vxcan1: j1939_xtp_rx_rts_session_active: 0xffff888119b53400: connection exists (fe ff). last cmd: 20
vxcan1: j1939_xtp_rx_rts_session_active: 0xffff888119b53400: connection exists (fe ff). last cmd: 20
vxcan1: j1939_xtp_rx_rts_session_active: 0xffff888119b53400: connection exists (fe ff). last cmd: 20
==================================================================
BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv

read-write to 0xffff88811be6ef20 of 4 bytes by interrupt on cpu 1:
 can_can_gw_rcv+0x812/0x820 net/can/gw.c:572
 deliver net/can/af_can.c:575 [inline]
 can_rcv_filter+0xc3/0x480 net/can/af_can.c:602
 can_receive+0x13e/0x190 net/can/af_can.c:674
 can_rcv+0x17d/0x1f0 net/can/af_can.c:699
 __netif_receive_skb_one_core net/core/dev.c:6212 [inline]
 __netif_receive_skb net/core/dev.c:6325 [inline]
 process_backlog+0x354/0x680 net/core/dev.c:6676
 __napi_poll+0x61/0x300 net/core/dev.c:7735
 napi_poll net/core/dev.c:7798 [inline]
 net_rx_action+0x456/0x930 net/core/dev.c:7955
 handle_softirqs+0xb9/0x280 kernel/softirq.c:622
 do_softirq+0x45/0x60 kernel/softirq.c:523
 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:196 [inline]
 _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:214
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 release_sock+0x10c/0x180 net/core/sock.c:3869
 tcp_sock_set_nodelay+0x97/0xb0 net/ipv4/tcp.c:3682
 rds_tcp_tune+0x49/0x390 net/rds/tcp.c:518
 rds_tcp_conn_path_connect+0x1b1/0x5c0 net/rds/tcp_connect.c:137
 rds_connect_worker+0x12f/0x1b0 net/rds/threads.c:176
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x4d4/0x9a0 kernel/workqueue.c:3405
 worker_thread+0x569/0x750 kernel/workqueue.c:3486
 kthread+0x221/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read-write to 0xffff88811be6ef20 of 4 bytes by interrupt on cpu 0:
 can_can_gw_rcv+0x812/0x820 net/can/gw.c:572
 deliver net/can/af_can.c:575 [inline]
 can_rcv_filter+0xc3/0x480 net/can/af_can.c:602
 can_receive+0x13e/0x190 net/can/af_can.c:674
 can_rcv+0x17d/0x1f0 net/can/af_can.c:699
 __netif_receive_skb_one_core net/core/dev.c:6212 [inline]
 __netif_receive_skb net/core/dev.c:6325 [inline]
 process_backlog+0x354/0x680 net/core/dev.c:6676
 __napi_poll+0x61/0x300 net/core/dev.c:7735
 napi_poll net/core/dev.c:7798 [inline]
 net_rx_action+0x456/0x930 net/core/dev.c:7955
 handle_softirqs+0xb9/0x280 kernel/softirq.c:622
 do_softirq+0x45/0x60 kernel/softirq.c:523
 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:196 [inline]
 _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:214
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline]
 wg_packet_decrypt_worker+0x61d/0x660 drivers/net/wireguard/receive.c:499
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x4d4/0x9a0 kernel/workqueue.c:3405
 worker_thread+0x569/0x750 kernel/workqueue.c:3486
 kthread+0x221/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00103e57 -> 0x00103e58

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3378 Comm: kworker/0:3 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: wg-crypt-wg1 wg_packet_decrypt_worker
==================================================================
vxcan1: j1939_tp_rxtimer: 0xffff88811fde7000: abort rx timeout. Force session deactivation