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) ================================================================== BUG: KCSAN: data-race in br_fdb_update / br_fdb_update write to 0xffff888116d1c4c0 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 kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x3a/0xc0 kernel/softirq.c:680 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x74/0x80 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 finish_task_switch+0xb6/0x2b0 kernel/sched/core.c:5225 context_switch kernel/sched/core.c:5360 [inline] __schedule+0x6b9/0xb30 kernel/sched/core.c:6961 preempt_schedule_common kernel/sched/core.c:7145 [inline] __cond_resched+0x4e/0x90 kernel/sched/core.c:7490 might_resched include/linux/kernel.h:61 [inline] down_read+0x13/0xe0 kernel/locking/rwsem.c:1536 wg_cookie_add_mac_to_packet+0x14b/0x2d0 drivers/net/wireguard/cookie.c:169 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:35 [inline] wg_packet_handshake_send_worker+0xd0/0x160 drivers/net/wireguard/send.c:51 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 read to 0xffff888116d1c4c0 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] nsim_dev_trap_report drivers/net/netdevsim/dev.c:835 [inline] nsim_dev_trap_report_work+0x52b/0x630 drivers/net/netdevsim/dev.c:866 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: 0x000000010001d4e9 -> 0x000000010001d4ea Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3573 Comm: kworker/u8:15 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: events_unbound nsim_dev_trap_report_work ================================================================== net_ratelimit: 2112 callbacks suppressed 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: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:0c, vlan:0) bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0) net_ratelimit: 2220 callbacks suppressed 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: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:0c, vlan:0) bridge0: received packet on bond0 with own address as source address (addr:aa:aa:aa:aa:aa:1d, vlan:0)