2017/08/22 18:07:33 fuzzer started 2017/08/22 18:07:33 dialing manager at 10.0.2.10:34489 syzkaller login: [ 36.074076] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [swapper/2:0] [ 36.074681] Modules linked in: [ 36.074955] irq event stamp: 24634077 [ 36.075275] hardirqs last enabled at (24634076): [] _raw_spin_unlock_irq+0x27/0x70 [ 36.076037] hardirqs last disabled at (24634077): [] apic_timer_interrupt+0x98/0xb0 [ 36.076799] softirqs last enabled at (108502): [] _local_bh_enable+0x1c/0x30 [ 36.077467] softirqs last disabled at (108503): [] irq_exit+0x1d3/0x210 [ 36.078503] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.13.0-rc6-next-20170822+ #6 [ 36.079066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.079655] task: ffff88006dac6040 task.stack: ffff88006dac8000 [ 36.080147] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.080558] RSP: 0018:ffff88006de077a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.081177] RAX: dffffc0000000000 RBX: ffff88006de25200 RCX: 0000000000000002 [ 36.081769] RDX: 1ffffffff0b5915f RSI: 1ffff1000db58d1f RDI: ffffffff85ac8af8 [ 36.082352] RBP: ffff88006de077a8 R08: ffff88006de06e20 R09: 0000000000000000 [ 36.082922] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de07850 [ 36.083496] R13: ffff88006de2526c R14: ffff88006af8d100 R15: dffffc0000000000 [ 36.084064] FS: 0000000000000000(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 [ 36.084708] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.085468] CR2: 00007ffd4ce22a58 CR3: 000000003b158000 CR4: 00000000000006e0 [ 36.086428] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.087377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.088319] Call Trace: [ 36.088665] [ 36.088956] idle_worker_timeout+0x2e3/0x400 [ 36.089547] ? ktime_get_resolution_ns+0x300/0x300 [ 36.090208] ? destroy_worker+0x580/0x580 [ 36.090764] ? __lock_is_held+0xbc/0x140 [ 36.091098] call_timer_fn+0x246/0x850 [ 36.091409] ? destroy_worker+0x580/0x580 [ 36.091743] ? init_timer_key+0x3b0/0x3b0 [ 36.092091] ? lock_downgrade+0x990/0x990 [ 36.092444] ? __run_timers+0x809/0xb90 [ 36.092778] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.093178] ? do_raw_spin_trylock+0x190/0x190 [ 36.093560] ? __lock_is_held+0xbc/0x140 [ 36.093899] ? destroy_worker+0x580/0x580 [ 36.094248] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.094662] ? destroy_worker+0x580/0x580 [ 36.095004] __run_timers+0x7fd/0xb90 [ 36.095334] ? msleep_interruptible+0x170/0x170 [ 36.095714] ? lock_acquire+0x1d5/0x580 [ 36.096035] ? __hrtimer_run_queues+0x385/0xe10 [ 36.096421] ? find_held_lock+0x39/0x1d0 [ 36.096761] ? lock_downgrade+0x990/0x990 [ 36.097105] ? lock_acquire+0x1d5/0x580 [ 36.097437] ? clockevents_program_event+0x163/0x2e0 [ 36.097868] ? pvclock_read_flags+0x160/0x160 [ 36.098229] ? rcu_pm_notify+0xc0/0xc0 [ 36.098526] run_timer_softirq+0x67/0x80 [ 36.098806] __do_softirq+0x2bb/0xbd0 [ 36.099080] ? __softirqentry_text_start+0x8/0x8 [ 36.099873] ? native_apic_msr_write+0x5c/0x80 [ 36.100484] ? lapic_next_event+0x5a/0x90 [ 36.101037] ? clockevents_program_event+0x108/0x2e0 [ 36.101722] ? tick_program_event+0x7f/0xd0 [ 36.102303] ? hrtimer_interrupt+0x489/0x5f0 [ 36.102672] irq_exit+0x1d3/0x210 [ 36.102950] smp_apic_timer_interrupt+0x76/0xa0 [ 36.103546] apic_timer_interrupt+0x9d/0xb0 [ 36.104113] [ 36.104412] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.105041] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.106062] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.107013] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.107964] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.108916] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.109873] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.110853] default_idle+0xbf/0x460 [ 36.111349] ? __sched_text_end+0x4/0x4 [ 36.111885] ? tick_nohz_idle_enter+0xde/0x160 [ 36.112495] arch_cpu_idle+0xa/0x10 [ 36.112976] default_idle_call+0x36/0x90 [ 36.113517] do_idle+0x256/0x3b0 [ 36.113972] cpu_startup_entry+0x18/0x20 [ 36.114512] start_secondary+0x277/0x310 [ 36.115052] secondary_startup_64+0xa5/0xa5 [ 36.115637] 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 [ 36.118498] Kernel panic - not syncing: softlockup: hung tasks [ 36.119284] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G L 4.13.0-rc6-next-20170822+ #6 [ 36.119918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 36.120903] Call Trace: [ 36.121090] [ 36.121291] dump_stack+0x194/0x257 [ 36.121790] ? arch_local_irq_restore+0x53/0x53 [ 36.122409] ? vprintk_default+0x28/0x30 [ 36.122946] ? vprintk_func+0x5e/0xc0 [ 36.123461] panic+0x1e4/0x41c [ 36.123887] ? refcount_error_report+0x214/0x214 [ 36.124536] watchdog_timer_fn+0x401/0x410 [ 36.125102] ? watchdog_park_threads+0x240/0x240 [ 36.125746] __hrtimer_run_queues+0x349/0xe10 [ 36.126350] ? watchdog_park_threads+0x240/0x240 [ 36.127010] ? hrtimer_cancel+0x40/0x40 [ 36.127550] ? pvclock_read_flags+0x160/0x160 [ 36.128159] ? kvm_clock_get_cycles+0x25/0x30 [ 36.128755] ? ktime_get_update_offsets_now+0x34a/0x520 [ 36.129471] ? do_timer+0x50/0x50 [ 36.129933] ? trace_hardirqs_off+0xd/0x10 [ 36.130509] hrtimer_interrupt+0x1d4/0x5f0 [ 36.131088] local_apic_timer_interrupt+0x6b/0xa0 [ 36.131731] smp_apic_timer_interrupt+0x71/0xa0 [ 36.132355] apic_timer_interrupt+0x9d/0xb0 [ 36.132926] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 36.133606] RSP: 0018:ffff88006de077a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.134637] RAX: dffffc0000000000 RBX: ffff88006de25200 RCX: 0000000000000002 [ 36.135599] RDX: 1ffffffff0b5915f RSI: 1ffff1000db58d1f RDI: ffffffff85ac8af8 [ 36.136551] RBP: ffff88006de077a8 R08: ffff88006de06e20 R09: 0000000000000000 [ 36.137493] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006de07850 [ 36.138116] R13: ffff88006de2526c R14: ffff88006af8d100 R15: dffffc0000000000 [ 36.138751] idle_worker_timeout+0x2e3/0x400 [ 36.139132] ? ktime_get_resolution_ns+0x300/0x300 [ 36.139563] ? destroy_worker+0x580/0x580 [ 36.139926] ? __lock_is_held+0xbc/0x140 [ 36.140286] call_timer_fn+0x246/0x850 [ 36.140626] ? destroy_worker+0x580/0x580 [ 36.141169] ? init_timer_key+0x3b0/0x3b0 [ 36.141514] ? lock_downgrade+0x990/0x990 [ 36.141875] ? __run_timers+0x809/0xb90 [ 36.142226] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.142647] ? do_raw_spin_trylock+0x190/0x190 [ 36.143048] ? __lock_is_held+0xbc/0x140 [ 36.143406] ? destroy_worker+0x580/0x580 [ 36.143769] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 36.144203] ? destroy_worker+0x580/0x580 [ 36.144566] __run_timers+0x7fd/0xb90 [ 36.144907] ? msleep_interruptible+0x170/0x170 [ 36.145310] ? lock_acquire+0x1d5/0x580 [ 36.145661] ? __hrtimer_run_queues+0x385/0xe10 [ 36.146074] ? find_held_lock+0x39/0x1d0 [ 36.146434] ? lock_downgrade+0x990/0x990 [ 36.146820] ? lock_acquire+0x1d5/0x580 [ 36.147168] ? clockevents_program_event+0x163/0x2e0 [ 36.147625] ? pvclock_read_flags+0x160/0x160 [ 36.148016] ? rcu_pm_notify+0xc0/0xc0 [ 36.148364] run_timer_softirq+0x67/0x80 [ 36.148720] __do_softirq+0x2bb/0xbd0 [ 36.149063] ? __softirqentry_text_start+0x8/0x8 [ 36.149482] ? native_apic_msr_write+0x5c/0x80 [ 36.149881] ? lapic_next_event+0x5a/0x90 [ 36.150241] ? clockevents_program_event+0x108/0x2e0 [ 36.150688] ? tick_program_event+0x7f/0xd0 [ 36.151069] ? hrtimer_interrupt+0x489/0x5f0 [ 36.151465] irq_exit+0x1d3/0x210 [ 36.151771] smp_apic_timer_interrupt+0x76/0xa0 [ 36.152179] apic_timer_interrupt+0x9d/0xb0 [ 36.152551] [ 36.152750] RIP: 0010:native_safe_halt+0x6/0x10 [ 36.153160] RSP: 0018:ffff88006dacfdb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 36.153831] RAX: dffffc0000000000 RBX: 1ffff1000db59fb9 RCX: 0000000000000000 [ 36.154455] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 36.155080] RBP: ffff88006dacfdb0 R08: ffffffff85804a90 R09: 0000000000000000 [ 36.155702] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 36.156321] R13: ffff88006dacfe68 R14: 0000000000000000 R15: ffff88006dac6040 [ 36.156963] default_idle+0xbf/0x460 [ 36.157289] ? __sched_text_end+0x4/0x4 [ 36.157647] ? tick_nohz_idle_enter+0xde/0x160 [ 36.158048] arch_cpu_idle+0xa/0x10 [ 36.158368] default_idle_call+0x36/0x90 [ 36.158724] do_idle+0x256/0x3b0 [ 36.159023] cpu_startup_entry+0x18/0x20 [ 36.159378] start_secondary+0x277/0x310 [ 36.159733] secondary_startup_64+0xa5/0xa5 [ 36.160226] Dumping ftrace buffer: [ 36.160571] (ftrace buffer empty) [ 36.160892] Kernel Offset: disabled [ 36.161218] Rebooting in 86400 seconds..