==================================================================
BUG: KCSAN: data-race in br_fdb_update / br_fdb_update
read to 0xffff88813e4830c0 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
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x54e/0x7d0 net/bridge/br_input.c:399
__netif_receive_skb_core+0xa4e/0x1ce0 net/core/dev.c:5383
__netif_receive_skb_one_core net/core/dev.c:5487 [inline]
__netif_receive_skb+0x52/0x1b0 net/core/dev.c:5603
process_backlog+0x23f/0x3b0 net/core/dev.c:5931
__napi_poll+0x65/0x390 net/core/dev.c:6498
napi_poll net/core/dev.c:6565 [inline]
net_rx_action+0x37e/0x730 net/core/dev.c:6676
__do_softirq+0xf2/0x2c7 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
write to 0xffff88813e4830c0 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
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x54e/0x7d0 net/bridge/br_input.c:399
__netif_receive_skb_core+0xa4e/0x1ce0 net/core/dev.c:5383
__netif_receive_skb_one_core net/core/dev.c:5487 [inline]
__netif_receive_skb+0x52/0x1b0 net/core/dev.c:5603
process_backlog+0x23f/0x3b0 net/core/dev.c:5931
__napi_poll+0x65/0x390 net/core/dev.c:6498
napi_poll net/core/dev.c:6565 [inline]
net_rx_action+0x37e/0x730 net/core/dev.c:6676
__do_softirq+0xf2/0x2c7 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: 0x00000001000149e8 -> 0x00000001000149e9
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12 Comm: ksoftirqd/0 Not tainted 6.1.0-rc4-syzkaller-00011-g59f2f4b8a757-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
==================================================================
net_ratelimit: 17415 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:32:f3:8b:af:16:8f, 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:1b, 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:32:f3:8b:af:16:8f, 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:1b, 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:32:f3:8b:af:16:8f, vlan:0)
net_ratelimit: 18092 callbacks suppressed
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:1b, 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:32:f3:8b:af:16:8f, 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:1b, 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:32:f3:8b:af:16:8f, 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:1b, vlan:0)