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BUG: KCSAN: data-race in kick_pool / wq_worker_running

read-write to 0xffff888237d29d24 of 4 bytes by task 1047 on cpu 1:
 wq_worker_running+0x95/0x120 kernel/workqueue.c:1400
 synchronize_rcu_expedited+0x611/0x790 kernel/rcu/tree_exp.h:1013
 synchronize_net net/core/dev.c:11927 [inline]
 unregister_netdevice_many_notify+0x7cb/0x1690 net/core/dev.c:12058
 unregister_netdevice_many net/core/dev.c:12140 [inline]
 unregister_netdevice_queue+0x1f5/0x220 net/core/dev.c:11984
 unregister_netdevice include/linux/netdevice.h:3379 [inline]
 ser_release+0x123/0x170 drivers/net/caif/caif_serial.c:296
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3321
 worker_thread+0x582/0x770 kernel/workqueue.c:3402
 kthread+0x486/0x510 kernel/kthread.c:464
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888237d29d24 of 4 bytes by task 2959 on cpu 0:
 need_more_worker kernel/workqueue.c:934 [inline]
 kick_pool+0x49/0x2d0 kernel/workqueue.c:1240
 __queue_work+0x8d6/0xb60 kernel/workqueue.c:2342
 queue_work_on+0xd1/0x160 kernel/workqueue.c:2392
 wg_queue_enqueue_per_peer_tx+0x119/0x270 drivers/net/wireguard/queueing.h:188
 wg_packet_encrypt_worker+0x9e1/0xb80 drivers/net/wireguard/send.c:305
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3321
 worker_thread+0x582/0x770 kernel/workqueue.c:3402
 kthread+0x486/0x510 kernel/kthread.c:464
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 2959 Comm: kworker/0:2 Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker
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