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BUG: KCSAN: data-race in __mod_timer / __mod_timer

write to 0xffff8881348d2490 of 8 bytes by interrupt on cpu 1:
 __mod_timer+0x720/0xc30 kernel/time/timer.c:1052
 mod_timer+0x1b/0x20 kernel/time/timer.c:1108
 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline]
 wg_timers_any_authenticated_packet_traversal+0xc4/0xf0 drivers/net/wireguard/timers.c:215
 wg_packet_consume_data_done drivers/net/wireguard/receive.c:361 [inline]
 wg_packet_rx_poll+0x865/0x11f0 drivers/net/wireguard/receive.c:481
 __napi_poll+0x65/0x3f0 net/core/dev.c:6365
 napi_poll net/core/dev.c:6432 [inline]
 net_rx_action+0x29e/0x650 net/core/dev.c:6519
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:921
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1bf/0x1e0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30

read to 0xffff8881348d2490 of 8 bytes by task 5 on cpu 0:
 __mod_timer+0x7c/0xc30 kernel/time/timer.c:980
 mod_timer+0x1b/0x20 kernel/time/timer.c:1108
 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline]
 wg_timers_any_authenticated_packet_traversal+0xc4/0xf0 drivers/net/wireguard/timers.c:215
 wg_packet_send_handshake_response+0xa6/0x110 drivers/net/wireguard/send.c:99
 wg_receive_handshake_packet drivers/net/wireguard/receive.c:161 [inline]
 wg_packet_handshake_receive_worker+0x41b/0x6e0 drivers/net/wireguard/receive.c:220
 process_one_work+0x3f6/0x960 kernel/workqueue.c:2307
 worker_thread+0x616/0xa70 kernel/workqueue.c:2454
 kthread+0x1bf/0x1e0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30

value changed: 0x00000000ffffe344 -> 0x00000000ffffe390

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.17.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: wg-kex-wg1 wg_packet_handshake_receive_worker
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