================================================================== BUG: KCSAN: data-race in __mod_timer / __mod_timer write to 0xffff888144fed150 of 8 bytes by task 11209 on cpu 0: __mod_timer+0x5a1/0x840 kernel/time/timer.c:1126 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+0xd0/0x100 drivers/net/wireguard/timers.c:218 wg_packet_consume_data_done drivers/net/wireguard/receive.c:354 [inline] wg_packet_rx_poll+0x7f5/0x1160 drivers/net/wireguard/receive.c:474 __napi_poll+0x66/0x310 net/core/dev.c:7506 napi_threaded_poll_loop+0x18a/0x4a0 net/core/dev.c:7625 napi_threaded_poll+0xda/0x160 net/core/dev.c:7652 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x11f/0x1b0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read to 0xffff888144fed150 of 8 bytes by task 3365 on cpu 1: __mod_timer+0x69/0x840 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+0xd0/0x100 drivers/net/wireguard/timers.c:218 wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline] wg_packet_tx_worker+0xeb/0x330 drivers/net/wireguard/send.c:276 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x4cb/0x9d0 kernel/workqueue.c:3319 worker_thread+0x582/0x770 kernel/workqueue.c:3400 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x11f/0x1b0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x00000001000147c5 -> 0x0000000100014a84 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3365 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: wg-crypt-wg1 wg_packet_tx_worker ==================================================================