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BUG: KCSAN: data-race in __io_fill_cqe_req / io_wake_function

write to 0xffff888137691a00 of 4 bytes by task 19972 on cpu 0:
 io_get_cqe fs/io_uring.c:1866 [inline]
 __io_fill_cqe fs/io_uring.c:2076 [inline]
 __io_fill_cqe_req+0x129/0x3a0 fs/io_uring.c:2089
 __io_req_complete_post+0x65/0x520 fs/io_uring.c:2112
 io_req_complete_post fs/io_uring.c:2146 [inline]
 __io_req_complete fs/io_uring.c:2166 [inline]
 io_poll_update fs/io_uring.c:6533 [inline]
 io_issue_sqe+0x62d1/0x8790 fs/io_uring.c:7267
 io_wq_submit_work+0x1d5/0x380 fs/io_uring.c:7421
 io_worker_handle_work+0x528/0xc20 fs/io-wq.c:597
 io_wqe_worker+0x1e6/0x540 fs/io-wq.c:644
 ret_from_fork+0x1f/0x30

read to 0xffff888137691a00 of 4 bytes by task 19974 on cpu 1:
 io_should_wake fs/io_uring.c:8187 [inline]
 io_wake_function+0x36/0x100 fs/io_uring.c:8207
 __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+0x7477/0x8790
 io_wq_submit_work+0x1d5/0x380 fs/io_uring.c:7421
 io_worker_handle_work+0x528/0xc20 fs/io-wq.c:597
 io_wqe_worker+0x1e6/0x540 fs/io-wq.c:644
 ret_from_fork+0x1f/0x30

value changed: 0x00001803 -> 0x00001804

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19974 Comm: iou-wrk-19966 Not tainted 5.18.0-rc1-syzkaller-00016-g3e732ebf7316-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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