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BUG: KCSAN: data-race in io_sq_thread / io_sq_thread_park

write to 0xffff888139a930f8 of 8 bytes by task 24497 on cpu 0:
 io_sq_thread+0xa1a/0xaa0 io_uring/sqpoll.c:305
 ret_from_fork+0x1f/0x30

read to 0xffff888139a930f8 of 8 bytes by task 16201 on cpu 1:
 io_sq_thread_park+0x17/0x70 io_uring/sqpoll.c:45
 io_ring_exit_work+0xd1/0x3f0 io_uring/io_uring.c:2583
 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: 0xffff88813aa3a700 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16201 Comm: kworker/u4:20 Not tainted 6.0.0-rc6-syzkaller-00309-g1a61b828566f-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: events_unbound io_ring_exit_work
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