2017/08/22 13:26:49 fuzzer started 2017/08/22 13:26:49 dialing manager at 10.0.2.10:34489 syzkaller login: [ 36.068062] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [swapper/2:0] [ 36.068689] Modules linked in: [ 36.068999] irq event stamp: 23156729 [ 36.069371] hardirqs last enabled at (23156728): [] _raw_spin_unlock_irq+0x27/0x70 [ 36.070218] hardirqs last disabled at (23156729): [] apic_timer_interrupt+0x98/0xb0 [ 36.071072] softirqs last enabled at (110570): [] _local_bh_enable+0x1c/0x30 [ 36.071828] softirqs last disabled at (110571): [] irq_exit+0x1d3/0x210 [ 36.072574] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.13.0-rc6-next-20170822+ #6 [ 36.073289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.073986] task: ffff88006dac6040 task.stack: ffff88006dac8000 [ 36.074531] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.074981] RSP: 0018:ffff88006de07a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.075662] RAX: dffffc0000000000 RBX: ffff88006de1c200 RCX: 0000000000000000 [ 36.076338] RDX: 1ffffffff0b5915f RSI: 0000000000000000 RDI: ffffffff85ac8af8 [ 36.076971] RBP: ffff88006de07a98 R08: ffff88006de073f8 R09: 0000000000000000 [ 36.077646] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de25200 [ 36.078319] R13: dffffc0000000000 R14: ffffffff8145b7a0 R15: ffff88006de07d70 [ 36.078944] FS: 0000000000000000(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 [ 36.079659] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.080218] CR2: 00007fc781b9e000 CR3: 000000006b1d5000 CR4: 00000000000006e0 [ 36.080853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.081498] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.082152] Call Trace: [ 36.082361] [ 36.082565] __run_timers+0x7ef/0xb90 [ 36.082926] ? msleep_interruptible+0x170/0x170 [ 36.083628] ? lock_acquire+0x1d5/0x580 [ 36.083994] ? __hrtimer_run_queues+0x385/0xe10 [ 36.084426] ? find_held_lock+0x39/0x1d0 [ 36.084812] ? lock_downgrade+0x990/0x990 [ 36.085216] ? lock_acquire+0x1d5/0x580 [ 36.085550] ? clockevents_program_event+0x163/0x2e0 [ 36.086060] ? pvclock_read_flags+0x160/0x160 [ 36.086471] ? rcu_pm_notify+0xc0/0xc0 [ 36.086836] run_timer_softirq+0x67/0x80 [ 36.087239] __do_softirq+0x2bb/0xbd0 [ 36.087567] ? __softirqentry_text_start+0x8/0x8 [ 36.087994] ? native_apic_msr_write+0x5c/0x80 [ 36.088420] ? lapic_next_event+0x5a/0x90 [ 36.088800] ? clockevents_program_event+0x108/0x2e0 [ 36.089281] ? tick_program_event+0x7f/0xd0 [ 36.089640] ? hrtimer_interrupt+0x489/0x5f0 [ 36.090100] irq_exit+0x1d3/0x210 [ 36.090391] smp_apic_timer_interrupt+0x76/0xa0 [ 36.090808] apic_timer_interrupt+0x9d/0xb0 [ 36.091224] [ 36.091415] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.091830] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.092524] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.093204] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.093825] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.094464] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.095131] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.095741] default_idle+0xbf/0x460 [ 36.096130] ? __sched_text_end+0x4/0x4 [ 36.096475] ? tick_nohz_idle_enter+0xde/0x160 [ 36.096909] arch_cpu_idle+0xa/0x10 [ 36.097271] default_idle_call+0x36/0x90 [ 36.097625] do_idle+0x256/0x3b0 [ 36.097942] cpu_startup_entry+0x18/0x20 [ 36.098320] start_secondary+0x277/0x310 [ 36.098659] secondary_startup_64+0xa5/0xa5 [ 36.099090] 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 [ 36.101136] Kernel panic - not syncing: softlockup: hung tasks [ 36.101616] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G L 4.13.0-rc6-next-20170822+ #6 [ 36.102412] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.103125] Call Trace: [ 36.103336] [ 36.103520] dump_stack+0x194/0x257 [ 36.103858] ? arch_local_irq_restore+0x53/0x53 [ 36.104278] ? vprintk_default+0x28/0x30 [ 36.104974] ? vprintk_func+0x5e/0xc0 [ 36.105346] panic+0x1e4/0x41c [ 36.105616] ? refcount_error_report+0x214/0x214 [ 36.106088] watchdog_timer_fn+0x401/0x410 [ 36.106441] ? watchdog_park_threads+0x240/0x240 [ 36.106875] __hrtimer_run_queues+0x349/0xe10 [ 36.107286] ? watchdog_park_threads+0x240/0x240 [ 36.107681] ? hrtimer_cancel+0x40/0x40 [ 36.108085] ? pvclock_read_flags+0x160/0x160 [ 36.108461] ? lock_downgrade+0x990/0x990 [ 36.108847] ? kvm_clock_get_cycles+0x25/0x30 [ 36.109254] ? ktime_get_update_offsets_now+0x34a/0x520 [ 36.109705] ? do_timer+0x50/0x50 [ 36.110101] hrtimer_interrupt+0x1d4/0x5f0 [ 36.110466] ? destroy_worker+0x580/0x580 [ 36.110840] local_apic_timer_interrupt+0x6b/0xa0 [ 36.111304] smp_apic_timer_interrupt+0x71/0xa0 [ 36.111715] apic_timer_interrupt+0x9d/0xb0 [ 36.112140] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.112563] RSP: 0018:ffff88006de07a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.113256] RAX: dffffc0000000000 RBX: ffff88006de1c200 RCX: 0000000000000000 [ 36.113875] RDX: 1ffffffff0b5915f RSI: 0000000000000000 RDI: ffffffff85ac8af8 [ 36.114498] RBP: ffff88006de07a98 R08: ffff88006de073f8 R09: 0000000000000000 [ 36.115189] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de25200 [ 36.115810] R13: dffffc0000000000 R14: ffffffff8145b7a0 R15: ffff88006de07d70 [ 36.116442] ? destroy_worker+0x580/0x580 [ 36.116835] __run_timers+0x7ef/0xb90 [ 36.117198] ? msleep_interruptible+0x170/0x170 [ 36.117583] ? lock_acquire+0x1d5/0x580 [ 36.117959] ? __hrtimer_run_queues+0x385/0xe10 [ 36.118385] ? find_held_lock+0x39/0x1d0 [ 36.118734] ? lock_downgrade+0x990/0x990 [ 36.119149] ? lock_acquire+0x1d5/0x580 [ 36.119475] ? clockevents_program_event+0x163/0x2e0 [ 36.119927] ? pvclock_read_flags+0x160/0x160 [ 36.120348] ? rcu_pm_notify+0xc0/0xc0 [ 36.120687] run_timer_softirq+0x67/0x80 [ 36.121087] __do_softirq+0x2bb/0xbd0 [ 36.121413] ? __softirqentry_text_start+0x8/0x8 [ 36.121835] ? native_apic_msr_write+0x5c/0x80 [ 36.122250] ? lapic_next_event+0x5a/0x90 [ 36.122594] ? clockevents_program_event+0x108/0x2e0 [ 36.123082] ? tick_program_event+0x7f/0xd0 [ 36.123442] ? hrtimer_interrupt+0x489/0x5f0 [ 36.123863] irq_exit+0x1d3/0x210 [ 36.124184] smp_apic_timer_interrupt+0x76/0xa0 [ 36.124576] apic_timer_interrupt+0x9d/0xb0 [ 36.124961] [ 36.125184] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.125566] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.126515] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.127174] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.127767] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.128430] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.129091] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.129701] default_idle+0xbf/0x460 [ 36.130076] ? __sched_text_end+0x4/0x4 [ 36.130416] ? tick_nohz_idle_enter+0xde/0x160 [ 36.130830] arch_cpu_idle+0xa/0x10 [ 36.131165] default_idle_call+0x36/0x90 [ 36.131728] do_idle+0x256/0x3b0 [ 36.132281] cpu_startup_entry+0x18/0x20 [ 36.132759] start_secondary+0x277/0x310 [ 36.133253] secondary_startup_64+0xa5/0xa5 [ 36.133886] Dumping ftrace buffer: [ 36.134329] (ftrace buffer empty) [ 36.134712] Kernel Offset: disabled [ 36.135133] Rebooting in 86400 seconds..