[ 1380.911850][T18222] br0: port 1(veth1) entered blocking state
[ 1380.912208][T18222] br0: port 1(veth1) entered disabled state
[ 1380.912522][T18222] veth1: entered allmulticast mode
[ 1380.914464][T18222] veth1: entered promiscuous mode
[ 1380.999648][T18224] br0: port 2(veth2) entered blocking state
[ 1381.000131][T18224] br0: port 2(veth2) entered disabled state
[ 1381.000589][T18224] veth2: entered allmulticast mode
[ 1381.004260][T18224] veth2: entered promiscuous mode
[ 1381.160466][ T3140] br0: port 1(veth1) entered blocking state
[ 1381.161114][ T3140] br0: port 1(veth1) entered forwarding state
[ 1381.162452][ C3]
[ 1381.162687][ C3] =============================
[ 1381.162878][ C3] WARNING: suspicious RCU usage
[ 1381.163092][ C3] 6.14.0-rc6-virtme #1 Not tainted
[ 1381.163288][ C3] -----------------------------
[ 1381.163588][ C3] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage!
[ 1381.163920][ C3]
[ 1381.163920][ C3] other info that might help us debug this:
[ 1381.163920][ C3]
[ 1381.164301][ C3]
[ 1381.164301][ C3] rcu_scheduler_active = 2, debug_locks = 1
[ 1381.164582][ C3] 6 locks held by kworker/u20:2/3140:
[ 1381.164772][ C3] #0: ffff8880010a9d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0
[ 1381.165206][ C3] #1: ffffc90009c37d40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0
[ 1381.165580][ C3] #2: ffffffff9f1f0a08 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
[ 1381.165920][ C3] #3: ffffc900002a0d78 ((&pmctx->ip4_own_query.timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230
[ 1381.166304][ C3] #4: ffff88800a69b358 (&br->multicast_lock){+.-.}-{3:3}, at: br_multicast_port_query_expired+0x62/0x2c0 [bridge]
[ 1381.166775][ C3] #5: ffffffff9e95b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0
[ 1381.167116][ C3]
[ 1381.167116][ C3] stack backtrace:
[ 1381.167361][ C3] CPU: 3 UID: 0 PID: 3140 Comm: kworker/u20:2 Not tainted 6.14.0-rc6-virtme #1
[ 1381.167365][ C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1381.167368][ C3] Workqueue: events_unbound linkwatch_event
[ 1381.167372][ C3] Call Trace:
[ 1381.167375][ C3]
[ 1381.167378][ C3] dump_stack_lvl+0xb0/0xd0
[ 1381.167385][ C3] lockdep_rcu_suspicious+0x1ea/0x280
[ 1381.167395][ C3] dev_hard_start_xmit+0x2fc/0x3f0
[ 1381.167406][ C3] __dev_queue_xmit+0xfaf/0x18d0
[ 1381.167417][ C3] ? __build_skb_around+0x23d/0x350
[ 1381.167427][ C3] ? __pfx___dev_queue_xmit+0x10/0x10
[ 1381.167430][ C3] ? __pfx___alloc_skb+0x10/0x10
[ 1381.167433][ C3] ? __pfx___lock_release+0x10/0x10
[ 1381.167442][ C3] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 1381.167449][ C3] ? __pfx___br_multicast_query_handle_vlan+0x10/0x10 [bridge]
[ 1381.167501][ C3] br_dev_queue_push_xmit+0x115/0x250 [bridge]
[ 1381.167531][ C3] ? hlock_class+0x10/0x130
[ 1381.167536][ C3] ? __pfx_br_dev_queue_push_xmit+0x10/0x10 [bridge]
[ 1381.167568][ C3] ? br_multicast_count+0x42/0x130 [bridge]
[ 1381.167608][ C3] __br_multicast_send_query+0x3b7/0x950 [bridge]
[ 1381.167653][ C3] ? __pfx___br_multicast_send_query+0x10/0x10 [bridge]
[ 1381.167694][ C3] ? __lock_acquire+0xb9a/0x1680
[ 1381.167704][ C3] ? br_multicast_send_query+0x228/0x440 [bridge]
[ 1381.167739][ C3] br_multicast_send_query+0x228/0x440 [bridge]
[ 1381.167778][ C3] ? __pfx_br_multicast_send_query+0x10/0x10 [bridge]
[ 1381.167812][ C3] ? br_multicast_port_query_expired+0x62/0x2c0 [bridge]
[ 1381.167849][ C3] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge]
[ 1381.167884][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1381.167891][ C3] ? do_raw_spin_lock+0x131/0x270
[ 1381.167896][ C3] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 1381.167899][ C3] ? lock_acquire+0x32/0xc0
[ 1381.167902][ C3] ? br_multicast_port_query_expired+0x62/0x2c0 [bridge]
[ 1381.167942][ C3] ? br_multicast_port_query_expired+0x230/0x2c0 [bridge]
[ 1381.167975][ C3] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge]
[ 1381.168009][ C3] br_multicast_port_query_expired+0x230/0x2c0 [bridge]
[ 1381.168046][ C3] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge]
[ 1381.168081][ C3] call_timer_fn+0x13b/0x230
[ 1381.168085][ C3] ? call_timer_fn+0xe8/0x230
[ 1381.168088][ C3] ? call_timer_fn+0xe8/0x230
[ 1381.168092][ C3] ? __pfx_call_timer_fn+0x10/0x10
[ 1381.168096][ C3] ? hlock_class+0x4e/0x130
[ 1381.168105][ C3] ? mark_held_locks+0x9e/0xe0
[ 1381.168117][ C3] __run_timers+0x545/0x810
[ 1381.168121][ C3] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge]
[ 1381.168163][ C3] ? __pfx___run_timers+0x10/0x10
[ 1381.168172][ C3] ? do_raw_spin_lock+0x131/0x270
[ 1381.168177][ C3] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 1381.168181][ C3] ? lock_acquire+0x32/0xc0
[ 1381.168183][ C3] ? run_timer_softirq+0xe6/0x1c0
[ 1381.168194][ C3] run_timer_softirq+0xee/0x1c0
[ 1381.168199][ C3] handle_softirqs+0x1f6/0x5c0
[ 1381.168209][ C3] ? br_device_event+0x627/0x800 [bridge]
[ 1381.168240][ C3] do_softirq+0x4d/0xa0
[ 1381.168243][ C3]
[ 1381.168244][ C3]
[ 1381.168246][ C3] __local_bh_enable_ip+0xf6/0x120
[ 1381.168251][ C3] br_device_event+0x627/0x800 [bridge]
[ 1381.168281][ C3] ? __pfx_br_device_event+0x10/0x10 [bridge]
[ 1381.168313][ C3] ? packet_notifier+0x3b0/0x810
[ 1381.168324][ C3] notifier_call_chain+0xcd/0x150
[ 1381.168336][ C3] netdev_state_change+0xf5/0x120
[ 1381.168340][ C3] ? __pfx_netdev_state_change+0x10/0x10
[ 1381.168355][ C3] linkwatch_do_dev+0xd2/0x100
[ 1381.168360][ C3] __linkwatch_run_queue+0x1df/0x650
[ 1381.168367][ C3] ? __pfx___linkwatch_run_queue+0x10/0x10
[ 1381.168374][ C3] ? lock_acquire+0x32/0xc0
[ 1381.168384][ C3] linkwatch_event+0x40/0x60
[ 1381.168386][ C3] process_one_work+0xe55/0x16d0
[ 1381.168400][ C3] ? __pfx___lock_release+0x10/0x10
[ 1381.168405][ C3] ? __pfx_process_one_work+0x10/0x10
[ 1381.168419][ C3] ? assign_work+0x16c/0x240
[ 1381.168429][ C3] worker_thread+0x58c/0xce0
[ 1381.168433][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1381.168445][ C3] ? __pfx_worker_thread+0x10/0x10
[ 1381.168451][ C3] kthread+0x359/0x5d0
[ 1381.168455][ C3] ? __pfx_kthread+0x10/0x10
[ 1381.168464][ C3] ? __pfx_kthread+0x10/0x10
[ 1381.168470][ C3] ret_from_fork+0x31/0x70
[ 1381.168474][ C3] ? __pfx_kthread+0x10/0x10
[ 1381.168477][ C3] ret_from_fork_asm+0x1a/0x30
[ 1381.168498][ C3]
[ 1391.564451][ T247] br0: port 2(veth2) entered blocking state
[ 1391.564888][ T247] br0: port 2(veth2) entered forwarding state
[ 1398.594147][T18245] br0: port 2(veth2) entered disabled state
[ 1398.830756][ T259] br0: port 2(veth2) entered blocking state
[ 1398.831088][ T259] br0: port 2(veth2) entered forwarding state
[ 1405.834378][T18268] br0: port 1(veth1) entered disabled state
[ 1405.913136][T18269] br0: port 2(veth2) entered disabled state
[ 1406.010291][T18270] veth2: left allmulticast mode
[ 1406.010670][T18270] veth2: left promiscuous mode
[ 1406.011219][T18270] br0: port 2(veth2) entered disabled state
[ 1406.013959][T18270] veth1: left allmulticast mode
[ 1406.014329][T18270] veth1: left promiscuous mode
[ 1406.014838][T18270] br0: port 1(veth1) entered disabled state