bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
==================================================================
BUG: KCSAN: data-race in br_fdb_update / br_fdb_update

read to 0xffff888104788ec0 of 8 bytes by interrupt on cpu 0:
 br_fdb_update+0x106/0x460 net/bridge/br_fdb.c:903
 br_handle_frame_finish+0x31a/0xf50 net/bridge/br_input.c:144
 nf_hook_bridge_pre net/bridge/br_input.c:305 [inline]
 br_handle_frame+0x5d1/0x9e0 net/bridge/br_input.c:434
 __netif_receive_skb_core+0xad3/0x23b0 net/core/dev.c:5878
 __netif_receive_skb_one_core net/core/dev.c:5989 [inline]
 __netif_receive_skb+0x59/0x270 net/core/dev.c:6104
 process_backlog+0x229/0x420 net/core/dev.c:6456
 __napi_poll+0x63/0x310 net/core/dev.c:7506
 napi_poll net/core/dev.c:7569 [inline]
 net_rx_action+0x391/0x830 net/core/dev.c:7696
 handle_softirqs+0xb7/0x290 kernel/softirq.c:579
 do_softirq+0x5d/0x90 kernel/softirq.c:480
 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:407
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_tt_global_purge net/batman-adv/translation-table.c:2250 [inline]
 batadv_tt_purge+0x2cd/0x610 net/batman-adv/translation-table.c:3510
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3319
 worker_thread+0x582/0x770 kernel/workqueue.c:3400
 kthread+0x486/0x510 kernel/kthread.c:463
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

write to 0xffff888104788ec0 of 8 bytes by interrupt on cpu 1:
 br_fdb_update+0x13e/0x460 net/bridge/br_fdb.c:904
 br_handle_frame_finish+0x31a/0xf50 net/bridge/br_input.c:144
 nf_hook_bridge_pre net/bridge/br_input.c:305 [inline]
 br_handle_frame+0x5d1/0x9e0 net/bridge/br_input.c:434
 __netif_receive_skb_core+0xad3/0x23b0 net/core/dev.c:5878
 __netif_receive_skb_one_core net/core/dev.c:5989 [inline]
 __netif_receive_skb+0x59/0x270 net/core/dev.c:6104
 process_backlog+0x229/0x420 net/core/dev.c:6456
 __napi_poll+0x63/0x310 net/core/dev.c:7506
 napi_poll net/core/dev.c:7569 [inline]
 net_rx_action+0x391/0x830 net/core/dev.c:7696
 handle_softirqs+0xb7/0x290 kernel/softirq.c:579
 do_softirq+0x5d/0x90 kernel/softirq.c:480
 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:407
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 macvlan_process_broadcast+0x12d/0x310 drivers/net/macvlan.c:333
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3319
 worker_thread+0x582/0x770 kernel/workqueue.c:3400
 kthread+0x486/0x510 kernel/kthread.c:463
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x000000010000347d -> 0x000000010000347e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 7340 Comm: kworker/u8:14 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound macvlan_process_broadcast
==================================================================
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)