================================================================== BUG: KCSAN: data-race in insert_work / wq_worker_running read-write to 0xffff888237d2a7e0 of 4 bytes by task 1903 on cpu 1: wq_worker_running+0x96/0xe0 kernel/workqueue.c:880 schedule_timeout+0xc1/0x290 kernel/time/timer.c:1935 synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:569 [inline] synchronize_rcu_expedited_wait+0x22a/0xbc0 kernel/rcu/tree_exp.h:620 rcu_exp_wait_wake kernel/rcu/tree_exp.h:685 [inline] rcu_exp_sel_wait_wake+0x355/0x630 kernel/rcu/tree_exp.h:719 wait_rcu_exp_gp+0x1a/0x20 kernel/rcu/tree_exp.h:510 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 read to 0xffff888237d2a7e0 of 4 bytes by task 10212 on cpu 0: __need_more_worker kernel/workqueue.c:785 [inline] insert_work+0x10e/0x190 kernel/workqueue.c:1365 __queue_work+0x69e/0x8e0 kernel/workqueue.c:1517 queue_work_on+0x7e/0xe0 kernel/workqueue.c:1545 wg_queue_enqueue_per_peer_tx+0x10b/0x200 drivers/net/wireguard/queueing.h:191 wg_packet_encrypt_worker+0x8b4/0xab0 drivers/net/wireguard/send.c:305 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10212 Comm: kworker/0:3 Not tainted 5.19.0-rc7-syzkaller-00135-g68e77ffbfd06-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker ==================================================================