[ 14.093204][ T288] bond0: (slave veth0): Enslaving as a backup interface with a down link [ 14.187907][ T289] bond0: (slave veth1): Enslaving as a backup interface with a down link [ 14.286026][ T290] br0: port 1(veth0) entered blocking state [ 14.286476][ T290] br0: port 1(veth0) entered disabled state [ 14.286784][ T290] veth0: entered allmulticast mode [ 14.288348][ T290] veth0: entered promiscuous mode [ 14.395181][ T291] br0: port 2(veth1) entered blocking state [ 14.395524][ T291] br0: port 2(veth1) entered disabled state [ 14.395766][ T291] veth1: entered allmulticast mode [ 14.397016][ T291] veth1: entered promiscuous mode [ 14.820467][ T197] br0: port 1(veth0) entered blocking state [ 14.820836][ T197] br0: port 1(veth0) entered forwarding state [ 14.823399][ T197] br0: port 2(veth1) entered blocking state [ 14.823651][ T197] br0: port 2(veth1) entered forwarding state [ 16.074982][ T11] bond0: (slave veth1): link status definitely up [ 16.075406][ T11] bond0: (slave veth1): making interface the new active one [ 16.076658][ T11] bond0: active interface up! [ 16.486604][ T70] veth1: left allmulticast mode [ 16.487016][ T70] veth1: left promiscuous mode [ 16.487390][ T70] br0: port 2(veth1) entered disabled state [ 16.491583][ T70] veth0: left allmulticast mode [ 16.491800][ T70] veth0: left promiscuous mode [ 16.492129][ T70] br0: port 1(veth0) entered disabled state [ 16.660317][ T70] [ 16.660435][ T70] ============================================ [ 16.660616][ T70] WARNING: possible recursive locking detected [ 16.660796][ T70] 6.13.0-rc5-virtme #1 Not tainted [ 16.660941][ T70] -------------------------------------------- [ 16.661118][ T70] kworker/u16:1/70 is trying to acquire lock: [ 16.661290][ T70] ffffffffb4df0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 16.661595][ T70] [ 16.661595][ T70] but task is already holding lock: [ 16.661801][ T70] ffffffffb4df0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 16.662087][ T70] [ 16.662087][ T70] other info that might help us debug this: [ 16.662293][ T70] Possible unsafe locking scenario: [ 16.662293][ T70] [ 16.662509][ T70] CPU0 [ 16.662613][ T70] ---- [ 16.662718][ T70] lock((netdev_chain).rwsem); [ 16.662864][ T70] lock((netdev_chain).rwsem); [ 16.663006][ T70] [ 16.663006][ T70] *** DEADLOCK *** [ 16.663006][ T70] [ 16.663213][ T70] May be due to missing lock nesting notation [ 16.663213][ T70] [ 16.663428][ T70] 5 locks held by kworker/u16:1/70: [ 16.663575][ T70] #0: ffff8880010ad948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 16.663870][ T70] #1: ffffc900004b7da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 16.664137][ T70] #2: ffffffffb4de6550 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xa50 [ 16.664405][ T70] #3: ffffffffb4e01dc8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 16.664803][ T70] #4: ffffffffb4df0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 16.665096][ T70] [ 16.665096][ T70] stack backtrace: [ 16.665273][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Not tainted 6.13.0-rc5-virtme #1 [ 16.665529][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.665709][ T70] Workqueue: netns cleanup_net [ 16.665864][ T70] Call Trace: [ 16.665975][ T70] [ 16.666053][ T70] dump_stack_lvl+0x82/0xd0 [ 16.666200][ T70] print_deadlock_bug+0x40a/0x650 [ 16.666350][ T70] validate_chain+0x5bf/0xae0 [ 16.666497][ T70] ? __pfx_validate_chain+0x10/0x10 [ 16.666645][ T70] ? hlock_class+0x4e/0x130 [ 16.666789][ T70] ? mark_lock+0x38/0x3e0 [ 16.666902][ T70] __lock_acquire+0xb9a/0x1680 [ 16.667055][ T70] lock_acquire.part.0+0xeb/0x330 [ 16.667203][ T70] ? blocking_notifier_call_chain+0x50/0x90 [ 16.667402][ T70] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.667553][ T70] ? trace_lock_acquire+0x14c/0x1f0 [ 16.667702][ T70] ? lock_acquire+0x32/0xc0 [ 16.667856][ T70] ? blocking_notifier_call_chain+0x50/0x90 [ 16.668036][ T70] down_read+0x9f/0x340 [ 16.668150][ T70] ? blocking_notifier_call_chain+0x50/0x90 [ 16.668343][ T70] ? __pfx_down_read+0x10/0x10 [ 16.668492][ T70] ? __pfx_validate_chain+0x10/0x10 [ 16.668643][ T70] ? hlock_class+0x4e/0x130 [ 16.668789][ T70] ? mark_lock+0x38/0x3e0 [ 16.668905][ T70] blocking_notifier_call_chain+0x50/0x90 [ 16.669051][ T70] netdev_lower_state_changed+0xa3/0x130 [ 16.669201][ T70] ? __pfx_netdev_lower_state_changed+0x10/0x10 [ 16.669383][ T70] ? __pfx_netdev_has_upper_dev+0x10/0x10 [ 16.669542][ T70] __bond_release_one+0xcc7/0x13f0 [ 16.669695][ T70] ? __lock_release+0x103/0x460 [ 16.669838][ T70] ? __try_to_del_timer_sync+0xe7/0x140 [ 16.669986][ T70] ? __pfx___bond_release_one+0x10/0x10 [ 16.670138][ T70] ? hlock_class+0x4e/0x130 [ 16.670277][ T70] ? mark_lock+0x38/0x3e0 [ 16.670388][ T70] ? mark_held_locks+0x9e/0xe0 [ 16.670530][ T70] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 16.670706][ T70] ? __try_to_del_timer_sync+0xe7/0x140 [ 16.670849][ T70] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 16.671030][ T70] ? mark_held_locks+0x9e/0xe0 [ 16.671253][ T70] bond_slave_netdev_event+0x73a/0x870 [ 16.671395][ T70] ? ipmr_device_event+0x3d/0x1b0 [ 16.671537][ T70] notifier_call_chain+0xcd/0x150 [ 16.671680][ T70] blocking_notifier_call_chain+0x66/0x90 [ 16.671896][ T70] unregister_netdevice_many_notify+0xa7b/0x1580 [ 16.672076][ T70] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 16.672251][ T70] ? default_device_exit_batch+0x81/0x2e0 [ 16.672397][ T70] ? rtnl_is_locked+0x15/0x20 [ 16.672619][ T70] ? unregister_netdevice_queue+0x70/0x410 [ 16.672799][ T70] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 16.672973][ T70] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 16.673228][ T70] default_device_exit_batch+0x241/0x2e0 [ 16.673370][ T70] ? __pfx_default_device_exit_batch+0x10/0x10 [ 16.673546][ T70] ? mutex_is_locked+0x1c/0x60 [ 16.673686][ T70] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 16.6739