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BUG: KCSAN: data-race in can_send / can_send

read-write to 0xffff8881378d7af0 of 8 bytes by interrupt on cpu 1:
 can_send+0x56c/0x5d0 net/can/af_can.c:290
 bcm_can_tx+0x314/0x410 net/can/bcm.c:302
 bcm_tx_timeout_handler+0xdb/0x260
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x217/0x710 kernel/time/hrtimer.c:1752
 hrtimer_run_softirq+0xde/0x2b0 kernel/time/hrtimer.c:1769
 __do_softirq+0xc4/0x27b kernel/softirq.c:553
 run_ksoftirqd+0x17/0x20 kernel/softirq.c:921
 smpboot_thread_fn+0x30a/0x4a0 kernel/smpboot.c:164
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

read-write to 0xffff8881378d7af0 of 8 bytes by interrupt on cpu 0:
 can_send+0x56c/0x5d0 net/can/af_can.c:290
 bcm_can_tx+0x314/0x410 net/can/bcm.c:302
 bcm_tx_timeout_handler+0xdb/0x260
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x217/0x710 kernel/time/hrtimer.c:1752
 hrtimer_run_softirq+0xde/0x2b0 kernel/time/hrtimer.c:1769
 __do_softirq+0xc4/0x27b kernel/softirq.c:553
 do_softirq+0x5e/0x90 kernel/softirq.c:454
 __local_bh_enable_ip+0x66/0x70 kernel/softirq.c:381
 __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+0x217/0x260 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:2633 [inline]
 process_scheduled_works+0x5b8/0xa40 kernel/workqueue.c:2706
 worker_thread+0x525/0x730 kernel/workqueue.c:2787
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

value changed: 0x0000000000005dc9 -> 0x0000000000005dca

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 6952 Comm: kworker/u4:21 Not tainted 6.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: bat_events batadv_nc_worker
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