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BUG: KCSAN: data-race in br_handle_frame_finish / br_handle_frame_finish

read-write to 0xffff88813a2ae170 of 8 bytes by interrupt on cpu 1:
 br_handle_frame_finish+0xd4f/0xee0
 br_nf_hook_thresh+0x1ed/0x220
 br_nf_pre_routing_finish_ipv6+0x511/0x540
 br_nf_pre_routing_ipv6+0x1e3/0x2a0
 br_nf_pre_routing+0x526/0xba0
 br_handle_frame+0x4ca/0x8e0
 __netif_receive_skb_core+0x9fb/0x1ec0
 __netif_receive_skb+0x57/0x1b0
 process_backlog+0x21f/0x380
 __napi_poll+0x60/0x3b0
 net_rx_action+0x328/0x6c0
 __do_softirq+0xe4/0x2b0
 run_ksoftirqd+0x23/0x30
 smpboot_thread_fn+0x2f8/0x490
 kthread+0x1ac/0x1e0
 ret_from_fork+0x1f/0x30

read-write to 0xffff88813a2ae170 of 8 bytes by interrupt on cpu 0:
 br_handle_frame_finish+0xd4f/0xee0
 br_nf_hook_thresh+0x1ed/0x220
 br_nf_pre_routing_finish_ipv6+0x511/0x540
 br_nf_pre_routing_ipv6+0x1e3/0x2a0
 br_nf_pre_routing+0x526/0xba0
 br_handle_frame+0x4ca/0x8e0
 __netif_receive_skb_core+0x9fb/0x1ec0
 __netif_receive_skb+0x57/0x1b0
 process_backlog+0x21f/0x380
 __napi_poll+0x60/0x3b0
 net_rx_action+0x328/0x6c0
 __do_softirq+0xe4/0x2b0
 run_ksoftirqd+0x23/0x30
 smpboot_thread_fn+0x2f8/0x490
 kthread+0x1ac/0x1e0
 ret_from_fork+0x1f/0x30

value changed: 0x0000000000003415 -> 0x0000000000003416

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12 Comm: ksoftirqd/0 Tainted: G        W          6.2.0-rc6-syzkaller-00163-g66a87fff1a87-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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