================================================================== BUG: KCSAN: data-race in kick_pool / wq_worker_running read-write to 0xffff888237d29d24 of 4 bytes by task 3415 on cpu 1: wq_worker_running+0x95/0x120 kernel/workqueue.c:1400 schedule_timeout+0xb7/0x170 kernel/time/sleep_timeout.c:99 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common+0xfa/0x1e0 kernel/sched/completion.c:127 usb_start_wait_urb+0xd6/0x190 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x18f/0x250 drivers/usb/core/message.c:154 get_port_status drivers/usb/core/hub.c:605 [inline] hub_ext_port_status+0xc0/0x480 drivers/usb/core/hub.c:622 usb_hub_port_status drivers/usb/core/hub.c:672 [inline] port_event drivers/usb/core/hub.c:5728 [inline] hub_event+0x46c/0x2940 drivers/usb/core/hub.c:5917 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3321 worker_thread+0x582/0x770 kernel/workqueue.c:3402 kthread+0x486/0x510 kernel/kthread.c:464 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read to 0xffff888237d29d24 of 4 bytes by task 3375 on cpu 0: need_more_worker kernel/workqueue.c:934 [inline] kick_pool+0x49/0x2d0 kernel/workqueue.c:1240 __queue_work+0x8d6/0xb60 kernel/workqueue.c:2342 queue_work_on+0xd1/0x160 kernel/workqueue.c:2392 wg_queue_enqueue_per_peer_tx+0x119/0x270 drivers/net/wireguard/queueing.h:188 wg_packet_encrypt_worker+0x9e1/0xb80 drivers/net/wireguard/send.c:305 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3321 worker_thread+0x582/0x770 kernel/workqueue.c:3402 kthread+0x486/0x510 kernel/kthread.c:464 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3375 Comm: kworker/0:2 Tainted: G W 6.16.0-rc3-syzkaller-00042-g78f4e737a53e #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker ==================================================================