================================================================== BUG: KCSAN: data-race in __io_fill_cqe_req / io_wake_function read-write to 0xffff88813ff84a50 of 4 bytes by task 4504 on cpu 1: io_get_cqe fs/io_uring.c:2233 [inline] __io_fill_cqe_req+0x242/0x5a0 fs/io_uring.c:2468 __io_req_complete_post fs/io_uring.c:2572 [inline] io_req_complete_post fs/io_uring.c:2582 [inline] __io_req_complete fs/io_uring.c:2602 [inline] io_send fs/io_uring.c:6214 [inline] io_issue_sqe+0x7ef7/0xaac0 fs/io_uring.c:8360 io_wq_submit_work+0x41b/0x590 fs/io_uring.c:8526 io_worker_handle_work+0x517/0xc50 fs/io-wq.c:597 io_wqe_worker+0x1d1/0x940 fs/io-wq.c:644 ret_from_fork+0x1f/0x30 read to 0xffff88813ff84a50 of 4 bytes by task 4293 on cpu 0: io_should_wake fs/io_uring.c:9294 [inline] io_wake_function+0x36/0x100 fs/io_uring.c:9314 __wake_up_common+0xbc/0x130 kernel/sched/wait.c:107 __wake_up_common_lock kernel/sched/wait.c:137 [inline] __wake_up+0x80/0xc0 kernel/sched/wait.c:156 io_cqring_wake fs/io_uring.c:2276 [inline] io_cqring_ev_posted fs/io_uring.c:2292 [inline] io_req_complete_post fs/io_uring.c:2585 [inline] __io_req_complete fs/io_uring.c:2602 [inline] io_send fs/io_uring.c:6214 [inline] io_issue_sqe+0x7fe6/0xaac0 fs/io_uring.c:8360 io_wq_submit_work+0x41b/0x590 fs/io_uring.c:8526 io_worker_handle_work+0x517/0xc50 fs/io-wq.c:597 io_wqe_worker+0x1d1/0x940 fs/io-wq.c:644 ret_from_fork+0x1f/0x30 value changed: 0x00000b21 -> 0x00000b22 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4293 Comm: iou-wrk-4058 Not tainted 5.19.0-rc6-syzkaller-00418-g972a278fe60c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ==================================================================