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

write to 0xffff888127dbbd40 of 8 bytes by interrupt on cpu 0:
 br_fdb_update+0x145/0x3e0 net/bridge/br_fdb.c:867
 br_handle_frame_finish+0x2d3/0xbc0 net/bridge/br_input.c:121
 br_nf_hook_thresh+0x1ee/0x220
 br_nf_pre_routing_finish_ipv6+0x4fa/0x510
 NF_HOOK include/linux/netfilter.h:307 [inline]
 br_nf_pre_routing_ipv6+0x1ea/0x280 net/bridge/br_netfilter_ipv6.c:237
 br_nf_pre_routing+0x4c9/0xb20 net/bridge/br_netfilter_hooks.c:507
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:255 [inline]
 br_handle_frame+0x483/0x7d0 net/bridge/br_input.c:399
 __netif_receive_skb_core+0xa4e/0x1cc0 net/core/dev.c:5379
 __netif_receive_skb_one_core net/core/dev.c:5483 [inline]
 __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5599
 process_backlog+0x23f/0x3b0 net/core/dev.c:5927
 __napi_poll+0x65/0x390 net/core/dev.c:6511
 napi_poll net/core/dev.c:6578 [inline]
 net_rx_action+0x37e/0x730 net/core/dev.c:6689
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:934
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

read to 0xffff888127dbbd40 of 8 bytes by interrupt on cpu 1:
 br_fdb_update+0x110/0x3e0 net/bridge/br_fdb.c:866
 br_handle_frame_finish+0x2d3/0xbc0 net/bridge/br_input.c:121
 br_nf_hook_thresh+0x1ee/0x220
 br_nf_pre_routing_finish_ipv6+0x4fa/0x510
 NF_HOOK include/linux/netfilter.h:307 [inline]
 br_nf_pre_routing_ipv6+0x1ea/0x280 net/bridge/br_netfilter_ipv6.c:237
 br_nf_pre_routing+0x4c9/0xb20 net/bridge/br_netfilter_hooks.c:507
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:255 [inline]
 br_handle_frame+0x483/0x7d0 net/bridge/br_input.c:399
 __netif_receive_skb_core+0xa4e/0x1cc0 net/core/dev.c:5379
 __netif_receive_skb_one_core net/core/dev.c:5483 [inline]
 __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5599
 process_backlog+0x23f/0x3b0 net/core/dev.c:5927
 __napi_poll+0x65/0x390 net/core/dev.c:6511
 napi_poll net/core/dev.c:6578 [inline]
 net_rx_action+0x37e/0x730 net/core/dev.c:6689
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:934
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

value changed: 0x000000010000a631 -> 0x000000010000a632

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 6.0.0-rc6-syzkaller-00344-g5e049663f678-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
==================================================================
net_ratelimit: 1096 callbacks suppressed
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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:22:10:d1:80:0f:64, 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 veth0_to_bridge with own address as source address (addr:22:10:d1:80:0f:64, vlan:0)
net_ratelimit: 948 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:aa, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:aa, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:aa, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:aa, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:aa, vlan:0)