Debian GNU/Linux 7 syzkaller ttyS0 2017/08/22 21:47:25 fuzzer started 2017/08/22 21:47:25 dialing manager at 10.0.2.10:34489 syzkaller login: [ 36.055115] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [swapper/2:0] [ 36.055716] Modules linked in: [ 36.055982] irq event stamp: 24784551 [ 36.056286] hardirqs last enabled at (24784550): [] _raw_spin_unlock_irq+0x27/0x70 [ 36.057018] hardirqs last disabled at (24784551): [] apic_timer_interrupt+0x98/0xb0 [ 36.057759] softirqs last enabled at (97080): [] _local_bh_enable+0x1c/0x30 [ 36.058436] softirqs last disabled at (97081): [] irq_exit+0x1d3/0x210 [ 36.059090] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.13.0-rc6-next-20170822+ #6 [ 36.059698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.060345] task: ffff88006dac6040 task.stack: ffff88006dac8000 [ 36.060828] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.061233] RSP: 0018:ffff88006de07a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.061766] RAX: dffffc0000000000 RBX: ffff88006de1c200 RCX: 0000000000000000 [ 36.062555] RDX: 1ffffffff0b5915f RSI: 0000000000000000 RDI: ffffffff85ac8af8 [ 36.063143] RBP: ffff88006de07a98 R08: ffff88006de073f8 R09: 0000000000000000 [ 36.063709] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de25200 [ 36.064305] R13: dffffc0000000000 R14: ffffffff8145b7a0 R15: ffff88006de07d70 [ 36.064876] FS: 0000000000000000(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 [ 36.065553] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.066044] CR2: 00007f493643a1b0 CR3: 000000006b6e7000 CR4: 00000000000006e0 [ 36.066623] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.067201] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.067810] Call Trace: [ 36.068015] [ 36.068197] __run_timers+0x7ef/0xb90 [ 36.068534] ? msleep_interruptible+0x170/0x170 [ 36.068915] ? lock_acquire+0x1d5/0x580 [ 36.069239] ? __hrtimer_run_queues+0x385/0xe10 [ 36.069629] ? find_held_lock+0x39/0x1d0 [ 36.069971] ? lock_downgrade+0x990/0x990 [ 36.070316] ? lock_acquire+0x1d5/0x580 [ 36.070643] ? clockevents_program_event+0x163/0x2e0 [ 36.071069] ? pvclock_read_flags+0x160/0x160 [ 36.071429] ? rcu_pm_notify+0xc0/0xc0 [ 36.071756] run_timer_softirq+0x67/0x80 [ 36.072077] __do_softirq+0x2bb/0xbd0 [ 36.072394] ? __softirqentry_text_start+0x8/0x8 [ 36.072778] ? native_apic_msr_write+0x5c/0x80 [ 36.073146] ? lapic_next_event+0x5a/0x90 [ 36.073482] ? clockevents_program_event+0x108/0x2e0 [ 36.073900] ? tick_program_event+0x7f/0xd0 [ 36.074249] ? hrtimer_interrupt+0x489/0x5f0 [ 36.074620] irq_exit+0x1d3/0x210 [ 36.074895] smp_apic_timer_interrupt+0x76/0xa0 [ 36.075264] apic_timer_interrupt+0x9d/0xb0 [ 36.075603] [ 36.075782] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.076184] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.076784] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.077341] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.077902] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.078461] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.079024] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.079605] default_idle+0xbf/0x460 [ 36.079898] ? __sched_text_end+0x4/0x4 [ 36.080221] ? tick_nohz_idle_enter+0xde/0x160 [ 36.080585] arch_cpu_idle+0xa/0x10 [ 36.080870] default_idle_call+0x36/0x90 [ 36.081189] do_idle+0x256/0x3b0 [ 36.081461] cpu_startup_entry+0x18/0x20 [ 36.081779] start_secondary+0x277/0x310 [ 36.082102] secondary_startup_64+0xa5/0xa5 [ 36.082454] 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 [ 36.084380] Kernel panic - not syncing: softlockup: hung tasks [ 36.084852] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G L 4.13.0-rc6-next-20170822+ #6 [ 36.085564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.086215] Call Trace: [ 36.086420] [ 36.086595] dump_stack+0x194/0x257 [ 36.086897] ? arch_local_irq_restore+0x53/0x53 [ 36.087272] ? vprintk_default+0x28/0x30 [ 36.087595] ? vprintk_func+0x5e/0xc0 [ 36.087910] panic+0x1e4/0x41c [ 36.088170] ? refcount_error_report+0x214/0x214 [ 36.088566] watchdog_timer_fn+0x401/0x410 [ 36.088908] ? watchdog_park_threads+0x240/0x240 [ 36.089298] __hrtimer_run_queues+0x349/0xe10 [ 36.089661] ? watchdog_park_threads+0x240/0x240 [ 36.090045] ? hrtimer_cancel+0x40/0x40 [ 36.090372] ? pvclock_read_flags+0x160/0x160 [ 36.090732] ? lock_downgrade+0x990/0x990 [ 36.091075] ? kvm_clock_get_cycles+0x25/0x30 [ 36.091434] ? ktime_get_update_offsets_now+0x34a/0x520 [ 36.091866] ? do_timer+0x50/0x50 [ 36.092161] hrtimer_interrupt+0x1d4/0x5f0 [ 36.092523] ? destroy_worker+0x580/0x580 [ 36.092857] local_apic_timer_interrupt+0x6b/0xa0 [ 36.093254] smp_apic_timer_interrupt+0x71/0xa0 [ 36.093636] apic_timer_interrupt+0x9d/0xb0 [ 36.093990] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.094401] RSP: 0018:ffff88006de07a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.095028] RAX: dffffc0000000000 RBX: ffff88006de1c200 RCX: 0000000000000000 [ 36.095613] RDX: 1ffffffff0b5915f RSI: 0000000000000000 RDI: ffffffff85ac8af8 [ 36.096197] RBP: ffff88006de07a98 R08: ffff88006de073f8 R09: 0000000000000000 [ 36.096781] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de25200 [ 36.097365] R13: dffffc0000000000 R14: ffffffff8145b7a0 R15: ffff88006de07d70 [ 36.097953] ? destroy_worker+0x580/0x580 [ 36.098322] __run_timers+0x7ef/0xb90 [ 36.098643] ? msleep_interruptible+0x170/0x170 [ 36.099025] ? lock_acquire+0x1d5/0x580 [ 36.099348] ? __hrtimer_run_queues+0x385/0xe10 [ 36.099735] ? find_held_lock+0x39/0x1d0 [ 36.100079] ? lock_downgrade+0x990/0x990 [ 36.100427] ? lock_acquire+0x1d5/0x580 [ 36.100749] ? clockevents_program_event+0x163/0x2e0 [ 36.101175] ? pvclock_read_flags+0x160/0x160 [ 36.101539] ? rcu_pm_notify+0xc0/0xc0 [ 36.101870] run_timer_softirq+0x67/0x80 [ 36.102200] __do_softirq+0x2bb/0xbd0 [ 36.102518] ? __softirqentry_text_start+0x8/0x8 [ 36.102911] ? native_apic_msr_write+0x5c/0x80 [ 36.103298] ? lapic_next_event+0x5a/0x90 [ 36.103635] ? clockevents_program_event+0x108/0x2e0 [ 36.104051] ? tick_program_event+0x7f/0xd0 [ 36.104378] ? hrtimer_interrupt+0x489/0x5f0 [ 36.104703] irq_exit+0x1d3/0x210 [ 36.104946] smp_apic_timer_interrupt+0x76/0xa0 [ 36.105516] apic_timer_interrupt+0x9d/0xb0 [ 36.105862] [ 36.106052] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.106432] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.107066] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.107654] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.108239] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.108819] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.109399] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.110001] default_idle+0xbf/0x460 [ 36.110317] ? __sched_text_end+0x4/0x4 [ 36.110652] ? tick_nohz_idle_enter+0xde/0x160 [ 36.111034] arch_cpu_idle+0xa/0x10 [ 36.111332] default_idle_call+0x36/0x90 [ 36.111671] do_idle+0x256/0x3b0 [ 36.111957] cpu_startup_entry+0x18/0x20 [ 36.112293] start_secondary+0x277/0x310 [ 36.112634] secondary_startup_64+0xa5/0xa5 [ 36.113143] Dumping ftrace buffer: [ 36.113481] (ftrace buffer empty) [ 36.113780] Kernel Offset: disabled [ 36.114088] Rebooting in 86400 seconds..