[ 53.201898][ T11] [ 53.202012][ T11] ============================================ [ 53.202189][ T11] WARNING: possible recursive locking detected [ 53.202369][ T11] 6.13.0-rc5-virtme #1 Not tainted [ 53.202517][ T11] -------------------------------------------- [ 53.202688][ T11] kworker/u16:0/11 is trying to acquire lock: [ 53.202881][ T11] ffffffffb1ddfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 53.203213][ T11] [ 53.203213][ T11] but task is already holding lock: [ 53.203428][ T11] ffffffffb1ddfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 53.203718][ T11] [ 53.203718][ T11] other info that might help us debug this: [ 53.203924][ T11] Possible unsafe locking scenario: [ 53.203924][ T11] [ 53.204134][ T11] CPU0 [ 53.204240][ T11] ---- [ 53.204345][ T11] lock((netdev_chain).rwsem); [ 53.204489][ T11] lock((netdev_chain).rwsem); [ 53.204631][ T11] [ 53.204631][ T11] *** DEADLOCK *** [ 53.204631][ T11] [ 53.204844][ T11] May be due to missing lock nesting notation [ 53.204844][ T11] [ 53.205061][ T11] 5 locks held by kworker/u16:0/11: [ 53.205201][ T11] #0: ffff8880010ad948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 53.205491][ T11] #1: ffffc900000b7da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 53.205746][ T11] #2: ffffffffb1dd5690 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xa50 [ 53.206005][ T11] #3: ffffffffb1df1088 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 53.206287][ T11] #4: ffffffffb1ddfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 53.206577][ T11] [ 53.206577][ T11] stack backtrace: [ 53.206754][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.13.0-rc5-virtme #1 [ 53.207008][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 53.207185][ T11] Workqueue: netns cleanup_net [ 53.207331][ T11] Call Trace: [ 53.207438][ T11] [ 53.207512][ T11] dump_stack_lvl+0x82/0xd0 [ 53.207664][ T11] print_deadlock_bug+0x40a/0x650 [ 53.207811][ T11] validate_chain+0x5bf/0xae0 [ 53.207952][ T11] ? __pfx_validate_chain+0x10/0x10 [ 53.208099][ T11] ? hlock_class+0x4e/0x130 [ 53.208241][ T11] ? mark_lock+0x38/0x3e0 [ 53.208349][ T11] __lock_acquire+0xb9a/0x1680 [ 53.208493][ T11] lock_acquire.part.0+0xeb/0x330 [ 53.208633][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 53.208814][ T11] ? __lock_acquire+0xb9a/0x1680 [ 53.208954][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.209095][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 53.209241][ T11] ? lock_acquire+0x32/0xc0 [ 53.209383][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 53.209558][ T11] down_read+0x9f/0x340 [ 53.209667][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 53.209849][ T11] ? __pfx_down_read+0x10/0x10 [ 53.210006][ T11] ? __lock_release+0x103/0x460 [ 53.210147][ T11] blocking_notifier_call_chain+0x50/0x90 [ 53.210292][ T11] __netdev_upper_dev_unlink+0xd9/0x220 [ 53.210433][ T11] ? mark_held_locks+0x9e/0xe0 [ 53.210575][ T11] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 53.210753][ T11] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 53.210929][ T11] ? __try_to_del_timer_sync+0xe7/0x140 [ 53.211071][ T11] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 53.211250][ T11] ? mark_held_locks+0x9e/0xe0 [ 53.211392][ T11] netdev_upper_dev_unlink+0x71/0xa0 [ 53.211532][ T11] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 53.211713][ T11] ? mutex_is_locked+0x1c/0x60 [ 53.211854][ T11] ? rtnl_is_locked+0x15/0x20 [ 53.211995][ T11] ? netdev_master_upper_dev_get+0x13/0x120 [ 53.212174][ T11] vrf_device_event+0x78/0xe0 [ 53.212320][ T11] notifier_call_chain+0xcd/0x150 [ 53.212468][ T11] blocking_notifier_call_chain+0x66/0x90 [ 53.212610][ T11] unregister_netdevice_many_notify+0xa7b/0x1580 [ 53.212792][ T11] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 53.212967][ T11] ? default_device_exit_batch+0x81/0x2e0 [ 53.213109][ T11] ? rtnl_is_locked+0x15/0x20 [ 53.213250][ T11] ? unregister_netdevice_queue+0x70/0x410 [ 53.213431][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 53.213606][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 53.213787][ T11] default_device_exit_batch+0x241/0x2e0 [ 53.213927][ T11] ? __pfx_default_device_exit_batch+0x10/0x10 [ 53.214103][ T11] ? mutex_is_locked+0x1c/0x60 [ 53.214248][ T11] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 53.214424][ T11] cleanup_net+0x4ef/0xa50 [ 53.214570][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.214715][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 53.214854][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 53.214996][ T11] ? lock_acquire+0x32/0xc0 [ 53.215138][ T11] ? process_one_work+0xe0b/0x16d0 [ 53.215280][ T11] process_one_work+0xe55/0x16d0 [ 53.215423][ T11] ? __pfx___lock_release+0x10/0x10 [ 53.215568][ T11] ? __pfx_process_one_work+0x10/0x10 [ 53.215717][ T11] ? assign_work+0x16c/0x240 [ 53.215864][ T11] worker_thread+0x58c/0xce0 [ 53.216008][ T11] ? __pfx_worker_thread+0x10/0x10 [ 53.216149][ T11] kthread+0x28a/0x350 [ 53.216258][ T11] ? __pfx_kthread+0x10/0x10 [ 53.216396][ T11] ret_from_fork+0x31/0x70 [ 53.216543][ T11] ? __pfx_kthread+0x10/0x10 [ 53.216682][ T11] ret_from_fork_asm+0x1a/0x30 [ 53.216840][ T11]