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BUG: KCSAN: data-race in can_send / can_stat_update

read to 0xffff88812a874ff0 of 8 bytes by interrupt on cpu 0:
 can_stat_update+0x4cc/0x6f0 net/can/proc.c:157
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1474
 expire_timers+0x116/0x240 kernel/time/timer.c:1519
 __run_timers+0x350/0x400 kernel/time/timer.c:1790
 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1803
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 __irq_exit_rcu kernel/softirq.c:650 [inline]
 irq_exit_rcu+0x41/0x70 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20
 kcsan_setup_watchpoint+0x3e9/0x3f0 kernel/kcsan/core.c:694
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:406 [inline]
 batadv_nc_worker+0x78/0xc00 net/batman-adv/network-coding.c:719
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 worker_thread+0x618/0xa70 kernel/workqueue.c:2436
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

read-write to 0xffff88812a874ff0 of 8 bytes by interrupt on cpu 1:
 can_send+0x484/0x500 net/can/af_can.c:291
 bcm_can_tx+0x2f0/0x3e0 net/can/bcm.c:301
 bcm_tx_timeout_handler+0xce/0x250
 __run_hrtimer+0x132/0x420 kernel/time/hrtimer.c:1685
 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline]
 hrtimer_run_softirq+0x1e9/0x480 kernel/time/hrtimer.c:1766
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:934
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

value changed: 0x00000000000006f3 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 6.0.0-rc3-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
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