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BUG: KCSAN: data-race in __mod_timer / __mod_timer

write to 0xffff88811ad41750 of 8 bytes by task 3669 on cpu 1:
 __mod_timer+0x84e/0x990 kernel/time/timer.c:1078
 mod_timer+0x1f/0x30 kernel/time/timer.c:1195
 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline]
 wg_timers_any_authenticated_packet_traversal+0xd1/0x100 drivers/net/wireguard/timers.c:218
 wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline]
 wg_packet_tx_worker+0xeb/0x340 drivers/net/wireguard/send.c:276
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0x56a/0xa50 kernel/workqueue.c:3479
 worker_thread+0x569/0x750 kernel/workqueue.c:3560
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff88811ad41750 of 8 bytes by task 3407 on cpu 0:
 __mod_timer+0x69/0x990 kernel/time/timer.c:1038
 mod_timer+0x1f/0x30 kernel/time/timer.c:1195
 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline]
 wg_timers_any_authenticated_packet_traversal+0xd1/0x100 drivers/net/wireguard/timers.c:218
 wg_receive_handshake_packet drivers/net/wireguard/receive.c:202 [inline]
 wg_packet_handshake_receive_worker+0x47d/0x570 drivers/net/wireguard/receive.c:213
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0x56a/0xa50 kernel/workqueue.c:3479
 worker_thread+0x569/0x750 kernel/workqueue.c:3560
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x0000000100002ac6 -> 0x0000000100002aca

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3407 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: wg-kex-wg1 wg_packet_handshake_receive_worker
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