[ 12.511211][ T291] 8021q: 802.1Q VLAN Support v1.8 [ 13.555976][ T303] ip (303) used greatest stack depth: 24112 bytes left [ 13.638432][ T307] br0: port 1(veth1) entered blocking state [ 13.638866][ T307] br0: port 1(veth1) entered disabled state [ 13.639225][ T307] veth1: entered allmulticast mode [ 13.641211][ T307] veth1: entered promiscuous mode [ 13.717063][ T309] br0: port 2(veth2) entered blocking state [ 13.718225][ T309] br0: port 2(veth2) entered disabled state [ 13.718496][ T309] veth2: entered allmulticast mode [ 13.720321][ T309] veth2: entered promiscuous mode [ 13.884740][ T39] br0: port 1(veth1) entered blocking state [ 13.885580][ T39] br0: port 1(veth1) entered forwarding state [ 13.887816][ C1] [ 13.888156][ C1] ============================= [ 13.888454][ C1] WARNING: suspicious RCU usage [ 13.888733][ C1] 6.14.0-rc6-virtme #1 Not tainted [ 13.889000][ C1] ----------------------------- [ 13.889404][ C1] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 13.889868][ C1] [ 13.889868][ C1] other info that might help us debug this: [ 13.889868][ C1] [ 13.890395][ C1] [ 13.890395][ C1] rcu_scheduler_active = 2, debug_locks = 1 [ 13.890792][ C1] 3 locks held by ksoftirqd/1/25: [ 13.891051][ C1] #0: ffffc900001c7bc0 ((&pmctx->ip4_own_query.timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 13.891602][ C1] #1: ffff88800bf0b358 (&br->multicast_lock){+.-.}-{3:3}, at: br_multicast_port_query_expired+0x62/0x2c0 [bridge] [ 13.892266][ C1] #2: ffffffff9675b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 13.892753][ C1] [ 13.892753][ C1] stack backtrace: [ 13.893084][ C1] CPU: 1 UID: 0 PID: 25 Comm: ksoftirqd/1 Not tainted 6.14.0-rc6-virtme #1 [ 13.893090][ C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.893093][ C1] Call Trace: [ 13.893095][ C1] [ 13.893100][ C1] dump_stack_lvl+0xb0/0xd0 [ 13.893112][ C1] lockdep_rcu_suspicious+0x1ea/0x280 [ 13.893130][ C1] dev_hard_start_xmit+0x2fc/0x3f0 [ 13.893151][ C1] __dev_queue_xmit+0xfaf/0x18d0 [ 13.893171][ C1] ? __build_skb_around+0x23d/0x350 [ 13.893188][ C1] ? __pfx___dev_queue_xmit+0x10/0x10 [ 13.893193][ C1] ? __pfx___alloc_skb+0x10/0x10 [ 13.893203][ C1] ? stack_trace_save+0x20/0xd0 [ 13.893212][ C1] ? __pfx_stack_trace_save+0x10/0x10 [ 13.893226][ C1] ? __pfx___br_multicast_query_handle_vlan+0x10/0x10 [bridge] [ 13.893317][ C1] br_dev_queue_push_xmit+0x115/0x250 [bridge] [ 13.893375][ C1] ? __pfx_br_dev_queue_push_xmit+0x10/0x10 [bridge] [ 13.893434][ C1] ? br_multicast_count+0x42/0x130 [bridge] [ 13.893502][ C1] __br_multicast_send_query+0x3b7/0x950 [bridge] [ 13.893579][ C1] ? __pfx___br_multicast_send_query+0x10/0x10 [bridge] [ 13.893646][ C1] ? __lock_acquire+0xb9a/0x1680 [ 13.893665][ C1] ? br_multicast_send_query+0x228/0x440 [bridge] [ 13.893723][ C1] br_multicast_send_query+0x228/0x440 [bridge] [ 13.893790][ C1] ? __pfx_br_multicast_send_query+0x10/0x10 [bridge] [ 13.893846][ C1] ? br_multicast_port_query_expired+0x62/0x2c0 [bridge] [ 13.893909][ C1] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge] [ 13.893968][ C1] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.893979][ C1] ? do_raw_spin_lock+0x131/0x270 [ 13.893989][ C1] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 13.893995][ C1] ? lock_acquire+0x32/0xc0 [ 13.894000][ C1] ? br_multicast_port_query_expired+0x62/0x2c0 [bridge] [ 13.894070][ C1] ? br_multicast_port_query_expired+0x230/0x2c0 [bridge] [ 13.894127][ C1] br_multicast_port_query_expired+0x230/0x2c0 [bridge] [ 13.894189][ C1] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge] [ 13.894247][ C1] call_timer_fn+0x13b/0x230 [ 13.894253][ C1] ? call_timer_fn+0xe8/0x230 [ 13.894257][ C1] ? call_timer_fn+0xe8/0x230 [ 13.894265][ C1] ? __pfx_call_timer_fn+0x10/0x10 [ 13.894282][ C1] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 13.894306][ C1] __run_timers+0x545/0x810 [ 13.894313][ C1] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge] [ 13.894385][ C1] ? __pfx___run_timers+0x10/0x10 [ 13.894401][ C1] ? do_raw_spin_lock+0x131/0x270 [ 13.894409][ C1] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 13.894415][ C1] ? lock_acquire+0x32/0xc0 [ 13.894420][ C1] ? run_timer_softirq+0xe6/0x1c0 [ 13.894438][ C1] run_timer_softirq+0xee/0x1c0 [ 13.894447][ C1] handle_softirqs+0x1f6/0x5c0 [ 13.894463][ C1] ? __pfx_run_ksoftirqd+0x10/0x10 [ 13.894475][ C1] run_ksoftirqd+0x33/0x60 [ 13.894479][ C1] smpboot_thread_fn+0x306/0x850 [ 13.894491][ C1] ? __pfx_smpboot_thread_fn+0x10/0x10 [ 13.894504][ C1] kthread+0x359/0x5d0 [ 13.894513][ C1] ? __pfx_kthread+0x10/0x10 [ 13.894530][ C1] ? __pfx_kthread+0x10/0x10 [ 13.894540][ C1] ret_from_fork+0x31/0x70 [ 13.894548][ C1] ? __pfx_kthread+0x10/0x10 [ 13.894554][ C1] ret_from_fork_asm+0x1a/0x30 [ 13.894600][ C1] [ 13.996144][ T41] br0: port 2(veth2) entered blocking state [ 13.996473][ T41] br0: port 2(veth2) entered forwarding state [ 42.012585][ T380] GACT probability NOT on [ 71.844301][ T595] br1: port 1(veth0) entered blocking state [ 71.844679][ T595] br1: port 1(veth0) entered disabled state [ 71.845014][ T595] veth0: entered allmulticast mode [ 71.846999][ T595] veth0: entered promiscuous mode [ 71.858689][ T595] ip (595) used greatest stack depth: 23128 bytes left [ 71.928346][ T597] br1: port 1(veth0) entered blocking state [ 71.928830][ T597] br1: port 1(veth0) entered forwarding state [ 74.231526][ T602] veth0: left allmulticast mode [ 74.231836][ T602] veth0: left promiscuous mode [ 74.232194][ T602] br1: port 1(veth0) entered disabled state [ 86.599108][ T718] br0: vlan filtering disabled, automatically disabling multicast vlan snooping [ 87.092057][ T730] br0: port 2(veth2) entered disabled state [ 87.191076][ T731] br0: port 1(veth1) entered disabled state [ 87.268541][ T732] veth2: left allmulticast mode [ 87.268850][ T732] veth2: left promiscuous mode [ 87.269191][ T732] br0: port 2(veth2) entered disabled state [ 87.271744][ T732] veth1: left allmulticast mode [ 87.271988][ T732] veth1: left promiscuous mode [ 87.272342][ T732] br0: port 1(veth1) entered disabled state