==================================================================
BUG: KCSAN: data-race in wg_index_hashtable_insert / wg_index_hashtable_lookup

write to 0xffff88811ac6ce4c of 4 bytes by task 3161 on cpu 1:
 wg_index_hashtable_insert+0xe3/0x2b0 drivers/net/wireguard/peerlookup.c:132
 wg_noise_handshake_create_response+0x6ed/0x790 drivers/net/wireguard/noise.c:713
 wg_packet_send_handshake_response+0x6d/0x120 drivers/net/wireguard/send.c:94
 wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline]
 wg_packet_handshake_receive_worker+0x3cc/0x5d0 drivers/net/wireguard/receive.c:213
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358
 worker_thread+0x581/0x770 kernel/workqueue.c:3439
 kthread+0x22a/0x280 kernel/kthread.c:467
 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff88811ac6ce4c of 4 bytes by task 32094 on cpu 0:
 wg_index_hashtable_lookup+0x6b/0x130 drivers/net/wireguard/peerlookup.c:211
 wg_noise_handshake_consume_response+0x12a/0x910 drivers/net/wireguard/noise.c:747
 wg_receive_handshake_packet drivers/net/wireguard/receive.c:166 [inline]
 wg_packet_handshake_receive_worker+0x3da/0x5d0 drivers/net/wireguard/receive.c:213
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358
 worker_thread+0x581/0x770 kernel/workqueue.c:3439
 kthread+0x22a/0x280 kernel/kthread.c:467
 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0xaa486204 -> 0x89582769

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 32094 Comm: kworker/0:3 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: wg-kex-wg1 wg_packet_handshake_receive_worker
==================================================================