[ 122.376451][ T683] bond0: (slave eth0): making interface the new active one [ 122.377283][ T683] bond0: (slave eth0): Enslaving as an active interface with an up link [ 127.157210][ T687] bond0: (slave eth0): Releasing backup interface [ 127.784983][ T690] bond0: (slave eth0): Enslaving as an active interface with an up link [ 132.466492][ T293] [ 132.466625][ T293] ============================================ [ 132.466832][ T293] WARNING: possible recursive locking detected [ 132.467031][ T293] 6.13.0-rc5-virtme #1 Not tainted [ 132.467199][ T293] -------------------------------------------- [ 132.467399][ T293] kworker/u16:2/293 is trying to acquire lock: [ 132.467599][ T293] ffffffffab7f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 132.467927][ T293] [ 132.467927][ T293] but task is already holding lock: [ 132.468170][ T293] ffffffffab7f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 132.468493][ T293] [ 132.468493][ T293] other info that might help us debug this: [ 132.468729][ T293] Possible unsafe locking scenario: [ 132.468729][ T293] [ 132.468960][ T293] CPU0 [ 132.469079][ T293] ---- [ 132.469204][ T293] lock((netdev_chain).rwsem); [ 132.469373][ T293] lock((netdev_chain).rwsem); [ 132.469534][ T293] [ 132.469534][ T293] *** DEADLOCK *** [ 132.469534][ T293] [ 132.469766][ T293] May be due to missing lock nesting notation [ 132.469766][ T293] [ 132.469997][ T293] 5 locks held by kworker/u16:2/293: [ 132.470155][ T293] #0: ffff8880010ad948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 132.470482][ T293] #1: ffffc90000ba7da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 132.470766][ T293] #2: ffffffffab7e6550 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xa50 [ 132.471049][ T293] #3: ffffffffab801dc8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 132.471378][ T293] #4: ffffffffab7f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 132.471703][ T293] [ 132.471703][ T293] stack backtrace: [ 132.471896][ T293] CPU: 3 UID: 0 PID: 293 Comm: kworker/u16:2 Not tainted 6.13.0-rc5-virtme #1 [ 132.472174][ T293] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 132.472372][ T293] Workqueue: netns cleanup_net [ 132.472541][ T293] Call Trace: [ 132.472665][ T293] [ 132.472750][ T293] dump_stack_lvl+0x82/0xd0 [ 132.472916][ T293] print_deadlock_bug+0x40a/0x650 [ 132.473081][ T293] validate_chain+0x5bf/0xae0 [ 132.473249][ T293] ? __pfx_validate_chain+0x10/0x10 [ 132.473414][ T293] ? hlock_class+0x4e/0x130 [ 132.473576][ T293] ? mark_lock+0x38/0x3e0 [ 132.473696][ T293] __lock_acquire+0xb9a/0x1680 [ 132.473860][ T293] lock_acquire.part.0+0xeb/0x330 [ 132.474018][ T293] ? blocking_notifier_call_chain+0x50/0x90 [ 132.474213][ T293] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 132.474373][ T293] ? trace_lock_acquire+0x14c/0x1f0 [ 132.474532][ T293] ? lock_acquire+0x32/0xc0 [ 132.474693][ T293] ? blocking_notifier_call_chain+0x50/0x90 [ 132.474895][ T293] down_read+0x9f/0x340 [ 132.475019][ T293] ? blocking_notifier_call_chain+0x50/0x90 [ 132.475215][ T293] ? __pfx_down_read+0x10/0x10 [ 132.475373][ T293] ? __pfx_validate_chain+0x10/0x10 [ 132.475538][ T293] ? hlock_class+0x4e/0x130 [ 132.475694][ T293] ? mark_lock+0x38/0x3e0 [ 132.475815][ T293] blocking_notifier_call_chain+0x50/0x90 [ 132.475977][ T293] netdev_lower_state_changed+0xa3/0x130 [ 132.476135][ T293] ? __pfx_netdev_lower_state_changed+0x10/0x10 [ 132.476328][ T293] ? __pfx_netdev_has_upper_dev+0x10/0x10 [ 132.476490][ T293] __bond_release_one+0xcc7/0x13f0 [ 132.476654][ T293] ? __lock_release+0x103/0x460 [ 132.476810][ T293] ? __try_to_del_timer_sync+0xe7/0x140 [ 132.476972][ T293] ? __pfx___bond_release_one+0x10/0x10 [ 132.477137][ T293] ? hlock_class+0x4e/0x130 [ 132.477293][ T293] ? mark_lock+0x38/0x3e0 [ 132.477414][ T293] ? mark_held_locks+0x9e/0xe0 [ 132.477574][ T293] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 132.477775][ T293] ? __try_to_del_timer_sync+0xe7/0x140 [ 132.477934][ T293] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 132.478143][ T293] ? mark_held_locks+0x9e/0xe0 [ 132.478304][ T293] bond_slave_netdev_event+0x73a/0x870 [ 132.478461][ T293] ? ipmr_device_event+0x3d/0x1b0 [ 132.478620][ T293] notifier_call_chain+0xcd/0x150 [ 132.478783][ T293] blocking_notifier_call_chain+0x66/0x90 [ 132.478940][ T293] unregister_netdevice_many_notify+0xa7b/0x1580 [ 132.479139][ T293] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 132.479338][ T293] ? default_device_exit_batch+0x81/0x2e0 [ 132.479497][ T293] ? rtnl_is_locked+0x15/0x20 [ 132.479657][ T293] ? unregister_netdevice_queue+0x70/0x410 [ 132.479851][ T293] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 132.480049][ T293] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 132.480251][ T293] default_device_exit_batch+0x241/0x2e0 [ 132.480493][ T293] ? __pfx_default_device_exit_batch+0x10/0x10 [ 132.480687][ T293] ? mutex_is_locked+0x1c/0x60 [ 132.480845][ T293] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 132.481045][ T293] cleanup_net+0x4ef/0xa50 [ 132.481284][ T293] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 132.481447][ T293] ? __pfx_cleanup_net+0x10/0x10 [ 132.481604][ T293] ? trace_lock_acquire+0x14c/0x1f0 [ 132.481765][ T293] ? lock_acquire+0x32/0xc0 [ 132.481997][ T293] ? process_one_work+0xe0b/0x16d0 [ 132.482160][ T293] process_one_work+0xe55/0x16d0 [ 132.482320][ T293] ? __pfx___lock_release+0x10/0x10 [ 132.482480][ T293] ? __pfx_process_one_work+0x10/0x10 [ 132.482727][ T293] ? assign_work+0x16c/0x240 [ 132.482883][ T293] worker_thread+0x58c/0xce0 [ 132.483039][ T293] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 132.483236][ T293] ? __pfx_worker_thread+0x10/0x10 [ 132.483394][ T293] ? __pfx_worker_thread+0x10/0x10 [ 132.483549][ T293] kthread+0x28a/0x350 [ 132.483669][ T293] ? __pfx_kthread+0x10/0x10 [ 132.483827][ T293] ret_from_fork+0x31/0x70 [ 132.484067][ T293] ? __pfx_kthread+0x10/0x10 [ 132.484221][ T293] ret_from_fork_asm+0x1a/0x30 [ 132.484382][ T293] [ 132.486015][ T293] bond0: (slave eth0): Releasing backup interface