[ 122.518428][ T684] bond0: (slave eth0): making interface the new active one [ 122.519338][ T684] bond0: (slave eth0): Enslaving as an active interface with an up link [ 127.298061][ T688] bond0: (slave eth0): Releasing backup interface [ 127.880844][ T691] bond0: (slave eth0): Enslaving as an active interface with an up link [ 132.496494][ T269] [ 132.496645][ T269] ============================================ [ 132.496852][ T269] WARNING: possible recursive locking detected [ 132.497042][ T269] 6.13.0-rc5-virtme #1 Not tainted [ 132.497207][ T269] -------------------------------------------- [ 132.497393][ T269] kworker/u16:2/269 is trying to acquire lock: [ 132.497577][ T269] ffffffff8a9f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 132.497895][ T269] [ 132.497895][ T269] but task is already holding lock: [ 132.498119][ T269] ffffffff8a9f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 132.498427][ T269] [ 132.498427][ T269] other info that might help us debug this: [ 132.498654][ T269] Possible unsafe locking scenario: [ 132.498654][ T269] [ 132.498891][ T269] CPU0 [ 132.499042][ T269] ---- [ 132.499182][ T269] lock((netdev_chain).rwsem); [ 132.499370][ T269] lock((netdev_chain).rwsem); [ 132.499597][ T269] [ 132.499597][ T269] *** DEADLOCK *** [ 132.499597][ T269] [ 132.499930][ T269] May be due to missing lock nesting notation [ 132.499930][ T269] [ 132.500226][ T269] 5 locks held by kworker/u16:2/269: [ 132.500420][ T269] #0: ffff8880010ad948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 132.500809][ T269] #1: ffffc90000bf7da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 132.501134][ T269] #2: ffffffff8a9e6550 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xa50 [ 132.501408][ T269] #3: ffffffff8aa01dc8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 132.501720][ T269] #4: ffffffff8a9f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 132.502033][ T269] [ 132.502033][ T269] stack backtrace: [ 132.502232][ T269] CPU: 2 UID: 0 PID: 269 Comm: kworker/u16:2 Not tainted 6.13.0-rc5-virtme #1 [ 132.502492][ T269] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 132.502685][ T269] Workqueue: netns cleanup_net [ 132.502853][ T269] Call Trace: [ 132.502972][ T269] [ 132.503055][ T269] dump_stack_lvl+0x82/0xd0 [ 132.503222][ T269] print_deadlock_bug+0x40a/0x650 [ 132.503381][ T269] validate_chain+0x5bf/0xae0 [ 132.503538][ T269] ? __pfx_validate_chain+0x10/0x10 [ 132.503693][ T269] ? hlock_class+0x4e/0x130 [ 132.503852][ T269] ? mark_lock+0x38/0x3e0 [ 132.503978][ T269] __lock_acquire+0xb9a/0x1680 [ 132.504164][ T269] lock_acquire.part.0+0xeb/0x330 [ 132.504342][ T269] ? blocking_notifier_call_chain+0x50/0x90 [ 132.504587][ T269] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 132.504821][ T269] ? trace_lock_acquire+0x14c/0x1f0 [ 132.505057][ T269] ? lock_acquire+0x32/0xc0 [ 132.505285][ T269] ? blocking_notifier_call_chain+0x50/0x90 [ 132.505578][ T269] down_read+0x9f/0x340 [ 132.505757][ T269] ? blocking_notifier_call_chain+0x50/0x90 [ 132.506033][ T269] ? __pfx_down_read+0x10/0x10 [ 132.506266][ T269] ? __pfx_validate_chain+0x10/0x10 [ 132.506491][ T269] ? hlock_class+0x4e/0x130 [ 132.506713][ T269] ? mark_lock+0x38/0x3e0 [ 132.506883][ T269] blocking_notifier_call_chain+0x50/0x90 [ 132.507112][ T269] netdev_lower_state_changed+0xa3/0x130 [ 132.507346][ T269] ? __pfx_netdev_lower_state_changed+0x10/0x10 [ 132.507640][ T269] ? __pfx_netdev_has_upper_dev+0x10/0x10 [ 132.507877][ T269] __bond_release_one+0xcc7/0x13f0 [ 132.508116][ T269] ? __lock_release+0x103/0x460 [ 132.508348][ T269] ? __try_to_del_timer_sync+0xe7/0x140 [ 132.508583][ T269] ? __pfx___bond_release_one+0x10/0x10 [ 132.508810][ T269] ? hlock_class+0x4e/0x130 [ 132.509009][ T269] ? mark_lock+0x38/0x3e0 [ 132.509153][ T269] ? mark_held_locks+0x9e/0xe0 [ 132.509379][ T269] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 132.509690][ T269] ? __try_to_del_timer_sync+0xe7/0x140 [ 132.509855][ T269] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 132.510054][ T269] ? mark_held_locks+0x9e/0xe0 [ 132.510212][ T269] bond_slave_netdev_event+0x73a/0x870 [ 132.510376][ T269] ? ipmr_device_event+0x3d/0x1b0 [ 132.510534][ T269] notifier_call_chain+0xcd/0x150 [ 132.510782][ T269] blocking_notifier_call_chain+0x66/0x90 [ 132.510936][ T269] unregister_netdevice_many_notify+0xa7b/0x1580 [ 132.511128][ T269] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 132.511326][ T269] ? default_device_exit_batch+0x81/0x2e0 [ 132.511564][ T269] ? rtnl_is_locked+0x15/0x20 [ 132.511720][ T269] ? unregister_netdevice_queue+0x70/0x410 [ 132.511906][ T269] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 132.512202][ T269] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 132.512395][ T269] default_device_exit_batch+0x241/0x2e0 [ 132.512551][ T269] ? __pfx_default_device_exit_batch+0x10/0x10 [ 132.512755][ T269] ? mutex_is_locked+0x1c/0x60 [ 132.512995][ T269] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 132.513183][ T269] cleanup_net+0x4ef/0xa50 [ 132.513366][ T269] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 132.513521][ T269] ? __pfx_cleanup_net+0x10/0x10 [ 132.513765][ T269] ? trace_lock_acquire+0x14c/0x1f0 [ 132.513929][ T269] ? lock_acquire+0x32/0xc0 [ 132.514088][ T269] ? process_one_work+0xe0b/0x16d0 [ 132.514270][ T269] process_one_work+0xe55/0x16d0 [ 132.514509][ T269] ? __pfx___lock_release+0x10/0x10 [ 132.514665][ T269] ? __pfx_process_one_work+0x10/0x10 [ 132.514817][ T269] ? assign_work+0x16c/0x240 [ 132.514971][ T269] worker_thread+0x58c/0xce0 [ 132.515199][ T269] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 132.515391][ T269] ? __pfx_worker_thread+0x10/0x10 [ 132.515544][ T269] ? __pfx_worker_thread+0x10/0x10 [ 132.515769][ T269] kthread+0x28a/0x350 [ 132.515887][ T269] ? __pfx_kthread+0x10/0x10 [ 132.516041][ T269] ret_from_fork+0x31/0x70 [ 132.516196][ T269] ? __pfx_kthread+0x10/0x10 [ 132.516348][ T269] ret_from_fork_asm+0x1a/0x30 [ 132.516590][ T269] [ 132.520541][ T269] bond0: (slave eth0): Releasing backup interface