[ 10.912602][ T238] bond0: (slave eth0): making interface the new active one [ 10.913577][ T238] bond0: (slave eth0): Enslaving as an active interface with an up link [ 15.663768][ T242] bond0: (slave eth0): Releasing backup interface [ 15.842203][ T243] ip (243) used greatest stack depth: 23680 bytes left [ 16.139851][ T245] bond0: (slave eth0): Enslaving as an active interface with an up link [ 20.760480][ T11] [ 20.760598][ T11] ============================================ [ 20.760786][ T11] WARNING: possible recursive locking detected [ 20.760965][ T11] 6.13.0-rc5-virtme #1 Not tainted [ 20.761102][ T11] -------------------------------------------- [ 20.761300][ T11] kworker/u16:0/11 is trying to acquire lock: [ 20.761479][ T11] ffffffffbb5f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 20.761770][ T11] [ 20.761770][ T11] but task is already holding lock: [ 20.761975][ T11] ffffffffbb5f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 20.762265][ T11] [ 20.762265][ T11] other info that might help us debug this: [ 20.762479][ T11] Possible unsafe locking scenario: [ 20.762479][ T11] [ 20.762688][ T11] CPU0 [ 20.762795][ T11] ---- [ 20.762906][ T11] lock((netdev_chain).rwsem); [ 20.763044][ T11] lock((netdev_chain).rwsem); [ 20.763190][ T11] [ 20.763190][ T11] *** DEADLOCK *** [ 20.763190][ T11] [ 20.763393][ T11] May be due to missing lock nesting notation [ 20.763393][ T11] [ 20.763606][ T11] 5 locks held by kworker/u16:0/11: [ 20.763750][ T11] #0: ffff8880010ad948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 20.764044][ T11] #1: ffffc900000b7da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 20.764296][ T11] #2: ffffffffbb5e6550 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xa50 [ 20.764548][ T11] #3: ffffffffbb601dc8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 20.764835][ T11] #4: ffffffffbb5f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 20.765123][ T11] [ 20.765123][ T11] stack backtrace: [ 20.765297][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.13.0-rc5-virtme #1 [ 20.765558][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.765741][ T11] Workqueue: netns cleanup_net [ 20.765896][ T11] Call Trace: [ 20.766008][ T11] [ 20.766086][ T11] dump_stack_lvl+0x82/0xd0 [ 20.766252][ T11] print_deadlock_bug+0x40a/0x650 [ 20.766399][ T11] validate_chain+0x5bf/0xae0 [ 20.766547][ T11] ? __pfx_validate_chain+0x10/0x10 [ 20.766689][ T11] ? hlock_class+0x4e/0x130 [ 20.766839][ T11] ? mark_lock+0x38/0x3e0 [ 20.766955][ T11] __lock_acquire+0xb9a/0x1680 [ 20.767099][ T11] ? mark_lock_irq+0x9b1/0xa10 [ 20.767255][ T11] lock_acquire.part.0+0xeb/0x330 [ 20.767400][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 20.767576][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.767719][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 20.767861][ T11] ? lock_acquire+0x32/0xc0 [ 20.768000][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 20.768181][ T11] down_read+0x9f/0x340 [ 20.768291][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 20.768480][ T11] ? __pfx_down_read+0x10/0x10 [ 20.768624][ T11] ? __pfx_validate_chain+0x10/0x10 [ 20.768767][ T11] ? hlock_class+0x4e/0x130 [ 20.768913][ T11] ? mark_lock+0x38/0x3e0 [ 20.769040][ T11] blocking_notifier_call_chain+0x50/0x90 [ 20.769186][ T11] netdev_lower_state_changed+0xa3/0x130 [ 20.769327][ T11] ? __pfx_netdev_lower_state_changed+0x10/0x10 [ 20.769502][ T11] ? __pfx_netdev_has_upper_dev+0x10/0x10 [ 20.769656][ T11] __bond_release_one+0xcc7/0x13f0 [ 20.769805][ T11] ? __lock_release+0x103/0x460 [ 20.769951][ T11] ? __try_to_del_timer_sync+0xe7/0x140 [ 20.770101][ T11] ? __pfx___bond_release_one+0x10/0x10 [ 20.770250][ T11] ? hlock_class+0x4e/0x130 [ 20.770395][ T11] ? mark_lock+0x38/0x3e0 [ 20.770504][ T11] ? mark_held_locks+0x9e/0xe0 [ 20.770645][ T11] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 20.770827][ T11] ? __try_to_del_timer_sync+0xe7/0x140 [ 20.770975][ T11] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 20.771150][ T11] ? mark_held_locks+0x9e/0xe0 [ 20.771302][ T11] bond_slave_netdev_event+0x73a/0x870 [ 20.771451][ T11] ? ipmr_device_event+0x3d/0x1b0 [ 20.771597][ T11] notifier_call_chain+0xcd/0x150 [ 20.771740][ T11] blocking_notifier_call_chain+0x66/0x90 [ 20.771882][ T11] unregister_netdevice_many_notify+0xa7b/0x1580 [ 20.772061][ T11] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 20.772235][ T11] ? default_device_exit_batch+0x81/0x2e0 [ 20.772379][ T11] ? rtnl_is_locked+0x15/0x20 [ 20.772529][ T11] ? unregister_netdevice_queue+0x70/0x410 [ 20.772708][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 20.772887][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 20.773074][ T11] default_device_exit_batch+0x241/0x2e0 [ 20.773221][ T11] ? __pfx_default_device_exit_batch+0x10/0x10 [ 20.773396][ T11] ? mutex_is_locked+0x1c/0x60 [ 20.773538][ T11] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 20.773719][ T11] cleanup_net+0x4ef/0xa50 [ 20.773865][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.774014][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 20.774154][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 20.774310][ T11] ? lock_acquire+0x32/0xc0 [ 20.774457][ T11] ? process_one_work+0xe0b/0x16d0 [ 20.774607][ T11] process_one_work+0xe55/0x16d0 [ 20.774750][ T11] ? __pfx___lock_release+0x10/0x10 [ 20.774902][ T11] ? __pfx_process_one_work+0x10/0x10 [ 20.775046][ T11] ? assign_work+0x16c/0x240 [ 20.775185][ T11] worker_thread+0x58c/0xce0 [ 20.775334][ T11] ? __pfx_worker_thread+0x10/0x10 [ 20.775479][ T11] kthread+0x28a/0x350 [ 20.775586][ T11] ? __pfx_kthread+0x10/0x10 [ 20.775755][ T11] ret_from_fork+0x31/0x70 [ 20.775897][ T11] ? __pfx_kthread+0x10/0x10 [ 20.776037][ T11] ret_from_fork_asm+0x1a/0x30 [ 20.776182][ T11] [ 20.776647][ T11] bond0: (slave eth0): Releasing backup interface