[ 11.290797][ T273] ip (273) used greatest stack depth: 23616 bytes left [ 11.532870][ T279] veth0: renamed from veth-hv-1 [ 12.376365][ T294] br0: port 1(vxlan0) entered blocking state [ 12.376793][ T294] br0: port 1(vxlan0) entered disabled state [ 12.377024][ T294] vxlan0: entered allmulticast mode [ 12.379025][ T294] vxlan0: entered promiscuous mode [ 12.456865][ T295] br0: port 1(vxlan0) entered blocking state [ 12.457505][ T295] br0: port 1(vxlan0) entered forwarding state [ 12.624865][ T298] veth0: renamed from veth-hv-2 [ 13.287630][ T306] br0: port 1(vxlan0) entered blocking state [ 13.288179][ T306] br0: port 1(vxlan0) entered disabled state [ 13.288987][ T306] vxlan0: entered allmulticast mode [ 13.290158][ T306] vxlan0: entered promiscuous mode [ 13.371883][ T307] br0: port 1(vxlan0) entered blocking state [ 13.372200][ T307] br0: port 1(vxlan0) entered forwarding state [ 13.775953][ T313] br0: port 2(veth-tap) entered blocking state [ 13.776229][ T313] br0: port 2(veth-tap) entered disabled state [ 13.776493][ T313] veth-tap: entered allmulticast mode [ 13.777688][ T313] veth-tap: entered promiscuous mode [ 14.218999][ T37] br0: port 2(veth-tap) entered blocking state [ 14.219475][ T37] br0: port 2(veth-tap) entered forwarding state [ 14.564776][ T323] br0: port 2(veth-tap) entered blocking state [ 14.565128][ T323] br0: port 2(veth-tap) entered disabled state [ 14.565400][ T323] veth-tap: entered allmulticast mode [ 14.566572][ T323] veth-tap: entered promiscuous mode [ 14.981614][ T39] br0: port 2(veth-tap) entered blocking state [ 14.981893][ T39] br0: port 2(veth-tap) entered forwarding state [ 15.355447][ T332] ip (332) used greatest stack depth: 23536 bytes left [ 15.445724][ T333] br0: port 1(vxlan0) entered disabled state [ 15.523796][ T334] br0: port 1(vxlan0) entered blocking state [ 15.524131][ T334] br0: port 1(vxlan0) entered forwarding state [ 15.719732][ T337] br0: port 1(vxlan0) entered disabled state [ 15.798965][ T338] br0: port 1(vxlan0) entered blocking state [ 15.799344][ T338] br0: port 1(vxlan0) entered forwarding state [ 16.517444][ T66] veth-tap: left allmulticast mode [ 16.517737][ T66] veth-tap: left promiscuous mode [ 16.518057][ T66] br0: port 2(veth-tap) entered disabled state [ 16.521423][ T66] vxlan0: left allmulticast mode [ 16.521631][ T66] vxlan0: left promiscuous mode [ 16.521922][ T66] br0: port 1(vxlan0) entered disabled state [ 16.810577][ T66] [ 16.810684][ T66] ============================================ [ 16.810861][ T66] WARNING: possible recursive locking detected [ 16.811029][ T66] 6.13.0-rc5-virtme #1 Not tainted [ 16.811166][ T66] -------------------------------------------- [ 16.811339][ T66] kworker/u16:1/66 is trying to acquire lock: [ 16.811506][ T66] ffffffffa51f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 16.811792][ T66] [ 16.811792][ T66] but task is already holding lock: [ 16.811992][ T66] ffffffffa51f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 16.812265][ T66] [ 16.812265][ T66] other info that might help us debug this: [ 16.812467][ T66] Possible unsafe locking scenario: [ 16.812467][ T66] [ 16.812676][ T66] CPU0 [ 16.812777][ T66] ---- [ 16.812878][ T66] lock((netdev_chain).rwsem); [ 16.813013][ T66] lock((netdev_chain).rwsem); [ 16.813148][ T66] [ 16.813148][ T66] *** DEADLOCK *** [ 16.813148][ T66] [ 16.813352][ T66] May be due to missing lock nesting notation [ 16.813352][ T66] [ 16.813552][ T66] 5 locks held by kworker/u16:1/66: [ 16.813690][ T66] #0: ffff8880010b5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 16.813976][ T66] #1: ffffc90000477da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 16.814224][ T66] #2: ffffffffa51ec4d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xba0 [ 16.814470][ T66] #3: ffffffffa5207e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 16.814751][ T66] #4: ffffffffa51f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 16.815034][ T66] [ 16.815034][ T66] stack backtrace: [ 16.815206][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.13.0-rc5-virtme #1 [ 16.815444][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.815613][ T66] Workqueue: netns cleanup_net [ 16.815757][ T66] Call Trace: [ 16.815863][ T66] [ 16.815937][ T66] dump_stack_lvl+0x82/0xd0 [ 16.816087][ T66] print_deadlock_bug+0x40a/0x650 [ 16.816229][ T66] validate_chain+0x5bf/0xae0 [ 16.816371][ T66] ? __pfx_validate_chain+0x10/0x10 [ 16.816514][ T66] ? hlock_class+0x4e/0x130 [ 16.816652][ T66] ? mark_lock+0x38/0x3e0 [ 16.816758][ T66] __lock_acquire+0xb9a/0x1680 [ 16.816900][ T66] lock_acquire.part.0+0xeb/0x330 [ 16.817037][ T66] ? blocking_notifier_call_chain+0x50/0x90 [ 16.817210][ T66] ? __lock_acquire+0xb9a/0x1680 [ 16.817347][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.817487][ T66] ? trace_lock_acquire+0x14c/0x1f0 [ 16.817624][ T66] ? lock_acquire+0x32/0xc0 [ 16.817762][ T66] ? blocking_notifier_call_chain+0x50/0x90 [ 16.817932][ T66] down_read+0x9f/0x340 [ 16.818040][ T66] ? blocking_notifier_call_chain+0x50/0x90 [ 16.818211][ T66] ? __pfx_down_read+0x10/0x10 [ 16.818348][ T66] ? __lock_release+0x103/0x460 [ 16.818486][ T66] blocking_notifier_call_chain+0x50/0x90 [ 16.818625][ T66] __netdev_upper_dev_unlink+0xd9/0x220 [ 16.818762][ T66] ? mark_held_locks+0x9e/0xe0 [ 16.818896][ T66] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 16.819064][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 16.819236][ T66] ? __try_to_del_timer_sync+0xe7/0x140 [ 16.819373][ T66] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 16.819539][ T66] ? mark_held_locks+0x9e/0xe0 [ 16.819676][ T66] netdev_upper_dev_unlink+0x71/0xa0 [ 16.819811][ T66] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 16.819979][ T66] ? mutex_is_locked+0x1c/0x60 [ 16.820121][ T66] ? rtnl_is_locked+0x15/0x20 [ 16.820278][ T66] ? netdev_master_upper_dev_get+0x13/0x120 [ 16.820445][ T66] vrf_device_event+0x78/0xe0 [ 16.820583][ T66] notifier_call_chain+0xcd/0x150 [ 16.820724][ T66] blocking_notifier_call_chain+0x66/0x90 [ 16.820864][ T66] unregister_netdevice_many_notify+0xa83/0x1580 [ 16.821035][ T66] ? unregister_netdevice_queue+0x70/0x410 [ 16.821205][ T66] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 16.821377][ T66] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 16.821545][ T66] ? rtnl_is_locked+0x15/0x20 [ 16.821680][ T66] ? unregister_netdevice_queue+0x70/0x410 [ 16.821847][ T66] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 16.822012][ T66] ? vrf_dellink+0x100/0x150 [ 16.822148][ T66] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 16.822322][ T66] default_device_exit_batch+0x241/0x2e0 [ 16.822461][ T66] ? __pfx_default_device_exit_batch+0x10/0x10 [ 16.822638][ T66] ? ops_exit_list+0xb4/0x170 [ 16.822776][ T66] cleanup_net+0x4ef/0xba0 [ 16.822915][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.823051][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 16.823184][ T66] ? trace_lock_acquire+0x14c/0x1f0 [ 16.823324][ T66] ? lock_acquire+0x32/0xc0 [ 16.823460][ T66] ? process_one_work+0xe0b/0x16d0 [ 16.823596][ T66] process_one_work+0xe55/0x16d0 [ 16.823735][ T66] ? __pfx___lock_release+0x10/0x10 [ 16.823872][ T66] ? __pfx_process_one_work+0x10/0x10 [ 16.824013][ T66] ? assign_work+0x16c/0x240 [ 16.824150][ T66] worker_thread+0x58c/0xce0 [ 16.824286][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 16.824459][ T66] ? __pfx_worker_thread+0x10/0x10 [ 16.824596][ T66] ? __pfx_worker_thread+0x10/0x10 [ 16.824733][ T66] kthread+0x28a/0x350 [ 16.824837][ T66] ? __pfx_kthread+0x10/0x10 [ 16.824974][ T66] ret_from_fork+0x31/0x70 [ 16.825109][ T66] ? __pfx_kthread+0x10/0x10 [ 16.825245][ T66] ret_from_fork_asm+0x1a/0x30 [ 16.825388][ T66] [ 16.842216][ T66] br0: port 1(vxlan0) entered disabled state [ 16.857622][ T66] vxlan0 (unregistering): left allmulticast mode [ 16.857825][ T66] vxlan0 (unregistering): left promiscuous mode [ 16.858008][ T66] br0: port 1(vxlan0) entered disabled state [ 16.902727][ T66] veth-tap: left allmulticast mode [ 16.902888][ T66] veth-tap: left promiscuous mode [ 16.903132][ T66] br0: port 2(veth-tap) entered disabled state