[ 69.607653] NOHZ: local_softirq_pending 08 [ 152.795610] NOHZ: local_softirq_pending 08 [ 172.634857] NOHZ: local_softirq_pending 08 [ 194.393199] NOHZ: local_softirq_pending 08 [ 214.244286] NOHZ: local_softirq_pending 08 [ 253.926879] NOHZ: local_softirq_pending 08 [ 254.554757] NOHZ: local_softirq_pending 08 [ 276.315931] NOHZ: local_softirq_pending 08 [ 314.717327] NOHZ: local_softirq_pending 08 [ 316.633883] NOHZ: local_softirq_pending 08 [ 480.913199] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 480.920262] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 480.928932] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 480.936389] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 480.946250] device bridge_slave_1 left promiscuous mode [ 480.952399] bridge0: port 2(bridge_slave_1) entered disabled state [ 480.992915] device bridge_slave_0 left promiscuous mode [ 480.998717] bridge0: port 1(bridge_slave_0) entered disabled state [ 481.056104] device veth1_macvtap left promiscuous mode [ 481.062401] device veth0_macvtap left promiscuous mode [ 481.067745] device veth1_vlan left promiscuous mode [ 481.073229] device veth0_vlan left promiscuous mode [ 481.215584] device hsr_slave_1 left promiscuous mode [ 481.274072] device hsr_slave_0 left promiscuous mode [ 481.334007] team0 (unregistering): Port device team_slave_1 removed [ 481.344890] team0 (unregistering): Port device team_slave_0 removed [ 481.359696] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 481.405441] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 481.470461] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts. [ 485.082886] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 485.092520] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 485.104649] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 485.112818] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 485.125577] device bridge_slave_1 left promiscuous mode [ 485.131608] bridge0: port 2(bridge_slave_1) entered disabled state [ 485.181838] device bridge_slave_0 left promiscuous mode [ 485.187836] bridge0: port 1(bridge_slave_0) entered disabled state [ 485.244867] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 485.254767] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 485.266857] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 485.286928] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 485.301768] device bridge_slave_1 left promiscuous mode [ 485.307679] bridge0: port 2(bridge_slave_1) entered disabled state [ 485.361556] device bridge_slave_0 left promiscuous mode [ 485.367507] bridge0: port 1(bridge_slave_0) entered disabled state [ 485.423704] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 485.435671] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 485.453183] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 485.464656] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 485.479686] device bridge_slave_1 left promiscuous mode [ 485.489512] bridge0: port 2(bridge_slave_1) entered disabled state [ 485.541326] device bridge_slave_0 left promiscuous mode [ 485.548595] bridge0: port 1(bridge_slave_0) entered disabled state [ 485.604332] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 485.617283] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 485.637152] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 485.648983] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 485.676809] device bridge_slave_1 left promiscuous mode [ 485.687807] bridge0: port 2(bridge_slave_1) entered disabled state [ 485.741502] device bridge_slave_0 left promiscuous mode [ 485.750524] bridge0: port 1(bridge_slave_0) entered disabled state [ 485.804310] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 485.817127] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 485.836992] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 485.847787] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 485.864029] device bridge_slave_1 left promiscuous mode [ 485.871472] bridge0: port 2(bridge_slave_1) entered disabled state [ 485.930688] device bridge_slave_0 left promiscuous mode [ 485.937916] bridge0: port 1(bridge_slave_0) entered disabled state [ 486.021415] device veth1_macvtap left promiscuous mode [ 486.028634] device veth0_macvtap left promiscuous mode [ 486.038696] device veth1_vlan left promiscuous mode [ 486.047013] device veth0_vlan left promiscuous mode [ 486.057507] device veth1_macvtap left promiscuous mode [ 486.066550] device veth0_macvtap left promiscuous mode [ 486.076904] device veth1_vlan left promiscuous mode [ 486.087047] device veth0_vlan left promiscuous mode [ 486.097385] device veth1_macvtap left promiscuous mode [ 486.106373] device veth0_macvtap left promiscuous mode [ 486.116524] device veth1_vlan left promiscuous mode [ 486.125156] device veth0_vlan left promiscuous mode [ 486.136228] device veth1_macvtap left promiscuous mode [ 486.144959] device veth0_macvtap left promiscuous mode [ 486.155009] device veth1_vlan left promiscuous mode [ 486.163336] device veth0_vlan left promiscuous mode [ 486.169563] device veth1_macvtap left promiscuous mode [ 486.179904] device veth0_macvtap left promiscuous mode [ 486.188935] device veth1_vlan left promiscuous mode [ 486.198867] device veth0_vlan left promiscuous mode [ 487.006312] device hsr_slave_1 left promiscuous mode [ 487.066692] device hsr_slave_0 left promiscuous mode [ 487.137095] team0 (unregistering): Port device team_slave_1 removed [ 487.154885] team0 (unregistering): Port device team_slave_0 removed [ 487.176115] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 487.229780] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 487.373796] bond0 (unregistering): Released all slaves [ 487.583566] device hsr_slave_1 left promiscuous mode [ 487.628573] device hsr_slave_0 left promiscuous mode [ 487.698721] team0 (unregistering): Port device team_slave_1 removed [ 487.729936] team0 (unregistering): Port device team_slave_0 removed [ 487.755335] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 487.819547] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 487.933980] bond0 (unregistering): Released all slaves [ 488.135945] device hsr_slave_1 left promiscuous mode [ 488.195565] device hsr_slave_0 left promiscuous mode [ 488.297795] team0 (unregistering): Port device team_slave_1 removed [ 488.315729] team0 (unregistering): Port device team_slave_0 removed [ 488.347799] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 488.400008] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 488.514656] bond0 (unregistering): Released all slaves [ 488.730214] device hsr_slave_1 left promiscuous mode [ 488.788455] device hsr_slave_0 left promiscuous mode [ 488.859975] team0 (unregistering): Port device team_slave_1 removed [ 488.887526] team0 (unregistering): Port device team_slave_0 removed [ 488.909279] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 488.979140] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 489.103802] bond0 (unregistering): Released all slaves [ 489.275160] device hsr_slave_1 left promiscuous mode [ 489.335720] device hsr_slave_0 left promiscuous mode [ 489.416395] team0 (unregistering): Port device team_slave_1 removed [ 489.447085] team0 (unregistering): Port device team_slave_0 removed [ 489.467725] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 489.516265] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 489.633822] bond0 (unregistering): Released all slaves [ 490.132230] ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 [ 490.143683] ------------[ cut here ]------------ [ 490.148539] WARNING: CPU: 0 PID: 8059 at lib/debugobjects.c:291 debug_print_object.cold.14+0xa7/0xdb [ 490.157819] Kernel panic - not syncing: panic_on_warn set ... [ 490.157819] [ 490.165178] CPU: 0 PID: 8059 Comm: kworker/u4:6 Not tainted 4.14.0-rc4-syzkaller #0 [ 490.172962] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 490.182322] Workqueue: netns cleanup_net [ 490.186372] Call Trace: [ 490.188951] dump_stack+0x145/0x1e1 [ 490.192588] ? arch_local_irq_restore+0x43/0x43 [ 490.197259] ? debug_print_object.cold.14+0xa7/0xdb [ 490.202634] ? debug_print_object.cold.14+0xa7/0xdb [ 490.207640] panic+0x1a9/0x34e [ 490.210831] ? add_taint.cold.5+0x11/0x11 [ 490.214987] ? debug_print_object.cold.14+0xa7/0xdb [ 490.220029] __warn.cold.8+0x11a/0x156 [ 490.223906] ? debug_print_object.cold.14+0xa7/0xdb [ 490.228909] report_bug+0x1a3/0x227 [ 490.232549] ? fixup_exception+0x3b/0xb3 [ 490.236610] do_trap+0x1ef/0x2d0 [ 490.240026] do_error_trap+0x11f/0x390 [ 490.243911] ? wake_up_klogd+0x140/0x140 [ 490.247960] ? math_error+0x3f0/0x3f0 [ 490.251860] ? vprintk_emit+0x292/0x4e0 [ 490.255820] ? debug_print_object.cold.14+0xa7/0xdb [ 490.260828] ? vprintk_emit+0x29b/0x4e0 [ 490.264793] ? work_on_cpu_safe+0x60/0x60 [ 490.268933] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 490.273761] ? work_on_cpu_safe+0x60/0x60 [ 490.277902] do_invalid_op+0x1b/0x20 [ 490.281608] invalid_op+0x18/0x20 [ 490.285051] RIP: 0010:debug_print_object.cold.14+0xa7/0xdb [ 490.290674] RSP: 0018:ffff88010da7ea58 EFLAGS: 00010082 [ 490.296037] RAX: 0000000000000061 RBX: 0000000000000003 RCX: 0000000000000000 [ 490.303298] RDX: 0000000000000061 RSI: ffffffff878bd580 RDI: ffffed0021b4fd42 [ 490.310561] RBP: ffff88010da7ea80 R08: 1ffff10021b4fcd9 R09: ffff88010bb42440 [ 490.318696] R10: 0000000000000000 R11: dffffc0000000000 R12: ffffffff878b8780 [ 490.325966] R13: ffffffff81453770 R14: 0000000000000000 R15: ffff88010da7ec28 [ 490.333328] ? work_on_cpu_safe+0x60/0x60 [ 490.337477] ? debug_print_object.cold.14+0xa7/0xdb [ 490.342497] debug_check_no_obj_freed+0x643/0xcc3 [ 490.347344] ? free_obj_work+0x620/0x620 [ 490.351403] ? __lock_is_held+0xb8/0x140 [ 490.355463] ? rcu_dynticks_eqs_exit+0x70/0x70 [ 490.360061] ? debug_check_no_locks_freed+0x208/0x310 [ 490.365345] kfree+0xbd/0x270 [ 490.368442] kvfree+0x2c/0x30 [ 490.371540] netdev_freemem+0x47/0x60 [ 490.375341] netdev_release+0x6a/0x80 [ 490.379187] device_release+0x134/0x170 [ 490.383150] kobject_put+0x107/0x1b0 [ 490.386863] netdev_run_todo+0x883/0xb70 [ 490.390916] ? register_netdev+0x30/0x30 [ 490.395073] ? __lock_is_held+0xb8/0x140 [ 490.399149] ? synchronize_rcu_expedited+0x35/0xb0 [ 490.404158] ? synchronize_net+0x25/0x30 [ 490.409953] ? rollback_registered_many+0x8e4/0xe90 [ 490.414962] ? dev_fill_metadata_dst+0x630/0x630 [ 490.419729] ? __lock_is_held+0xb8/0x140 [ 490.423787] ? rcu_dynticks_eqs_exit+0x70/0x70 [ 490.428721] ? kernfs_put+0x386/0x660 [ 490.432524] ? kmem_cache_free+0x25f/0x2d0 [ 490.436755] ? unregister_netdevice_queue+0x1ac/0x570 [ 490.441953] ? unregister_netdevice_many+0x248/0x4a0 [ 490.447055] ? unregister_netdev+0x20/0x20 [ 490.451291] ? sysfs_remove_group+0xc3/0x100 [ 490.456038] ? br_dev_delete+0x11f/0x180 [ 490.460105] rtnl_unlock+0x9/0x10 [ 490.463546] default_device_exit_batch+0x3d0/0x500 [ 490.468476] ? unregister_netdevice_many+0x4a0/0x4a0 [ 490.473578] ? rtnl_unlock+0x9/0x10 [ 490.477203] ? default_device_exit+0x1cc/0x2a0 [ 490.482041] ? ipip_exit_net+0x17a/0x260 [ 490.486098] ? __init_waitqueue_head+0x140/0x140 [ 490.491316] ? rtnl_unlock+0x9/0x10 [ 490.494931] ops_exit_list.isra.8+0xd3/0x120 [ 490.499339] cleanup_net+0x55b/0xaa0 [ 490.503140] ? net_drop_ns+0x20/0x20 [ 490.506846] ? lock_downgrade+0x830/0x830 [ 490.510991] ? lock_acquire+0x1e5/0x540 [ 490.515823] ? debug_object_deactivate+0xe5/0x410 [ 490.520656] ? find_held_lock+0x3a/0x1d0 [ 490.525162] ? copy_trace+0x140/0x140 [ 490.528959] ? lock_acquire+0x1e5/0x540 [ 490.533106] ? process_one_work+0x92e/0x1a80 [ 490.537514] ? __lock_is_held+0xb8/0x140 [ 490.541572] ? rcu_dynticks_eqs_exit+0x70/0x70 [ 490.546156] process_one_work+0x9f7/0x1a80 [ 490.550394] ? pwq_dec_nr_in_flight+0x510/0x510 [ 490.555056] ? finish_task_switch+0x1d0/0x770 [ 490.559547] ? preempt_notifier_dec+0x20/0x20 [ 490.564051] ? __schedule+0x829/0x1fe0 [ 490.567926] ? __sched_text_start+0x8/0x8 [ 490.572076] ? __sched_text_start+0x8/0x8 [ 490.576759] ? find_held_lock+0x3a/0x1d0 [ 490.580823] ? lock_acquire+0x1e5/0x540 [ 490.585411] ? worker_thread+0x45e/0x1820 [ 490.589560] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 490.594429] ? lock_release+0xdc0/0xdc0 [ 490.598408] ? do_raw_spin_unlock+0x1ec/0x2d0 [ 490.602908] ? do_raw_spin_trylock+0x190/0x190 [ 490.607495] worker_thread+0x215/0x1820 [ 490.611470] ? process_one_work+0x1a80/0x1a80 [ 490.616162] ? do_raw_spin_trylock+0x190/0x190 [ 490.620741] ? _raw_spin_unlock_irq+0x27/0x80 [ 490.625239] ? trace_hardirqs_on_caller+0x40c/0x580 [ 490.630247] ? _raw_spin_unlock_irq+0x60/0x80 [ 490.634749] ? finish_task_switch+0x1f9/0x770 [ 490.639679] ? finish_task_switch+0x1d0/0x770 [ 490.644350] ? preempt_notifier_dec+0x20/0x20 [ 490.648851] ? __schedule+0x829/0x1fe0 [ 490.652739] ? copy_trace+0x140/0x140 [ 490.656544] ? find_held_lock+0x3a/0x1d0 [ 490.660696] ? find_held_lock+0x3a/0x1d0 [ 490.664773] ? lock_downgrade+0x830/0x830 [ 490.668928] ? __schedule+0x1fe0/0x1fe0 [ 490.672900] ? wait_woken+0x280/0x280 [ 490.677667] ? do_raw_spin_unlock+0x1ec/0x2d0 [ 490.682162] ? do_raw_spin_trylock+0x190/0x190 [ 490.686740] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 490.691843] ? trace_hardirqs_on_caller+0x40c/0x580 [ 490.696946] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 490.702052] kthread+0x376/0x440 [ 490.705435] ? process_one_work+0x1a80/0x1a80 [ 490.710038] ? kthread_create_on_node+0xa0/0xa0 [ 490.714963] ret_from_fork+0x2a/0x40 [ 490.718791] [ 490.718792] ====================================================== [ 490.718794] WARNING: possible circular locking dependency detected [ 490.718795] 4.14.0-rc4-syzkaller #0 Not tainted [ 490.718796] ------------------------------------------------------ [ 490.718798] kworker/u4:6/8059 is trying to acquire lock: [ 490.718799] ((console_sem).lock){..-.}, at: [] down_trylock+0x13/0x70 [ 490.718803] [ 490.718804] but task is already holding lock: [ 490.718805] (&obj_hash[i].lock){-.-.}, at: [] debug_check_no_obj_freed+0x1df/0xcc3 [ 490.718809] [ 490.718810] which lock already depends on the new lock. [ 490.718811] [ 490.718812] [ 490.718814] the existing dependency chain (in reverse order) is: [ 490.718814] [ 490.718815] -> #3 (&obj_hash[i].lock){-.-.}: [ 490.718820] __lock_acquire+0x26dd/0x41b0 [ 490.718821] lock_acquire+0x1e5/0x540 [ 490.718822] _raw_spin_lock_irqsave+0x99/0xc2 [ 490.718824] __debug_object_init+0x108/0x10e0 [ 490.718825] debug_object_init+0x16/0x20 [ 490.718826] hrtimer_init+0x84/0x3e0 [ 490.718827] init_dl_task_timer+0x1b/0x50 [ 490.718828] __sched_fork+0x2bc/0xc00 [ 490.718829] init_idle+0x75/0x810 [ 490.718831] sched_init+0xc39/0xd5e [ 490.718832] start_kernel+0x333/0x68d [ 490.718833] x86_64_start_reservations+0x29/0x2b [ 490.718834] x86_64_start_kernel+0x76/0x79 [ 490.718835] verify_cpu+0x0/0xfb [ 490.718836] [ 490.718837] -> #2 (&rq->lock){-.-.}: [ 490.718841] __lock_acquire+0x26dd/0x41b0 [ 490.718842] lock_acquire+0x1e5/0x540 [ 490.718843] _raw_spin_lock+0x2d/0x40 [ 490.718845] task_fork_fair+0xa9/0x8a0 [ 490.718846] sched_fork+0x441/0xe60 [ 490.718847] copy_process.part.34+0x1ad4/0x4d80 [ 490.718848] _do_fork+0x19b/0xe70 [ 490.718849] kernel_thread+0x24/0x30 [ 490.718850] rest_init+0x1d/0xe0 [ 490.718852] start_kernel+0x668/0x68d [ 490.718853] x86_64_start_reservations+0x29/0x2b [ 490.718854] x86_64_start_kernel+0x76/0x79 [ 490.718855] verify_cpu+0x0/0xfb [ 490.718856] [ 490.718857] -> #1 (&p->pi_lock){-.-.}: [ 490.718861] __lock_acquire+0x26dd/0x41b0 [ 490.718862] lock_acquire+0x1e5/0x540 [ 490.718863] _raw_spin_lock_irqsave+0x99/0xc2 [ 490.718864] try_to_wake_up+0xca/0x1230 [ 490.718866] wake_up_process+0x10/0x20 [ 490.718867] __up.isra.1+0x1b8/0x290 [ 490.718868] up+0x12f/0x1b0 [ 490.718869] __up_console_sem+0xa0/0x150 [ 490.718870] console_unlock+0x57b/0xde0 [ 490.718871] vprintk_emit+0x29b/0x4e0 [ 490.718873] vprintk_default+0x1a/0x20 [ 490.718874] vprintk_func+0x2c/0xf2 [ 490.718875] printk+0x91/0xab [ 490.718876] do_exit.cold.21+0x56/0x1d2 [ 490.718877] do_group_exit+0x135/0x3b0 [ 490.718878] SyS_exit_group+0x18/0x20 [ 490.718880] entry_SYSCALL_64_fastpath+0x23/0xc2 [ 490.718880] [ 490.718881] -> #0 ((console_sem).lock){..-.}: [ 490.718885] check_prev_add+0xc4d/0x15a0 [ 490.718887] __lock_acquire+0x26dd/0x41b0 [ 490.718888] lock_acquire+0x1e5/0x540 [ 490.718889] _raw_spin_lock_irqsave+0x99/0xc2 [ 490.718890] down_trylock+0x13/0x70 [ 490.718891] __down_trylock_console_sem+0x93/0x190 [ 490.718893] console_trylock+0x12/0x110 [ 490.718894] vprintk_emit+0x292/0x4e0 [ 490.718895] vprintk_default+0x1a/0x20 [ 490.718896] vprintk_func+0x2c/0xf2 [ 490.718897] printk+0x91/0xab [ 490.718899] debug_print_object.cold.14+0xa7/0xdb [ 490.718900] debug_check_no_obj_freed+0x643/0xcc3 [ 490.718901] kfree+0xbd/0x270 [ 490.718902] kvfree+0x2c/0x30 [ 490.718903] netdev_freemem+0x47/0x60 [ 490.718904] netdev_release+0x6a/0x80 [ 490.718905] device_release+0x134/0x170 [ 490.718907] kobject_put+0x107/0x1b0 [ 490.718908] netdev_run_todo+0x883/0xb70 [ 490.718909] rtnl_unlock+0x9/0x10 [ 490.718910] default_device_exit_batch+0x3d0/0x500 [ 490.718911] ops_exit_list.isra.8+0xd3/0x120 [ 490.718913] cleanup_net+0x55b/0xaa0 [ 490.718914] process_one_work+0x9f7/0x1a80 [ 490.718915] worker_thread+0x215/0x1820 [ 490.718916] kthread+0x376/0x440 [ 490.718917] ret_from_fork+0x2a/0x40 [ 490.718918] [ 490.718919] other info that might help us debug this: [ 490.718920] [ 490.718921] Chain exists of: [ 490.718922] (console_sem).lock --> &rq->lock --> &obj_hash[i].lock [ 490.718927] [ 490.718929] Possible unsafe locking scenario: [ 490.718929] [ 490.718931] CPU0 CPU1 [ 490.718932] ---- ---- [ 490.718932] lock(&obj_hash[i].lock); [ 490.718935] lock(&rq->lock); [ 490.718938] lock(&obj_hash[i].lock); [ 490.718941] lock((console_sem).lock); [ 490.718943] [ 490.718944] *** DEADLOCK *** [ 490.718945] [ 490.718946] 4 locks held by kworker/u4:6/8059: [ 490.718947] #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x8e3/0x1a80 [ 490.718951] #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x92e/0x1a80 [ 490.718956] #2: (net_mutex){+.+.}, at: [] cleanup_net+0x235/0xaa0 [ 490.718960] #3: (&obj_hash[i].lock){-.-.}, at: [] debug_check_no_obj_freed+0x1df/0xcc3 [ 490.718964] [ 490.718965] stack backtrace: [ 490.718967] CPU: 0 PID: 8059 Comm: kworker/u4:6 Not tainted 4.14.0-rc4-syzkaller #0 [ 490.718969] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 490.718970] Workqueue: netns cleanup_net [ 490.718972] Call Trace: [ 490.718973] dump_stack+0x145/0x1e1 [ 490.718974] ? arch_local_irq_restore+0x43/0x43 [ 490.718976] ? print_lock+0x9d/0xa0 [ 490.718977] print_circular_bug.cold.67+0x217/0x386 [ 490.718978] check_prev_add+0xc4d/0x15a0 [ 490.718979] ? graph_lock+0x160/0x160 [ 490.718981] ? check_usage+0x720/0x720 [ 490.718982] ? pointer+0xc20/0xc20 [ 490.718983] ? sprintf+0x95/0xb0 [ 490.718984] __lock_acquire+0x26dd/0x41b0 [ 490.718985] ? graph_lock+0x160/0x160 [ 490.718986] ? debug_check_no_locks_freed+0x310/0x310 [ 490.718988] ? string+0x19c/0x310 [ 490.718989] ? widen_string+0x1c0/0x1c0 [ 490.718990] ? unwind_get_return_address+0x61/0xa0 [ 490.718991] ? __save_stack_trace+0x61/0xd0 [ 490.718992] ? symbol_string+0xe6/0x170 [ 490.718994] ? flags_string+0x2d0/0x2d0 [ 490.718995] ? save_stack_trace+0x16/0x20 [ 490.718996] ? debug_check_no_locks_freed+0x310/0x310 [ 490.718997] ? copy_trace+0x140/0x140 [ 490.718998] ? debug_check_no_locks_freed+0x310/0x310 [ 490.719000] ? worker_detach_from_pool+0x500/0x500 [ 490.719001] ? format_decode+0x700/0x700 [ 490.719002] ? do_raw_spin_unlock+0x1ec/0x2d0 [ 490.719003] lock_acquire+0x1e5/0x540 [ 490.719005] ? down_trylock+0x13/0x70 [ 490.719006] ? lock_release+0xdc0/0xdc0 [ 490.719007] ? kvm_clock_read+0x23/0x40 [ 490.719008] ? kvm_sched_clock_read+0x9/0x20 [ 490.719009] ? sched_clock+0x31/0x40 [ 490.719011] ? sched_clock_cpu+0x1b/0x1c0 [ 490.719012] ? vprintk_emit+0x292/0x4e0 [ 490.719013] _raw_spin_lock_irqsave+0x99/0xc2 [ 490.719014] ? down_trylock+0x13/0x70 [ 490.719015] down_trylock+0x13/0x70 [ 490.719016] ? vprintk_emit+0x292/0x4e0 [ 490.719018] __down_trylock_console_sem+0x93/0x190 [ 490.719019] console_trylock+0x12/0x110 [ 490.719020] vprintk_emit+0x292/0x4e0 [ 490.719021] ? work_on_cpu_safe+0x60/0x60 [ 490.719022] vprintk_default+0x1a/0x20 [ 490.719023] vprintk_func+0x2c/0xf2 [ 490.719024] printk+0x91/0xab [ 490.719026] ? log_store.cold.31+0x22/0x22 [ 490.719027] ? free_object+0x1bc/0x230 [ 490.719028] ? debug_object_active_state+0x4e0/0x4e0 [ 490.719029] ? work_on_cpu_safe+0x60/0x60 [ 490.719031] debug_print_object.cold.14+0xa7/0xdb [ 490.719032] debug_check_no_obj_freed+0x643/0xcc3 [ 490.719033] ? free_obj_work+0x620/0x620 [ 490.719034] ? __lock_is_held+0xb8/0x140 [ 490.719035] ? rcu_dynticks_eqs_exit+0x70/0x70 [ 490.719037] ? debug_check_no_locks_freed+0x208/0x310 [ 490.719038] kfree+0xbd/0x270 [ 490.719039] kvfree+0x2c/0x30 [ 490.719040] netdev_freemem+0x47/0x60 [ 490.719041] netdev_release+0x6a/0x80 [ 490.719042] device_release+0x134/0x170 [ 490.719043] kobject_put+0x107/0x1b0 [ 490.719045] netdev_run_todo+0x883/0xb70 [ 490.719046] ? register_netdev+0x30/0x30 [ 490.719047] ? __lock_is_held+0xb8/0x140 [ 490.719048] ? synchronize_rcu_expedited+0x35/0xb0 [ 490.719049] ? synchronize_net+0x25/0x30 [ 490.719051] ? rollback_registered_many+0x8e4/0xe90 [ 490.719052] ? dev_fill_metadata_dst+0x630/0x630 [ 490.719053] ? __lock_is_held+0xb8/0x140 [ 490.719054] ? rcu_dynticks_eqs_exit+0x70/0x70 [ 490.719055] ? kernfs_put+0x386/0x660 [ 490.719057] ? kmem_cache_free+0x25f/0x2d0 [ 490.719058] ? unregister_netdevice_queue+0x1ac/0x570 [ 490.719059] ? unregister_netdevice_many+0x248/0x4a0 [ 490.719060] ? unregister_netdev+0x20/0x20 [ 490.719062] ? sysfs_remove_group+0xc3/0x100 [ 490.719063] ? br_dev_delete+0x11f/0x180 [ 490.719064] rtnl_unlock+0x9/0x10 [ 490.719065] default_device_exit_batch+0x3d0/0x500 [ 490.719067] ? unregister_netdevice_many+0x4a0/0x4a0 [ 490.719068] ? rtnl_unlock+0x9/0x10 [ 490.719069] ? default_device_exit+0x1cc/0x2a0 [ 490.719070] ? ipip_exit_net+0x17a/0x260 [ 490.719071] ? __init_waitqueue_head+0x140/0x140 [ 490.719072] ? rtnl_unlock+0x9/0x10 [ 490.719074] ops_exit_list.isra.8+0xd3/0x120 [ 490.719075] cleanup_net+0x55b/0xaa0 [ 490.719076] ? net_drop_ns+0x20/0x20 [ 490.719077] ? lock_downgrade+0x830/0x830 [ 490.719078] ? lock_acquire+0x1e5/0x540 [ 490.719080] ? debug_object_deactivate+0xe5/0x410 [ 490.719081] ? find_held_lock+0x3a/0x1d0 [ 490.719082] ? copy_trace+0x140/0x140 [ 490.719083] ? lock_acquire+0x1e5/0x540 [ 490.719084] ? process_one_work+0x92e/0x1a80 [ 490.719085] ? __lock_is_held+0xb8/0x140 [ 490.719087] ? rcu_dynticks_eqs_exit+0x70/0x70 [ 490.719088] process_one_work+0x9f7/0x1a80 [ 490.719089] ? pwq_dec_nr_in_flight+0x510/0x510 [ 490.719090] ? finish_task_switch+0x1d0/0x770 [ 490.719092] ? preempt_notifier_dec+0x20/0x20 [ 490.719093] ? __schedule+0x829/0x1fe0 [ 490.719094] ? __sched_text_start+0x8/0x8 [ 490.719095] ? __sched_text_start+0x8/0x8 [ 490.719096] ? find_held_lock+0x3a/0x1d0 [ 490.719097] ? lock_acquire+0x1e5/0x540 [ 490.719099] ? worker_thread+0x45e/0x1820 [ 490.719100] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 490.719101] ? lock_release+0xdc0/0xdc0 [ 490.719102] ? do_raw_spin_unlock+0x1ec/0x2d0 [ 490.719103] ? do_raw_spin_trylock+0x190/0x190 [ 490.719105] worker_thread+0x215/0x1820 [ 490.719106] ? process_one_work+0x1a80/0x1a80 [ 490.719107] ? do_raw_spin_trylock+0x190/0x190 [ 490.719108] ? _raw_spin_unlock_irq+0x27/0x80 [ 490.719110] ? trace_hardirqs_on_caller+0x40c/0x580 [ 490.719111] ? _raw_spin_unlock_irq+0x60/0x80 [ 490.719112] ? finish_task_switch+0x1f9/0x770 [ 490.719113] ? finish_task_switch+0x1d0/0x770 [ 490.719114] ? preempt_notifier_dec+0x20/0x20 [ 490.719115] ? __schedule+0x829/0x1fe0 [ 490.719116] ? copy_t [ 490.719120] Lost 14 message(s)! [ 490.720774] Kernel Offset: disabled [ 491.795108] Rebooting in 86400 seconds..