bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 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 0xffff888118ca0ac0 of 8 bytes by interrupt on cpu 1: 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:5866 __netif_receive_skb_one_core net/core/dev.c:5977 [inline] __netif_receive_skb+0x59/0x270 net/core/dev.c:6092 process_backlog+0x229/0x420 net/core/dev.c:6444 __napi_poll+0x66/0x310 net/core/dev.c:7494 napi_poll net/core/dev.c:7557 [inline] net_rx_action+0x391/0x830 net/core/dev.c:7684 handle_softirqs+0xba/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] ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline] wg_packet_encrypt_worker+0xb44/0xb80 drivers/net/wireguard/send.c:293 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x4cb/0x9d0 kernel/workqueue.c:3319 worker_thread+0x582/0x770 kernel/workqueue.c:3400 kthread+0x489/0x510 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 0xffff888118ca0ac0 of 8 bytes by interrupt on cpu 0: 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:5866 __netif_receive_skb_one_core net/core/dev.c:5977 [inline] __netif_receive_skb+0x59/0x270 net/core/dev.c:6092 process_backlog+0x229/0x420 net/core/dev.c:6444 __napi_poll+0x66/0x310 net/core/dev.c:7494 napi_poll net/core/dev.c:7557 [inline] net_rx_action+0x391/0x830 net/core/dev.c:7684 handle_softirqs+0xba/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+0x4cb/0x9d0 kernel/workqueue.c:3319 worker_thread+0x582/0x770 kernel/workqueue.c:3400 kthread+0x489/0x510 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: 0x00000000fffff013 -> 0x00000000fffff014 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 1460 Comm: kworker/u8:6 Not tainted 6.17.0-rc1-syzkaller-00214-g99bade344cfa #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: bat_events batadv_tt_purge ================================================================== net_ratelimit: 7688 callbacks suppressed bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:ce:bb:f1:d5:bb:a7, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:ce:bb:f1:d5:bb:a7, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:ce:bb:f1:d5:bb:a7, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) net_ratelimit: 8176 callbacks suppressed bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:ce:bb:f1:d5:bb:a7, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:ce:bb:f1:d5:bb:a7, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)