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BUG: KCSAN: data-race in __io_fill_cqe / io_wake_function

write to 0xffff8881325b0200 of 4 bytes by task 5495 on cpu 0:
 io_get_cqe fs/io_uring.c:1725 [inline]
 __io_fill_cqe+0xf9/0x380 fs/io_uring.c:1915
 __io_req_complete_post+0x6c/0x420 fs/io_uring.c:1944
 io_req_complete_post fs/io_uring.c:1972 [inline]
 __io_req_complete fs/io_uring.c:1992 [inline]
 io_sendmsg fs/io_uring.c:4961 [inline]
 io_issue_sqe+0x4df5/0x9610 fs/io_uring.c:6771
 io_wq_submit_work+0x1c5/0x370 fs/io_uring.c:6916
 io_worker_handle_work+0x51b/0xc10 fs/io-wq.c:588
 io_wqe_worker+0x1bc/0x4f0 fs/io-wq.c:639
 ret_from_fork+0x1f/0x30

read to 0xffff8881325b0200 of 4 bytes by task 5497 on cpu 1:
 io_should_wake fs/io_uring.c:7658 [inline]
 io_wake_function+0x36/0x100 fs/io_uring.c:7678
 __wake_up_common+0xbc/0x130 kernel/sched/wait.c:108
 __wake_up_common_lock kernel/sched/wait.c:138 [inline]
 __wake_up+0x80/0xc0 kernel/sched/wait.c:157
 io_cqring_ev_posted fs/io_uring.c:1753 [inline]
 io_req_complete_post fs/io_uring.c:1975 [inline]
 __io_req_complete fs/io_uring.c:1992 [inline]
 io_sendmsg fs/io_uring.c:4961 [inline]
 io_issue_sqe+0x4e9b/0x9610 fs/io_uring.c:6771
 io_wq_submit_work+0x1c5/0x370 fs/io_uring.c:6916
 io_worker_handle_work+0x51b/0xc10 fs/io-wq.c:588
 io_wqe_worker+0x1bc/0x4f0 fs/io-wq.c:639
 ret_from_fork+0x1f/0x30

value changed: 0x0000039b -> 0x0000039c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 5497 Comm: iou-wrk-4631 Not tainted 5.17.0-rc5-syzkaller-00306-g2293be58d6a1-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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