2017/08/27 12:51:34 fuzzer started 2017/08/27 12:51:34 dialing manager at 10.0.2.10:34105 syzkaller login: [ 31.200148] NETDEV WATCHDOG: eth0 (e1000): transmit queue 0 timed out [ 31.202013] ------------[ cut here ]------------ [ 31.203729] WARNING: CPU: 3 PID: 1396 at net/sched/sch_generic.c:320 dev_watchdog+0x821/0xa10 [ 31.208505] Kernel panic - not syncing: panic_on_warn set ... [ 31.208505] [ 31.210704] CPU: 3 PID: 1396 Comm: jbd2/sda1-8 Not tainted 4.13.0-rc6-next-20170825+ #9 [ 31.212741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 31.214915] Call Trace: [ 31.215582] [ 31.217171] dump_stack+0x194/0x257 [ 31.218316] ? arch_local_irq_restore+0x53/0x53 [ 31.219425] panic+0x1e4/0x41c [ 31.220039] ? refcount_error_report+0x214/0x214 [ 31.220906] ? show_regs_print_info+0x65/0x65 [ 31.221801] ? dev_watchdog+0x821/0xa10 [ 31.222632] __warn+0x1c4/0x1e0 [ 31.223222] ? dev_watchdog+0x821/0xa10 [ 31.223910] report_bug+0x211/0x2d0 [ 31.225219] fixup_bug+0x40/0x90 [ 31.225819] do_trap+0x260/0x390 [ 31.226414] do_error_trap+0x120/0x390 [ 31.227328] ? vprintk_emit+0x49b/0x590 [ 31.227937] ? do_trap+0x390/0x390 [ 31.228508] ? dev_watchdog+0x821/0xa10 [ 31.229280] ? vprintk_emit+0x3ea/0x590 [ 31.230656] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.231604] do_invalid_op+0x1b/0x20 [ 31.232086] invalid_op+0x18/0x20 [ 31.232570] RIP: 0010:dev_watchdog+0x821/0xa10 [ 31.233125] RSP: 0018:ffff88006df077b8 EFLAGS: 00010286 [ 31.233764] RAX: 0000000000000039 RBX: ffff88006ac44080 RCX: 0000000000000000 [ 31.234647] RDX: 0000000000000039 RSI: 1ffff1000dbe0eb7 RDI: ffffed000dbe0eeb [ 31.235641] RBP: ffff88006df078b8 R08: ffff88006df06ea8 R09: 0000000000000000 [ 31.237022] R10: ffff88006a650640 R11: 0000000000000000 R12: 0000000000000000 [ 31.237979] R13: dffffc0000000000 R14: ffff88006ac44560 R15: ffff88006b362c80 [ 31.239028] ? dev_watchdog+0x821/0xa10 [ 31.239605] ? qdisc_rcu_free+0x110/0x110 [ 31.240211] ? __lock_is_held+0xbc/0x140 [ 31.240839] call_timer_fn+0x246/0x850 [ 31.241383] ? qdisc_rcu_free+0x110/0x110 [ 31.242008] ? init_timer_key+0x3b0/0x3b0 [ 31.242584] ? lock_downgrade+0x990/0x990 [ 31.243214] ? update_max_interval+0x60/0x60 [ 31.243854] ? __run_timers+0x1ce/0xb90 [ 31.244491] ? do_raw_spin_trylock+0x190/0x190 [ 31.245151] ? __lock_is_held+0xbc/0x140 [ 31.245712] ? qdisc_rcu_free+0x110/0x110 [ 31.246182] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 31.246759] ? qdisc_rcu_free+0x110/0x110 [ 31.247247] __run_timers+0x7fd/0xb90 [ 31.247741] ? msleep_interruptible+0x170/0x170 [ 31.248293] ? timerqueue_add+0x1e9/0x280 [ 31.248795] ? find_held_lock+0x39/0x1d0 [ 31.249304] ? lock_downgrade+0x990/0x990 [ 31.249786] ? lock_acquire+0x1d5/0x580 [ 31.250159] ? clockevents_program_event+0x163/0x2e0 [ 31.251529] ? pvclock_read_flags+0x160/0x160 [ 31.252051] ? rcu_pm_notify+0xc0/0xc0 [ 31.252521] run_timer_softirq+0x21/0x80 [ 31.253010] __do_softirq+0x2bb/0xbd0 [ 31.253497] ? __softirqentry_text_start+0x8/0x8 [ 31.254087] ? native_apic_msr_write+0x5c/0x80 [ 31.254665] ? lapic_next_event+0x5a/0x90 [ 31.255099] ? clockevents_program_event+0x108/0x2e0 [ 31.255683] ? tick_program_event+0x7f/0xd0 [ 31.256132] ? hrtimer_interrupt+0x489/0x5f0 [ 31.256586] irq_exit+0x1d3/0x210 [ 31.256887] smp_apic_timer_interrupt+0x76/0xa0 [ 31.257228] apic_timer_interrupt+0x9d/0xb0 [ 31.257534] [ 31.257706] RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x60 [ 31.258071] RSP: 0018:ffff88006a65e850 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 31.258610] RAX: ffff88006a650640 RBX: 1ffff1000d4cbd0f RCX: 0000000000000000 [ 31.259104] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88006dbffc14 [ 31.259604] RBP: ffff88006a65eac0 R08: 0000000000001000 R09: 1ffff1000d4cbcf4 [ 31.260098] R10: ffff88006a650640 R11: 00000000fffff8f8 R12: ffff88006ac4ac80 [ 31.260611] R13: ffff88006a65ea98 R14: ffff88006dbffc00 R15: ffff88006a65ebf0 [ 31.261133] ? blk_queue_bio+0x16e/0x1450 [ 31.261418] ? generic_make_request_checks+0x49a/0x1cf0 [ 31.261804] ? blk_flush_plug_list+0xaf0/0xaf0 [ 31.262117] ? blk_queue_enter+0x59b/0x740 [ 31.262411] ? blk_exit_rl+0x80/0x80 [ 31.262674] ? kasan_kmalloc+0xad/0xe0 [ 31.262958] ? kasan_slab_alloc+0x12/0x20 [ 31.263246] ? kmem_cache_alloc+0x12e/0x760 [ 31.263570] ? alloc_buffer_head+0x76/0x190 [ 31.263865] ? jbd2_journal_write_metadata_buffer+0x113/0xce0 [ 31.264250] ? kjournald2+0x2bf/0xbd0 [ 31.264500] ? kthread+0x39c/0x470 [ 31.264739] ? check_noncircular+0x20/0x20 [ 31.265007] ? ext4_map_blocks+0xa3e/0x1830 [ 31.265278] ? rcu_pm_notify+0xc0/0xc0 [ 31.265519] ? mempool_alloc_slab+0x44/0x60 [ 31.265823] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.266129] generic_make_request+0x435/0xe20 [ 31.266436] ? blk_queue_enter+0x740/0x740 [ 31.266709] ? mempool_alloc+0x177/0x4b0 [ 31.266974] ? memset+0x31/0x40 [ 31.267175] ? bio_init+0x94/0x210 [ 31.267403] ? bio_add_page+0x360/0x360 [ 31.267657] ? do_raw_spin_trylock+0x190/0x190 [ 31.267947] ? __jbd2_journal_file_buffer+0x399/0x800 [ 31.268367] ? jbd2_journal_try_to_free_buffers+0x4b0/0x4b0 [ 31.268887] submit_bio+0x18b/0x520 [ 31.269213] ? submit_bio+0x18b/0x520 [ 31.269556] ? generic_make_request+0xe20/0xe20 [ 31.269891] ? bio_add_page+0x210/0x360 [ 31.270170] ? guard_bio_eod+0xd3/0x320 [ 31.270493] submit_bh_wbc+0x4e9/0x680 [ 31.270779] submit_bh+0x28/0x30 [ 31.270989] ? jbd2_journal_begin_ordered_truncate+0x190/0x190 [ 31.271349] jbd2_journal_commit_transaction+0x221f/0x7cf0 [ 31.271684] ? check_noncircular+0x20/0x20 [ 31.271961] ? journal_submit_commit_record+0xcb0/0xcb0 [ 31.272870] ? dequeue_task_fair+0x16d8/0x68b0 [ 31.273262] ? print_usage_bug+0x480/0x480 [ 31.273630] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 31.274122] ? ret_from_fork+0x2a/0x40 [ 31.274467] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 31.274901] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 31.275326] ? unwind_dump+0x4c0/0x4c0 [ 31.275664] ? unwind_dump+0x4c0/0x4c0 [ 31.276010] ? __unwind_start+0x169/0x330 [ 31.276381] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 31.276871] ? kthread+0x39c/0x470 [ 31.277192] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 31.277648] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 31.278088] ? unwind_dump+0x4c0/0x4c0 [ 31.278422] ? unwind_dump+0x4c0/0x4c0 [ 31.278763] ? __unwind_start+0x169/0x330 [ 31.279127] ? unwind_get_return_address+0x61/0xa0 [ 31.279561] ? kthread+0x39c/0x470 [ 31.279877] ? save_stack_trace+0x16/0x20 [ 31.280257] ? __lock_acquire+0x20f4/0x4620 [ 31.280659] ? unwind_dump+0x4c0/0x4c0 [ 31.281062] ? ret_from_fork+0x2a/0x40 [ 31.281433] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 31.281889] ? __save_stack_trace+0x6e/0xd0 [ 31.282300] ? ret_from_fork+0x2a/0x40 [ 31.282669] ? __lock_acquire+0x20f4/0x4620 [ 31.283060] ? save_stack_trace+0x16/0x20 [ 31.283511] ? __lock_acquire+0x20f4/0x4620 [ 31.283911] ? check_noncircular+0x20/0x20 [ 31.284370] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 31.284867] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 31.285367] ? lock_downgrade+0x990/0x990 [ 31.285783] ? lock_acquire+0x1d5/0x580 [ 31.286199] ? finish_task_switch+0x1aa/0x740 [ 31.286552] ? do_raw_spin_trylock+0x190/0x190 [ 31.286943] ? lock_release+0xd70/0xd70 [ 31.287273] ? compat_start_thread+0x80/0x80 [ 31.287581] ? check_noncircular+0x20/0x20 [ 31.287887] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.288212] ? check_noncircular+0x20/0x20 [ 31.288599] ? check_noncircular+0x20/0x20 [ 31.289026] ? finish_task_switch+0x1d3/0x740 [ 31.289464] ? finish_task_switch+0x1aa/0x740 [ 31.289865] ? print_usage_bug+0x480/0x480 [ 31.290348] ? check_noncircular+0x20/0x20 [ 31.290722] ? find_held_lock+0x39/0x1d0 [ 31.291115] ? lock_downgrade+0x990/0x990 [ 31.291526] ? find_held_lock+0x39/0x1d0 [ 31.291918] ? detach_if_pending+0x250/0x610 [ 31.292350] ? __next_timer_interrupt+0x150/0x150 [ 31.292824] ? do_raw_spin_trylock+0x190/0x190 [ 31.293227] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 31.294344] ? try_to_del_timer_sync+0xd1/0x120 [ 31.294731] kjournald2+0x2bf/0xbd0 [ 31.295078] ? kjournald2+0x2bf/0xbd0 [ 31.295447] ? commit_timeout+0x20/0x20 [ 31.295813] ? complete+0x18/0x80 [ 31.296134] ? schedule+0x108/0x440 [ 31.296504] ? __schedule+0x2070/0x2070 [ 31.296874] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 31.297331] ? finish_wait+0x490/0x490 [ 31.297673] ? trace_hardirqs_on+0xd/0x10 [ 31.298077] ? __kthread_parkme+0x173/0x240 [ 31.298479] kthread+0x39c/0x470 [ 31.298781] ? commit_timeout+0x20/0x20 [ 31.299149] ? kthread_create_on_node+0x100/0x100 [ 31.299580] ret_from_fork+0x2a/0x40 [ 31.300214] Dumping ftrace buffer: [ 31.300620] (ftrace buffer empty) [ 31.300929] Kernel Offset: disabled [ 31.301259] Rebooting in 86400 seconds..