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BUG: KCSAN: data-race in __queue_work / wq_worker_running

read-write to 0xffff888237d2d164 of 4 bytes by task 3359 on cpu 1:
 wq_worker_running+0x98/0x120 kernel/workqueue.c:1265
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:6874
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x368/0x8d0 kernel/locking/mutex.c:752
 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1040
 mutex_lock+0x28/0x30 kernel/locking/mutex.c:286
 rtnl_lock+0x15/0x20 net/core/rtnetlink.c:79
 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
 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:243

read to 0xffff888237d2d164 of 4 bytes by task 3341 on cpu 0:
 need_more_worker kernel/workqueue.c:835 [inline]
 kick_pool kernel/workqueue.c:1118 [inline]
 __queue_work+0x7ce/0xbb0 kernel/workqueue.c:1803
 queue_work_on+0x95/0xf0 kernel/workqueue.c:1837
 wg_queue_enqueue_per_peer_tx+0x127/0x270 drivers/net/wireguard/queueing.h:188
 wg_packet_encrypt_worker+0x885/0xa30 drivers/net/wireguard/send.c:305
 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:243

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3341 Comm: kworker/0:13 Not tainted 6.8.0-rc7-syzkaller-00229-g10d48d70e82d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker
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