_spin_trylock+0x190/0x190 [ 36.099264] ? __lock_is_held+0xbc/0x140 [ 36.099813] ? destroy_worker+0x580/0x580 [ 36.100382] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.101066] ? destroy_worker+0x580/0x580 [ 36.101557] __run_timers+0x7fd/0xb90 [ 36.101905] ? msleep_interruptible+0x170/0x170 [ 36.102320] ? lock_acquire+0x1d5/0x580 [ 36.102674] ? __hrtimer_run_queues+0x385/0xe10 [ 36.103091] ? find_held_lock+0x39/0x1d0 [ 36.103462] ? lock_downgrade+0x990/0x990 [ 36.103835] ? lock_acquire+0x1d5/0x580 [ 36.104190] ? clockevents_program_event+0x163/0x2e0 [ 36.104650] ? pvclock_read_flags+0x160/0x160 [ 36.105051] ? rcu_pm_notify+0xc0/0xc0 [ 36.105414] run_timer_softirq+0x67/0x80 [ 36.105770] __do_softirq+0x2bb/0xbd0 [ 36.106119] ? __softirqentry_text_start+0x8/0x8 [ 36.106541] ? native_apic_msr_write+0x5c/0x80 [ 36.106948] ? lapic_next_event+0x5a/0x90 [ 36.107321] ? clockevents_program_event+0x108/0x2e0 [ 36.108024] ? tick_program_event+0x7f/0xd0 [ 36.108417] ? hrtimer_interrupt+0x489/0x5f0 [ 36.108822] irq_exit+0x1d3/0x210 [ 36.109130] smp_apic_timer_interrupt+0x76/0xa0 [ 36.109553] apic_timer_interrupt+0x9d/0xb0 [ 36.109933] [ 36.110140] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.110545] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.111220] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.111846] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.112478] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.113106] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.113719] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.114357] default_idle+0xbf/0x460 [ 36.114691] ? __sched_text_end+0x4/0x4 [ 36.115060] ? tick_nohz_idle_enter+0xde/0x160 [ 36.115474] arch_cpu_idle+0xa/0x10 [ 36.115798] default_idle_call+0x36/0x90 [ 36.116158] do_idle+0x256/0x3b0 [ 36.116459] cpu_startup_entry+0x18/0x20 [ 36.116822] start_secondary+0x277/0x310 [ 36.117186] secondary_startup_64+0xa5/0xa5 [ 36.117583] Code: 8a ac 85 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 1d 48 83 3d 0b 10 d3 00 00 74 11 fb 66 0f 1f 44 00 00 <65> ff 0d d3 e9 27 7b 5b 5d c3 0f 0b e8 b9 c8 c8 fc eb dc 0f 1f [ 36.119496] Kernel panic - not syncing: softlockup: hung tasks [ 36.120023] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G L 4.13.0-rc6-next-20170822+ #6 [ 36.120802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.121517] Call Trace: [ 36.121748] [ 36.121944] dump_stack+0x194/0x257 [ 36.122269] ? arch_local_irq_restore+0x53/0x53 [ 36.122681] ? vprintk_default+0x28/0x30 [ 36.123045] ? vprintk_func+0x5e/0xc0 [ 36.123392] panic+0x1e4/0x41c [ 36.123675] ? refcount_error_report+0x214/0x214 [ 36.124101] watchdog_timer_fn+0x401/0x410 [ 36.124472] ? watchdog_park_threads+0x240/0x240 [ 36.124891] __hrtimer_run_queues+0x349/0xe10 [ 36.125287] ? watchdog_park_threads+0x240/0x240 [ 36.125706] ? hrtimer_cancel+0x40/0x40 [ 36.126065] ? pvclock_read_flags+0x160/0x160 [ 36.126470] ? kvm_clock_get_cycles+0x25/0x30 [ 36.126860] ? ktime_get_update_offsets_now+0x34a/0x520 [ 36.127338] ? do_timer+0x50/0x50 [ 36.127649] ? trace_hardirqs_off+0xd/0x10 [ 36.128039] hrtimer_interrupt+0x1d4/0x5f0 [ 36.128434] local_apic_timer_interrupt+0x6b/0xa0 [ 36.128861] smp_apic_timer_interrupt+0x71/0xa0 [ 36.129530] apic_timer_interrupt+0x9d/0xb0 [ 36.129911] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.130382] RSP: 0018:ffff88006de077a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.131059] RAX: dffffc0000000000 RBX: ffff88006de25200 RCX: 0000000000000002 [ 36.131693] RDX: 1ffffffff0b5915f RSI: 1ffff1000db58d1f RDI: ffffffff85ac8af8 [ 36.132323] RBP: ffff88006de077a8 R08: ffff88006de06e20 R09: 0000000000000000 [ 36.132946] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de07850 [ 36.133574] R13: ffff88006de2526c R14: ffff88006da6d500 R15: dffffc0000000000 [ 36.134202] idle_worker_timeout+0x2e3/0x400 [ 36.134590] ? destroy_worker+0x580/0x580 [ 36.134956] ? __lock_is_held+0xbc/0x140 [ 36.135328] call_timer_fn+0x246/0x850 [ 36.135670] ? destroy_worker+0x580/0x580 [ 36.136033] ? init_timer_key+0x3b0/0x3b0 [ 36.136398] ? lock_downgrade+0x990/0x990 [ 36.136757] ? sched_set_stop_task+0x2a0/0x2a0 [ 36.137153] ? update_max_interval+0x60/0x60 [ 36.137578] ? __run_timers+0x809/0xb90 [ 36.137917] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.138335] ? do_raw_spin_trylock+0x190/0x190 [ 36.138734] ? __lock_is_held+0xbc/0x140 [ 36.139092] ? destroy_worker+0x580/0x580 [ 36.139458] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.139893] ? destroy_worker+0x580/0x580 [ 36.140254] __run_timers+0x7fd/0xb90 [ 36.140593] ? msleep_interruptible+0x170/0x170 [ 36.140997] ? lock_acquire+0x1d5/0x580 [ 36.141348] ? __hrtimer_run_queues+0x385/0xe10 [ 36.141758] ? find_held_lock+0x39/0x1d0 [ 36.142114] ? lock_downgrade+0x990/0x990 [ 36.142473] ? lock_acquire+0x1d5/0x580 [ 36.142811] ? clockevents_program_event+0x163/0x2e0 [ 36.143255] ? pvclock_read_flags+0x160/0x160 [ 36.143642] ? rcu_pm_notify+0xc0/0xc0 [ 36.143990] run_timer_softirq+0x67/0x80 [ 36.144343] __do_softirq+0x2bb/0xbd0 [ 36.144680] ? __softirqentry_text_start+0x8/0x8 [ 36.145091] ? native_apic_msr_write+0x5c/0x80 [ 36.145491] ? lapic_next_event+0x5a/0x90 [ 36.145854] ? clockevents_program_event+0x108/0x2e0 [ 36.146305] ? tick_program_event+0x7f/0xd0 [ 36.146683] ? hrtimer_interrupt+0x489/0x5f0 [ 36.147085] irq_exit+0x1d3/0x210 [ 36.147391] smp_apic_timer_interrupt+0x76/0xa0 [ 36.147794] apic_timer_interrupt+0x9d/0xb0 [ 36.148171] [ 36.148373] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.148774] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.149435] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.150060] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.150935] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.151561] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.152185] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.152823] default_idle+0xbf/0x460 [ 36.153147] ? __sched_text_end+0x4/0x4 [ 36.153507] ? tick_nohz_idle_enter+0xde/0x160 [ 36.153908] arch_cpu_idle+0xa/0x10 [ 36.154223] default_idle_call+0x36/0x90 [ 36.154577] do_idle+0x256/0x3b0 [ 36.154877] cpu_startup_entry+0x18/0x20 [ 36.155233] start_secondary+0x277/0x310 [ 36.155588] secondary_startup_64+0xa5/0xa5 [ 36.156112] Dumping ftrace buffer: [ 36.156470] (ftrace buffer empty) [ 36.156791] Kernel Offset: disabled [ 36.157117] Rebooting in 86400 seconds..