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BUG: KCSAN: data-race in can_send / can_send

read-write to 0xffff888122d13510 of 8 bytes by interrupt on cpu 0:
 can_send+0x55c/0x5d0 net/can/af_can.c:289
 j1939_send_one+0x19c/0x1d0 net/can/j1939/main.c:357
 j1939_tp_tx_dat net/can/j1939/transport.c:646 [inline]
 j1939_session_tx_dat net/can/j1939/transport.c:838 [inline]
 j1939_xtp_txnext_transmiter net/can/j1939/transport.c:900 [inline]
 j1939_tp_txtimer+0xca9/0x1a70 net/can/j1939/transport.c:1160
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1751
 hrtimer_run_softirq+0xe4/0x2d0 kernel/time/hrtimer.c:1768
 handle_softirqs+0xc8/0x290 kernel/softirq.c:554
 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:928
 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 0xffff888122d13510 of 8 bytes by interrupt on cpu 1:
 can_send+0x55c/0x5d0 net/can/af_can.c:289
 j1939_send_one+0x19c/0x1d0 net/can/j1939/main.c:357
 j1939_tp_tx_dat net/can/j1939/transport.c:646 [inline]
 j1939_session_tx_dat net/can/j1939/transport.c:838 [inline]
 j1939_xtp_txnext_transmiter net/can/j1939/transport.c:900 [inline]
 j1939_tp_txtimer+0xca9/0x1a70 net/can/j1939/transport.c:1160
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1751
 hrtimer_run_softirq+0xe4/0x2d0 kernel/time/hrtimer.c:1768
 handle_softirqs+0xc8/0x290 kernel/softirq.c:554
 do_softirq+0x5e/0x90 kernel/softirq.c:455
 __local_bh_enable_ip+0x6e/0x70 kernel/softirq.c:382
 __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_nc_purge_paths+0x21d/0x270 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x3db/0xac0 net/batman-adv/network-coding.c:720
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3312
 worker_thread+0x526/0x730 kernel/workqueue.c:3393
 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: 0x00000000000012d4 -> 0x00000000000012d6

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 4469 Comm: kworker/u8:14 Tainted: G        W          6.9.0-syzkaller-10713-g2a8120d7b482 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: bat_events batadv_nc_worker
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