==================================================================
BUG: KCSAN: data-race in br_handle_frame_finish / br_handle_frame_finish

read-write to 0xffff888136b3c170 of 8 bytes by interrupt on cpu 0:
 br_handle_frame_finish+0xb16/0xbc0 net/bridge/br_input.c:165
 br_nf_hook_thresh+0x194/0x1d0
 br_nf_pre_routing_finish_ipv6+0x4a3/0x4c0
 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+0x4bb/0xa90 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:248 [inline]
 br_handle_frame+0x483/0x7d0 net/bridge/br_input.c:392
 __netif_receive_skb_core+0xa4e/0x1cd0 net/core/dev.c:5297
 __netif_receive_skb_one_core net/core/dev.c:5403 [inline]
 __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5519
 process_backlog+0x23f/0x3b0 net/core/dev.c:5847
 __napi_poll+0x65/0x390 net/core/dev.c:6413
 napi_poll net/core/dev.c:6480 [inline]
 net_rx_action+0x29e/0x650 net/core/dev.c:6567
 __do_softirq+0x158/0x2e3 kernel/softirq.c:558
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:921
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

read-write to 0xffff888136b3c170 of 8 bytes by interrupt on cpu 1:
 br_handle_frame_finish+0xb16/0xbc0 net/bridge/br_input.c:165
 br_nf_hook_thresh+0x194/0x1d0
 br_nf_pre_routing_finish_ipv6+0x4a3/0x4c0
 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+0x4bb/0xa90 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:248 [inline]
 br_handle_frame+0x483/0x7d0 net/bridge/br_input.c:392
 __netif_receive_skb_core+0xa4e/0x1cd0 net/core/dev.c:5297
 __netif_receive_skb_one_core net/core/dev.c:5403 [inline]
 __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5519
 process_backlog+0x23f/0x3b0 net/core/dev.c:5847
 __napi_poll+0x65/0x390 net/core/dev.c:6413
 napi_poll net/core/dev.c:6480 [inline]
 net_rx_action+0x29e/0x650 net/core/dev.c:6567
 __do_softirq+0x158/0x2e3 kernel/softirq.c:558
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:921
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

value changed: 0x0000000000004ff4 -> 0x0000000000004ff5

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.18.0-rc6-syzkaller-00153-g2fe1020d73ca-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================