================================================================== BUG: KCSAN: data-race in can_receive / can_receive read-write to 0xffff8881166f0778 of 8 bytes by interrupt on cpu 0: can_receive+0x1ca/0x1f0 net/can/af_can.c:673 can_rcv+0xe7/0x180 net/can/af_can.c:688 __netif_receive_skb_one_core net/core/dev.c:5672 [inline] __netif_receive_skb+0x123/0x280 net/core/dev.c:5785 process_backlog+0x22e/0x440 net/core/dev.c:6117 __napi_poll+0x63/0x3c0 net/core/dev.c:6883 napi_poll net/core/dev.c:6952 [inline] net_rx_action+0x3a1/0x7f0 net/core/dev.c:7074 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:950 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read-write to 0xffff8881166f0778 of 8 bytes by interrupt on cpu 1: can_receive+0x1ca/0x1f0 net/can/af_can.c:673 can_rcv+0xe7/0x180 net/can/af_can.c:688 __netif_receive_skb_one_core net/core/dev.c:5672 [inline] __netif_receive_skb+0x123/0x280 net/core/dev.c:5785 process_backlog+0x22e/0x440 net/core/dev.c:6117 __napi_poll+0x63/0x3c0 net/core/dev.c:6883 napi_poll net/core/dev.c:6952 [inline] net_rx_action+0x3a1/0x7f0 net/core/dev.c:7074 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:950 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00000000000002b7 -> 0x00000000000002b8 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== vcan0: j1939_tp_rxtimer: 0xffff88812c871400: rx timeout, send abort vcan0: j1939_tp_rxtimer: 0xffff88812c870e00: rx timeout, send abort vcan0: j1939_xtp_rx_abort_one: 0xffff88812c871400: 0x00000: (3) A timeout occurred and this is the connection abort to close the session. vcan0: j1939_xtp_rx_abort_one: 0xffff88812c870e00: 0x00000: (3) A timeout occurred and this is the connection abort to close the session.