syzbot

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BUG: KCSAN: data-race in wg_queue_enqueue_per_peer_tx / wg_queue_enqueue_per_peer_tx

write to 0xffff888139654ee8 of 4 bytes by task 4550 on cpu 0:
 wg_cpumask_choose_online drivers/net/wireguard/queueing.h:115 [inline]
 wg_queue_enqueue_per_peer_tx+0x25b/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:2630 [inline]
 process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703
 worker_thread+0x525/0x730 kernel/workqueue.c:2784
 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:242

read to 0xffff888139654ee8 of 4 bytes by task 3194 on cpu 1:
 wg_cpumask_choose_online drivers/net/wireguard/queueing.h:107 [inline]
 wg_queue_enqueue_per_peer_tx+0x9d/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:2630 [inline]
 process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703
 worker_thread+0x525/0x730 kernel/workqueue.c:2784
 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:242

value changed: 0x00000002 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3194 Comm: kworker/1:7 Not tainted 6.7.0-rc3-syzkaller-00298-g1b8af6552cb7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: wg-crypt-wg2 wg_packet_encrypt_worker
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