INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-next-kasan-gce-6,10.128.0.15' (ECDSA) to the list of known hosts. 2017/08/22 13:47:32 fuzzer started 2017/08/22 13:47:32 dialing manager at 10.128.0.26:40833 syzkaller login: [ 52.070036] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:0] [ 52.077171] Modules linked in: [ 52.080353] irq event stamp: 22704955 [ 52.084145] hardirqs last enabled at (22704954): [] _raw_spin_unlock_irq+0x27/0x70 [ 52.093490] hardirqs last disabled at (22704955): [] apic_timer_interrupt+0x98/0xb0 [ 52.102835] softirqs last enabled at (201118): [] _local_bh_enable+0x1c/0x30 [ 52.111659] softirqs last disabled at (201119): [] irq_exit+0x1d3/0x210 [ 52.119958] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.13.0-rc6-next-20170822+ #6 [ 52.127994] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.137328] task: ffffffff85a2f3c0 task.stack: ffffffff85a00000 [ 52.143367] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 52.148449] RSP: 0018:ffff8801db207a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 52.156147] RAX: dffffc0000000000 RBX: ffff8801db21c200 RCX: 0000000000000000 [ 52.163397] RDX: 1ffffffff0b5915f RSI: 0000000000000000 RDI: ffffffff85ac8af8 [ 52.170650] RBP: ffff8801db207a98 R08: ffff8801db2073f8 R09: 0000000000000000 [ 52.177903] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801db225200 [ 52.185155] R13: dffffc0000000000 R14: ffffffff8145b7a0 R15: ffff8801db207d70 [ 52.192410] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 52.200620] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.207004] CR2: 00005647e7d76278 CR3: 00000001ccb1c000 CR4: 00000000001406f0 [ 52.214259] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.221510] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.228759] Call Trace: [ 52.231323] [ 52.233465] __run_timers+0x7ef/0xb90 [ 52.237268] ? msleep_interruptible+0x170/0x170 [ 52.241927] ? lock_acquire+0x1d5/0x580 [ 52.245888] ? __hrtimer_run_queues+0x385/0xe10 [ 52.250550] ? find_held_lock+0x39/0x1d0 [ 52.254615] ? lock_downgrade+0x990/0x990 [ 52.258759] ? lock_acquire+0x1d5/0x580 [ 52.262722] ? clockevents_program_event+0x163/0x2e0 [ 52.267831] ? pvclock_read_flags+0x160/0x160 [ 52.272311] ? rcu_pm_notify+0xc0/0xc0 [ 52.276209] run_timer_softirq+0x67/0x80 [ 52.280258] __do_softirq+0x2bb/0xbd0 [ 52.284061] ? __softirqentry_text_start+0x8/0x8 [ 52.288801] ? native_apic_msr_write+0x5c/0x80 [ 52.293370] ? lapic_next_event+0x5a/0x90 [ 52.297505] ? clockevents_program_event+0x108/0x2e0 [ 52.302596] ? tick_program_event+0x7f/0xd0 [ 52.306908] ? hrtimer_interrupt+0x489/0x5f0 [ 52.311336] irq_exit+0x1d3/0x210 [ 52.314782] smp_apic_timer_interrupt+0x76/0xa0 [ 52.319441] apic_timer_interrupt+0x9d/0xb0 [ 52.323746] [ 52.325970] RIP: 0010:native_safe_halt+0x6/0x10 [ 52.330617] RSP: 0018:ffffffff85a07ce0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 52.338315] RAX: dffffc0000000000 RBX: 1ffffffff0b40f9f RCX: 0000000000000000 [ 52.345569] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 52.352820] RBP: ffffffff85a07ce0 R08: ffffffff85804a80 R09: 0000000000000000 [ 52.360075] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 52.367332] R13: ffffffff85a07d98 R14: 0000000000000000 R15: ffffffff85a2f3c0 [ 52.374622] default_idle+0xbf/0x460 [ 52.378321] ? __sched_text_end+0x4/0x4 [ 52.382312] arch_cpu_idle+0xa/0x10 [ 52.385926] default_idle_call+0x36/0x90 [ 52.389974] do_idle+0x256/0x3b0 [ 52.393334] cpu_startup_entry+0x18/0x20 [ 52.397381] rest_init+0xed/0xf0 [ 52.400734] start_kernel+0x782/0x7a8 [ 52.404519] ? mem_encrypt_init+0xb/0xb [ 52.408484] ? memcpy_orig+0x16/0x110 [ 52.412266] ? early_idt_handler_array+0x120/0x120 [ 52.417179] x86_64_start_reservations+0x2a/0x2c [ 52.421916] x86_64_start_kernel+0x13c/0x149 [ 52.426318] secondary_startup_64+0xa5/0xa5 [ 52.430643] 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 [ 52.450212] Kernel panic - not syncing: softlockup: hung tasks [ 52.456165] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G L 4.13.0-rc6-next-20170822+ #6 [ 52.465066] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.474396] Call Trace: [ 52.476964] [ 52.479099] dump_stack+0x194/0x257 [ 52.482712] ? arch_local_irq_restore+0x53/0x53 [ 52.487363] ? vprintk_default+0x28/0x30 [ 52.491408] ? vprintk_func+0x5e/0xc0 [ 52.495210] panic+0x1e4/0x41c [ 52.498390] ? refcount_error_report+0x214/0x214 [ 52.503164] watchdog_timer_fn+0x401/0x410 [ 52.507472] ? watchdog_park_threads+0x240/0x240 [ 52.512229] __hrtimer_run_queues+0x349/0xe10 [ 52.516713] ? watchdog_park_threads+0x240/0x240 [ 52.521454] ? hrtimer_cancel+0x40/0x40 [ 52.525424] ? pvclock_read_flags+0x160/0x160 [ 52.529900] ? lock_downgrade+0x990/0x990 [ 52.534054] ? kvm_clock_get_cycles+0x25/0x30 [ 52.538535] ? ktime_get_update_offsets_now+0x34a/0x520 [ 52.543892] ? do_timer+0x50/0x50 [ 52.547359] hrtimer_interrupt+0x1d4/0x5f0 [ 52.551601] ? destroy_worker+0x580/0x580 [ 52.555735] local_apic_timer_interrupt+0x6b/0xa0 [ 52.560563] smp_apic_timer_interrupt+0x71/0xa0 [ 52.565220] apic_timer_interrupt+0x9d/0xb0 [ 52.569532] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 [ 52.574611] RSP: 0018:ffff8801db207a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 52.582305] RAX: dffffc0000000000 RBX: ffff8801db21c200 RCX: 0000000000000000 [ 52.589559] RDX: 1ffffffff0b5915f RSI: 0000000000000000 RDI: ffffffff85ac8af8 [ 52.596811] RBP: ffff8801db207a98 R08: ffff8801db2073f8 R09: 0000000000000000 [ 52.604061] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801db225200 [ 52.611311] R13: dffffc0000000000 R14: ffffffff8145b7a0 R15: ffff8801db207d70 [ 52.618570] ? destroy_worker+0x580/0x580 [ 52.622726] __run_timers+0x7ef/0xb90 [ 52.626527] ? msleep_interruptible+0x170/0x170 [ 52.631179] ? lock_acquire+0x1d5/0x580 [ 52.635137] ? __hrtimer_run_queues+0x385/0xe10 [ 52.639801] ? find_held_lock+0x39/0x1d0 [ 52.643859] ? lock_downgrade+0x990/0x990 [ 52.647998] ? lock_acquire+0x1d5/0x580 [ 52.651955] ? clockevents_program_event+0x163/0x2e0 [ 52.657063] ? pvclock_read_flags+0x160/0x160 [ 52.661544] ? rcu_pm_notify+0xc0/0xc0 [ 52.665437] run_timer_softirq+0x67/0x80 [ 52.669487] __do_softirq+0x2bb/0xbd0 [ 52.673289] ? __softirqentry_text_start+0x8/0x8 [ 52.678032] ? native_apic_msr_write+0x5c/0x80 [ 52.682597] ? lapic_next_event+0x5a/0x90 [ 52.686727] ? clockevents_program_event+0x108/0x2e0 [ 52.691816] ? tick_program_event+0x7f/0xd0 [ 52.696125] ? hrtimer_interrupt+0x489/0x5f0 [ 52.700546] irq_exit+0x1d3/0x210 [ 52.703983] smp_apic_timer_interrupt+0x76/0xa0 [ 52.708641] apic_timer_interrupt+0x9d/0xb0 [ 52.712938] [ 52.715159] RIP: 0010:native_safe_halt+0x6/0x10 [ 52.719807] RSP: 0018:ffffffff85a07ce0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 52.727506] RAX: dffffc0000000000 RBX: 1ffffffff0b40f9f RCX: 0000000000000000 [ 52.734756] RDX: 1ffffffff0b59160 RSI: 0000000000000001 RDI: ffffffff85ac8b00 [ 52.742007] RBP: ffffffff85a07ce0 R08: ffffffff85804a80 R09: 0000000000000000 [ 52.749259] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac8af0 [ 52.756509] R13: ffffffff85a07d98 R14: 0000000000000000 R15: ffffffff85a2f3c0 [ 52.763802] default_idle+0xbf/0x460 [ 52.767504] ? __sched_text_end+0x4/0x4 [ 52.771491] arch_cpu_idle+0xa/0x10 [ 52.775098] default_idle_call+0x36/0x90 [ 52.779142] do_idle+0x256/0x3b0 [ 52.782501] cpu_startup_entry+0x18/0x20 [ 52.786546] rest_init+0xed/0xf0 [ 52.789897] start_kernel+0x782/0x7a8 [ 52.793683] ? mem_encrypt_init+0xb/0xb [ 52.797650] ? memcpy_orig+0x16/0x110 [ 52.801439] ? early_idt_handler_array+0x120/0x120 [ 52.806359] x86_64_start_reservations+0x2a/0x2c [ 52.811098] x86_64_start_kernel+0x13c/0x149 [ 52.815498] secondary_startup_64+0xa5/0xa5 [ 52.820424] Dumping ftrace buffer: [ 52.824005] (ftrace buffer empty) [ 52.827687] Kernel Offset: disabled [ 52.831292] Rebooting in 86400 seconds..