[  617.368807] device bridge_slave_1 left promiscuous mode
[  617.371098] bridge0: port 2(bridge_slave_1) entered disabled state
[  617.411451] device bridge_slave_0 left promiscuous mode
[  617.413128] bridge0: port 1(bridge_slave_0) entered disabled state
[  617.520651] ------------[ cut here ]------------
[  617.521410] WARNING: CPU: 1 PID: 2049 at lib/debugobjects.c:289 debug_print_object+0x17b/0x210
[  617.522711] ODEBUG: assert_init not available (active state 0) object type: timer_list hint:           (null)
[  617.524604] Kernel panic - not syncing: panic_on_warn set ...
[  617.524604] 
[  617.526061] CPU: 1 PID: 2049 Comm: kworker/u4:3 Not tainted 4.10.0+ #1
[  617.527372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[  617.529040] Workqueue: netns cleanup_net
[  617.529859] Call Trace:
[  617.530377]  dump_stack+0xe6/0x120
[  617.531087]  ? debug_print_object+0x17b/0x210
[  617.531968]  panic+0x1b6/0x358
[  617.532604]  ? percpu_up_read_preempt_enable.constprop.41+0xb9/0xb9
[  617.533866]  ? debug_print_object+0x17b/0x210
[  617.534753]  ? debug_print_object+0x17b/0x210
[  617.535449]  __warn+0x18d/0x1b0
[  617.535868]  ? ret_from_fork+0x31/0x40
[  617.536365]  ? __internal_add_timer+0x1e0/0x1e0
[  617.536960]  warn_slowpath_fmt+0x92/0xb0
[  617.537478]  ? __warn+0x1b0/0x1b0
[  617.537926]  ? debug_object_assert_init+0xde/0x340
[  617.538557]  debug_print_object+0x17b/0x210
[  617.539141]  debug_object_assert_init+0x249/0x340
[  617.539768]  ? debug_object_free+0x350/0x350
[  617.540359]  del_timer+0x6f/0xf0
[  617.540815]  ? detach_if_pending+0x420/0x420
[  617.541411]  ? debug_object_assert_init+0x180/0x340
[  617.542103]  try_to_grab_pending+0x21f/0x5a0
[  617.542706]  __cancel_work_timer+0xae/0x440
[  617.543309]  ? cancel_delayed_work+0x10/0x10
[  617.543908]  ? debug_lockdep_rcu_enabled+0x77/0x90
[  617.544580]  ? netpoll_poll_enable+0xa9/0x170
[  617.545190]  cancel_delayed_work_sync+0xe/0x10
[  617.545812]  bond_close+0x14/0x110
[  617.546301]  __dev_close_many+0x179/0x270
[  617.546864]  ? netdev_notify_peers+0x90/0x90
[  617.547467]  ? _raw_spin_unlock_irqrestore+0xa6/0xd0
[  617.548161]  ? debug_check_no_obj_freed+0x495/0x760
[  617.548843]  dev_close_many+0x1de/0x5f0
[  617.549383]  ? dev_remove_offload+0x1a0/0x1a0
[  617.549992]  ? kernfs_put+0x2b6/0x4f0
[  617.550518]  ? rcu_lockdep_current_cpu_online+0xdc/0x130
[  617.551271]  rollback_registered_many+0x361/0xcb0
[  617.551928]  ? netif_device_attach+0x130/0x130
[  617.552549]  ? unregister_netdevice_queue+0xf5/0x240
[  617.553241]  unregister_netdevice_many+0x3e/0x200
[  617.553906]  default_device_exit_batch+0x2f9/0x3d0
[  617.554575]  ? unregister_netdevice_many+0x200/0x200
[  617.555277]  ? rtnl_unlock+0x9/0x10
[  617.555768]  ? default_device_exit+0x132/0x2c0
[  617.556390]  ? proc_readdir+0x80/0x80
[  617.556906]  ? __wake_up_sync+0x10/0x10
[  617.557447]  ? rtnl_unlock+0x9/0x10
[  617.557943]  ops_exit_list.isra.4+0xd6/0x120
[  617.558543]  cleanup_net+0x391/0x7d0
[  617.559057]  ? net_drop_ns+0x60/0x60
[  617.559561]  ? _raw_spin_unlock_irqrestore+0xa6/0xd0
[  617.560253]  ? debug_lockdep_rcu_enabled+0x77/0x90
[  617.560922]  ? rcu_lockdep_current_cpu_online+0xdc/0x130
[  617.561662]  process_one_work+0x72f/0x16a0
[  617.562236]  ? process_one_work+0x689/0x16a0
[  617.562837]  ? flush_delayed_work+0x130/0x130
[  617.563462]  worker_thread+0xe1/0x1110
[  617.563992]  kthread+0x2c9/0x3d0
[  617.564447]  ? process_one_work+0x16a0/0x16a0
[  617.565056]  ? kthread_create_on_node+0xa0/0xa0
[  617.565689]  ret_from_fork+0x31/0x40
[  617.566394] Kernel Offset: disabled
[  617.566908] Rebooting in 86400 seconds..