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BUG: KCSAN: data-race in br_handle_frame_finish / br_handle_frame_finish

write to 0xffff888131ce8170 of 8 bytes by interrupt on cpu 0:
 br_handle_frame_finish+0xab2/0xbe0 net/bridge/br_input.c:147
 br_nf_hook_thresh+0x194/0x1d0
 br_nf_pre_routing_finish_ipv6+0x4e6/0x500
 NF_HOOK include/linux/netfilter.h:307 [inline]
 br_nf_pre_routing_ipv6+0x1ea/0x280 net/bridge/br_netfilter_ipv6.c:236
 br_nf_pre_routing+0x4d1/0xb30 net/bridge/br_netfilter_hooks.c:505
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:230 [inline]
 br_handle_frame+0x483/0xbc0 net/bridge/br_input.c:370
 __netif_receive_skb_core+0xa39/0x1e20 net/core/dev.c:5245
 __netif_receive_skb_one_core net/core/dev.c:5349 [inline]
 __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5465
 process_backlog+0x23f/0x3e0 net/core/dev.c:5797
 __napi_poll+0x65/0x3f0 net/core/dev.c:6365
 napi_poll net/core/dev.c:6432 [inline]
 net_rx_action+0x29e/0x650 net/core/dev.c:6519
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:921
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1bf/0x1e0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30

read to 0xffff888131ce8170 of 8 bytes by interrupt on cpu 1:
 br_handle_frame_finish+0xaa0/0xbe0 net/bridge/br_input.c:147
 br_nf_hook_thresh+0x194/0x1d0
 br_nf_pre_routing_finish_ipv6+0x4e6/0x500
 NF_HOOK include/linux/netfilter.h:307 [inline]
 br_nf_pre_routing_ipv6+0x1ea/0x280 net/bridge/br_netfilter_ipv6.c:236
 br_nf_pre_routing+0x4d1/0xb30 net/bridge/br_netfilter_hooks.c:505
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:230 [inline]
 br_handle_frame+0x483/0xbc0 net/bridge/br_input.c:370
 __netif_receive_skb_core+0xa39/0x1e20 net/core/dev.c:5245
 __netif_receive_skb_one_core net/core/dev.c:5349 [inline]
 __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5465
 process_backlog+0x23f/0x3e0 net/core/dev.c:5797
 __napi_poll+0x65/0x3f0 net/core/dev.c:6365
 napi_poll net/core/dev.c:6432 [inline]
 net_rx_action+0x29e/0x650 net/core/dev.c:6519
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 do_softirq+0xb1/0xf0 kernel/softirq.c:459
 __local_bh_enable_ip+0x68/0x70 kernel/softirq.c:383
 local_bh_enable+0x1b/0x20 include/linux/bottom_half.h:33
 rcu_read_unlock_bh include/linux/rcupdate.h:764 [inline]
 ip_finish_output2+0x748/0xb70 net/ipv4/ip_output.c:229
 ip_finish_output+0xfb/0x240 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0xf3/0x1a0 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:451 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0xa5f/0xa90 net/ipv4/ip_output.c:532
 ip_queue_xmit+0x34/0x40 net/ipv4/ip_output.c:546
 __tcp_transmit_skb+0x1323/0x1840 net/ipv4/tcp_output.c:1402
 tcp_transmit_skb net/ipv4/tcp_output.c:1420 [inline]
 tcp_write_xmit+0x1450/0x4460 net/ipv4/tcp_output.c:2680
 __tcp_push_pending_frames+0x68/0x1c0 net/ipv4/tcp_output.c:2864
 tcp_push+0x2d9/0x2f0 net/ipv4/tcp.c:725
 tcp_sendmsg_locked+0x1cba/0x25b0 net/ipv4/tcp.c:1421
 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1449
 inet_sendmsg+0x5f/0x80 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 sock_write_iter+0x1a3/0x200 net/socket.c:1061
 call_write_iter include/linux/fs.h:2074 [inline]
 new_sync_write fs/read_write.c:503 [inline]
 vfs_write+0x7f5/0x950 fs/read_write.c:590
 ksys_write+0xd9/0x190 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:652
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000000000000c7b3 -> 0x000000000000c7b4

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1801 Comm: syz-fuzzer Not tainted 5.17.0-rc5-syzkaller-00306-g2293be58d6a1-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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