[ 10.730307][ T232] ip (232) used greatest stack depth: 23928 bytes left [ 11.401918][ T238] bond0: (slave eth0): making interface the new active one [ 11.402764][ T238] bond0: (slave eth0): Enslaving as an active interface with an up link [ 16.128120][ T242] bond0: (slave eth0): Releasing backup interface [ 16.704344][ T245] bond0: (slave eth0): Enslaving as an active interface with an up link [ 21.265909][ T11] [ 21.266082][ T11] ============================================ [ 21.266366][ T11] WARNING: possible recursive locking detected [ 21.266647][ T11] 6.13.0-rc5-virtme #1 Not tainted [ 21.266858][ T11] -------------------------------------------- [ 21.267121][ T11] kworker/u16:0/11 is trying to acquire lock: [ 21.267388][ T11] ffffffffb39f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 21.267816][ T11] [ 21.267816][ T11] but task is already holding lock: [ 21.268135][ T11] ffffffffb39f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 21.268562][ T11] [ 21.268562][ T11] other info that might help us debug this: [ 21.268872][ T11] Possible unsafe locking scenario: [ 21.268872][ T11] [ 21.269177][ T11] CPU0 [ 21.269413][ T11] ---- [ 21.269528][ T11] lock((netdev_chain).rwsem); [ 21.269670][ T11] lock((netdev_chain).rwsem); [ 21.269809][ T11] [ 21.269809][ T11] *** DEADLOCK *** [ 21.269809][ T11] [ 21.270017][ T11] May be due to missing lock nesting notation [ 21.270017][ T11] [ 21.270220][ T11] 5 locks held by kworker/u16:0/11: [ 21.270360][ T11] #0: ffff8880010ad948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 21.270655][ T11] #1: ffffc900000b7da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 21.270906][ T11] #2: ffffffffb39e6550 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xa50 [ 21.271156][ T11] #3: ffffffffb3a01dc8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 21.271446][ T11] #4: ffffffffb39f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 21.271729][ T11] [ 21.271729][ T11] stack backtrace: [ 21.271904][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.13.0-rc5-virtme #1 [ 21.272150][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 21.272329][ T11] Workqueue: netns cleanup_net [ 21.272478][ T11] Call Trace: [ 21.272586][ T11] [ 21.272662][ T11] dump_stack_lvl+0x82/0xd0 [ 21.272809][ T11] print_deadlock_bug+0x40a/0x650 [ 21.272956][ T11] validate_chain+0x5bf/0xae0 [ 21.273100][ T11] ? __pfx_validate_chain+0x10/0x10 [ 21.273247][ T11] ? hlock_class+0x4e/0x130 [ 21.273387][ T11] ? mark_lock+0x38/0x3e0 [ 21.273497][ T11] __lock_acquire+0xb9a/0x1680 [ 21.273637][ T11] ? mark_lock_irq+0x9b1/0xa10 [ 21.273779][ T11] lock_acquire.part.0+0xeb/0x330 [ 21.273919][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 21.274091][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 21.274236][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 21.274377][ T11] ? lock_acquire+0x32/0xc0 [ 21.274515][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 21.274688][ T11] down_read+0x9f/0x340 [ 21.274796][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 21.274973][ T11] ? __pfx_down_read+0x10/0x10 [ 21.275116][ T11] ? __pfx_validate_chain+0x10/0x10 [ 21.275257][ T11] ? hlock_class+0x4e/0x130 [ 21.275397][ T11] ? mark_lock+0x38/0x3e0 [ 21.275521][ T11] blocking_notifier_call_chain+0x50/0x90 [ 21.275683][ T11] netdev_lower_state_changed+0xa3/0x130 [ 21.275825][ T11] ? __pfx_netdev_lower_state_changed+0x10/0x10 [ 21.275997][ T11] ? __pfx_netdev_has_upper_dev+0x10/0x10 [ 21.276141][ T11] __bond_release_one+0xcc7/0x13f0 [ 21.276288][ T11] ? __lock_release+0x103/0x460 [ 21.276429][ T11] ? __try_to_del_timer_sync+0xe7/0x140 [ 21.276574][ T11] ? __pfx___bond_release_one+0x10/0x10 [ 21.276716][ T11] ? hlock_class+0x4e/0x130 [ 21.276854][ T11] ? mark_lock+0x38/0x3e0 [ 21.276960][ T11] ? mark_held_locks+0x9e/0xe0 [ 21.277101][ T11] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 21.277283][ T11] ? __try_to_del_timer_sync+0xe7/0x140 [ 21.277424][ T11] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 21.277598][ T11] ? mark_held_locks+0x9e/0xe0 [ 21.277737][ T11] bond_slave_netdev_event+0x73a/0x870 [ 21.277881][ T11] ? ipmr_device_event+0x3d/0x1b0 [ 21.278021][ T11] notifier_call_chain+0xcd/0x150 [ 21.278163][ T11] blocking_notifier_call_chain+0x66/0x90 [ 21.278301][ T11] unregister_netdevice_many_notify+0xa7b/0x1580 [ 21.278479][ T11] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 21.278654][ T11] ? default_device_exit_batch+0x81/0x2e0 [ 21.278796][ T11] ? rtnl_is_locked+0x15/0x20 [ 21.278937][ T11] ? unregister_netdevice_queue+0x70/0x410 [ 21.279112][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 21.279298][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 21.279478][ T11] default_device_exit_batch+0x241/0x2e0 [ 21.279632][ T11] ? __pfx_default_device_exit_batch+0x10/0x10 [ 21.279803][ T11] ? mutex_is_locked+0x1c/0x60 [ 21.279953][ T11] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 21.280128][ T11] cleanup_net+0x4ef/0xa50 [ 21.280268][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 21.280405][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 21.280543][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 21.280685][ T11] ? lock_acquire+0x32/0xc0 [ 21.280824][ T11] ? process_one_work+0xe0b/0x16d0 [ 21.280971][ T11] process_one_work+0xe55/0x16d0 [ 21.281113][ T11] ? __pfx___lock_release+0x10/0x10 [ 21.281252][ T11] ? __pfx_process_one_work+0x10/0x10 [ 21.281390][ T11] ? assign_work+0x16c/0x240 [ 21.281530][ T11] worker_thread+0x58c/0xce0 [ 21.281671][ T11] ? __pfx_worker_thread+0x10/0x10 [ 21.281809][ T11] kthread+0x28a/0x350 [ 21.281918][ T11] ? __pfx_kthread+0x10/0x10 [ 21.282057][ T11] ret_from_fork+0x31/0x70 [ 21.282194][ T11] ? __pfx_kthread+0x10/0x10 [ 21.282333][ T11] ret_from_fork_asm+0x1a/0x30 [ 21.282481][ T11] [ 21.283113][ T11] bond0: (slave eth0): Releasing backup interface