[ 15.088618][ T300] br0: port 1(veth1) entered blocking state
[ 15.089188][ T300] br0: port 1(veth1) entered disabled state
[ 15.089648][ T300] veth1: entered allmulticast mode
[ 15.091759][ T300] veth1: entered promiscuous mode
[ 15.195464][ T301] br0: port 2(veth2) entered blocking state
[ 15.195906][ T301] br0: port 2(veth2) entered disabled state
[ 15.196398][ T301] veth2: entered allmulticast mode
[ 15.199921][ T301] veth2: entered promiscuous mode
[ 15.399300][ T41] br0: port 1(veth1) entered blocking state
[ 15.399783][ T41] br0: port 1(veth1) entered forwarding state
[ 15.401691][ C2]
[ 15.402025][ C2] =============================
[ 15.402283][ C2] WARNING: suspicious RCU usage
[ 15.402519][ C2] 6.14.0-rc6-virtme #1 Not tainted
[ 15.402772][ C2] -----------------------------
[ 15.403057][ C2] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage!
[ 15.403472][ C2]
[ 15.403472][ C2] other info that might help us debug this:
[ 15.403472][ C2]
[ 15.403979][ C2]
[ 15.403979][ C2] rcu_scheduler_active = 2, debug_locks = 1
[ 15.404490][ C2] 7 locks held by kworker/u20:0/41:
[ 15.404823][ C2] #0: ffff8880010a9d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0
[ 15.405577][ C2] #1: ffffc900002dfd40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0
[ 15.406297][ C2] #2: ffffffff9c9f0a08 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
[ 15.406903][ C2] #3: ffffffff9c3440f0 (remove_cache_srcu){.+.+}-{0:0}, at: kasan_quarantine_reduce+0x88/0x1e0
[ 15.407594][ C2] #4: ffffc90000248d60 ((&pmctx->ip4_own_query.timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230
[ 15.408316][ C2] #5: ffff88800ef2b358 (&br->multicast_lock){+.-.}-{3:3}, at: br_multicast_port_query_expired+0x62/0x2c0 [bridge]
[ 15.409158][ C2] #6: ffffffff9c15b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0
[ 15.409762][ C2]
[ 15.409762][ C2] stack backtrace:
[ 15.410218][ C2] CPU: 2 UID: 0 PID: 41 Comm: kworker/u20:0 Not tainted 6.14.0-rc6-virtme #1
[ 15.410226][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.410230][ C2] Workqueue: events_unbound linkwatch_event
[ 15.410241][ C2] Call Trace:
[ 15.410244][ C2]
[ 15.410249][ C2] dump_stack_lvl+0xb0/0xd0
[ 15.410262][ C2] lockdep_rcu_suspicious+0x1ea/0x280
[ 15.410278][ C2] dev_hard_start_xmit+0x2fc/0x3f0
[ 15.410299][ C2] __dev_queue_xmit+0xfaf/0x18d0
[ 15.410320][ C2] ? __build_skb_around+0x23d/0x350
[ 15.410348][ C2] ? __pfx___dev_queue_xmit+0x10/0x10
[ 15.410352][ C2] ? __pfx___alloc_skb+0x10/0x10
[ 15.410363][ C2] ? stack_trace_save+0x20/0xd0
[ 15.410372][ C2] ? __pfx_stack_trace_save+0x10/0x10
[ 15.410388][ C2] ? __pfx___br_multicast_query_handle_vlan+0x10/0x10 [bridge]
[ 15.410483][ C2] br_dev_queue_push_xmit+0x115/0x250 [bridge]
[ 15.410543][ C2] ? __pfx_br_dev_queue_push_xmit+0x10/0x10 [bridge]
[ 15.410597][ C2] ? br_multicast_count+0x42/0x130 [bridge]
[ 15.410663][ C2] __br_multicast_send_query+0x3b7/0x950 [bridge]
[ 15.410742][ C2] ? __pfx___br_multicast_send_query+0x10/0x10 [bridge]
[ 15.410811][ C2] ? __lock_acquire+0xb9a/0x1680
[ 15.410834][ C2] ? br_multicast_send_query+0x228/0x440 [bridge]
[ 15.410893][ C2] br_multicast_send_query+0x228/0x440 [bridge]
[ 15.410960][ C2] ? __pfx_br_multicast_send_query+0x10/0x10 [bridge]
[ 15.411008][ C2] ? br_multicast_port_query_expired+0x62/0x2c0 [bridge]
[ 15.411056][ C2] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge]
[ 15.411103][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 15.411114][ C2] ? do_raw_spin_lock+0x131/0x270
[ 15.411123][ C2] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 15.411131][ C2] ? lock_acquire+0x32/0xc0
[ 15.411134][ C2] ? br_multicast_port_query_expired+0x62/0x2c0 [bridge]
[ 15.411202][ C2] ? br_multicast_port_query_expired+0x230/0x2c0 [bridge]
[ 15.411255][ C2] br_multicast_port_query_expired+0x230/0x2c0 [bridge]
[ 15.411320][ C2] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge]
[ 15.411379][ C2] call_timer_fn+0x13b/0x230
[ 15.411387][ C2] ? call_timer_fn+0xe8/0x230
[ 15.411391][ C2] ? call_timer_fn+0xe8/0x230
[ 15.411399][ C2] ? __pfx_call_timer_fn+0x10/0x10
[ 15.411406][ C2] ? hlock_class+0x4e/0x130
[ 15.411422][ C2] ? mark_held_locks+0x9e/0xe0
[ 15.411447][ C2] __run_timers+0x545/0x810
[ 15.411455][ C2] ? __pfx_br_ip4_multicast_port_query_expired+0x10/0x10 [bridge]
[ 15.411527][ C2] ? __pfx___run_timers+0x10/0x10
[ 15.411532][ C2] ? clockevents_program_event+0xf6/0x300
[ 15.411551][ C2] ? do_raw_spin_lock+0x131/0x270
[ 15.411560][ C2] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 15.411568][ C2] ? lock_acquire+0x32/0xc0
[ 15.411573][ C2] ? run_timer_softirq+0xe6/0x1c0
[ 15.411590][ C2] run_timer_softirq+0xee/0x1c0
[ 15.411599][ C2] handle_softirqs+0x1f6/0x5c0
[ 15.411623][ C2] __irq_exit_rcu+0xc4/0x100
[ 15.411630][ C2] irq_exit_rcu+0xe/0x20
[ 15.411635][ C2] sysvec_apic_timer_interrupt+0x78/0x90
[ 15.411645][ C2]
[ 15.411647][ C2]
[ 15.411652][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 15.411661][ C2] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 15.411669][ C2] Code: 10 e8 b1 3d 87 fd 48 89 ef e8 f9 ad 87 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d b5 0d ef 64 <74> 0e 5b 5d c3 cc cc cc cc e8 2f df ac fd eb dc 0f 1f 44 00 00 5b
[ 15.411674][ C2] RSP: 0018:ffffc900002df868 EFLAGS: 00000286
[ 15.411680][ C2] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff3c47cc3
[ 15.411683][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9b14b761
[ 15.411686][ C2] RBP: ffff88800104f440 R08: 0000000000000001 R09: fffffbfff3c45be5
[ 15.411690][ C2] R10: ffffffff9e22df2f R11: ffff888001da2300 R12: ffff88800bfffad8
[ 15.411694][ C2] R13: 0000000000000000 R14: ffffc900002df8b8 R15: ffff88800bfffc10
[ 15.411717][ C2] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 15.411731][ C2] qlist_free_all+0x4c/0x120
[ 15.411749][ C2] kasan_quarantine_reduce+0x195/0x1e0
[ 15.411763][ C2] __kasan_slab_alloc+0x49/0x70
[ 15.411777][ C2] kmem_cache_alloc_node_noprof+0x110/0x360
[ 15.411786][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 15.411805][ C2] __alloc_skb+0x215/0x2e0
[ 15.411814][ C2] ? __pfx___alloc_skb+0x10/0x10
[ 15.411828][ C2] ? rtnl_prop_list_size+0x245/0x290
[ 15.411843][ C2] ? if_nlmsg_size+0x350/0x8c0
[ 15.411858][ C2] rtmsg_ifinfo_build_skb+0x79/0x230
[ 15.411872][ C2] rtmsg_ifinfo_event.part.0+0x2d/0x120
[ 15.411892][ C2] rtmsg_ifinfo+0x5b/0xa0
[ 15.411910][ C2] netdev_state_change+0x10f/0x120
[ 15.411918][ C2] ? __pfx_netdev_state_change+0x10/0x10
[ 15.411943][ C2] linkwatch_do_dev+0xd2/0x100
[ 15.411950][ C2] __linkwatch_run_queue+0x1df/0x650
[ 15.411963][ C2] ? __pfx___linkwatch_run_queue+0x10/0x10
[ 15.411974][ C2] ? lock_acquire+0x32/0xc0
[ 15.411990][ C2] linkwatch_event+0x40/0x60
[ 15.411995][ C2] process_one_work+0xe55/0x16d0
[ 15.412023][ C2] ? __pfx___lock_release+0x10/0x10
[ 15.412034][ C2] ? __pfx_process_one_work+0x10/0x10
[ 15.412055][ C2] ? assign_work+0x16c/0x240
[ 15.412074][ C2] worker_thread+0x58c/0xce0
[ 15.412101][ C2] ? __pfx_worker_thread+0x10/0x10
[ 15.412113][ C2] kthread+0x359/0x5d0
[ 15.412123][ C2] ? __pfx_kthread+0x10/0x10
[ 15.412142][ C2] ? __pfx_kthread+0x10/0x10
[ 15.412153][ C2] ret_from_fork+0x31/0x70
[ 15.412160][ C2] ? __pfx_kthread+0x10/0x10
[ 15.412165][ C2] ret_from_fork_asm+0x1a/0x30
[ 15.412205][ C2]
[ 15.478796][ T39] br0: port 2(veth2) entered blocking state
[ 15.479525][ T39] br0: port 2(veth2) entered forwarding state
[ 27.025078][ T329] GACT probability NOT on
[ 209.321072][ T1625] br0: port 2(veth2) entered disabled state
[ 209.331641][ T1625] ip (1625) used greatest stack depth: 23856 bytes left
[ 209.424957][ T1626] br0: port 1(veth1) entered disabled state
[ 209.529325][ T1627] veth2: left allmulticast mode
[ 209.529654][ T1627] veth2: left promiscuous mode
[ 209.530026][ T1627] br0: port 2(veth2) entered disabled state
[ 209.532028][ T1627] veth1: left allmulticast mode
[ 209.532299][ T1627] veth1: left promiscuous mode
[ 209.532630][ T1627] br0: port 1(veth1) entered disabled state