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BUG: KCSAN: data-race in __io_fill_cqe_req / io_wake_function

write to 0xffff888107fa3200 of 4 bytes by task 16672 on cpu 0:
 io_get_cqe fs/io_uring.c:1812 [inline]
 __io_fill_cqe fs/io_uring.c:2022 [inline]
 __io_fill_cqe_req+0x129/0x3a0 fs/io_uring.c:2035
 __io_req_complete_post+0x65/0x580 fs/io_uring.c:2058
 io_req_complete_post fs/io_uring.c:2092 [inline]
 __io_req_complete fs/io_uring.c:2112 [inline]
 io_sendmsg fs/io_uring.c:5254 [inline]
 io_issue_sqe+0x548b/0x8670 fs/io_uring.c:7142
 io_wq_submit_work+0x249/0x2d0 fs/io_uring.c:7295
 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 0xffff888107fa3200 of 4 bytes by task 16649 on cpu 1:
 io_should_wake fs/io_uring.c:8059 [inline]
 io_wake_function+0x36/0x100 fs/io_uring.c:8079
 __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_issue_sqe+0x7707/0x8670
 io_wq_submit_work+0x249/0x2d0 fs/io_uring.c:7295
 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: 0x000001cf -> 0x000001d0

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16649 Comm: iou-wrk-16628 Tainted: G        W         5.18.0-rc2-syzkaller-00050-ga19944809fe9-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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