bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P76/1:b..l P5091/2:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=38177, q=509 ncpus=2)
task:syz-fuzzer      state:R  running task     stack:25096 pid:5091  ppid:4992   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 preempt_schedule_common+0x45/0xb0 kernel/sched/core.c:6838
 preempt_schedule_thunk+0x1a/0x20 arch/x86/entry/thunk_64.S:34
 __local_bh_enable_ip+0x10d/0x130 kernel/softirq.c:388
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 nf_conntrack_tcp_packet+0x188d/0x6440 net/netfilter/nf_conntrack_proto_tcp.c:1291
 nf_conntrack_handle_packet net/netfilter/nf_conntrack_core.c:1929 [inline]
 nf_conntrack_in+0x35b/0x17d0 net/netfilter/nf_conntrack_core.c:2019
 ipv4_conntrack_local+0x117/0x260 net/netfilter/nf_conntrack_proto.c:229
 nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline]
 nf_hook_slow+0xc9/0x1f0 net/netfilter/core.c:626
 nf_hook+0x1cb/0x640 include/linux/netfilter.h:258
 __ip_local_out+0x31e/0x610 net/ipv4/ip_output.c:115
 ip_local_out net/ipv4/ip_output.c:124 [inline]
 __ip_queue_xmit+0x84e/0x1c50 net/ipv4/ip_output.c:533
 __tcp_transmit_skb+0x194b/0x3800 net/ipv4/tcp_output.c:1399
 tcp_transmit_skb net/ipv4/tcp_output.c:1417 [inline]
 tcp_write_xmit+0x1025/0x6160 net/ipv4/tcp_output.c:2693
 __tcp_push_pending_frames+0xae/0x390 net/ipv4/tcp_output.c:2877
 tcp_push+0x49d/0x720 net/ipv4/tcp.c:733
 tcp_sendmsg_locked+0x1ff8/0x2960 net/ipv4/tcp.c:1459
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1487
 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:827
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:748
 sock_write_iter+0x29b/0x3d0 net/socket.c:1141
 call_write_iter include/linux/fs.h:1872 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x981/0xda0 fs/read_write.c:584
 ksys_write+0x1e3/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x403ace
RSP: 002b:000000c000deb0d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000403ace
RDX: 00000000000000f0 RSI: 000000c00027a200 RDI: 0000000000000003
RBP: 000000c000deb118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000c000deb258
R13: 0000000000000000 R14: 000000c006ffc1a0 R15: 000000c000104900
 </TASK>
task:kworker/u4:4    state:R  running task     stack:25624 pid:76    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:6981
 irqentry_exit+0x35/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1f5/0x520 kernel/locking/lockdep.c:5673
Code: 98 9c 7e 83 f8 01 0f 85 b9 02 00 00 9c 58 f6 c4 02 0f 85 a4 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900020bfa38 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000417f49 RCX: df7b6fbf9f96e36d
RDX: 1ffff11003358c80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff91539d07
R10: fffffbfff22a73a0 R11: 1ffff1100fc61442 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8c799040 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
 rcu_read_lock include/linux/rcupdate.h:773 [inline]
 inet_twsk_purge+0x132/0x900 net/ipv4/inet_timewait_sock.c:292
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2408
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2555
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:1a:3b:5c:51:26, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:1a:3b:5c:51:26, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)