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BUG: KCSAN: data-race in io_sq_thread / io_sq_thread_park

write to 0xffff8881090467b8 of 8 bytes by task 9130 on cpu 0:
 io_sq_thread+0xb19/0xc00 fs/io_uring.c:7555
 ret_from_fork+0x1f/0x30

read to 0xffff8881090467b8 of 8 bytes by task 43 on cpu 1:
 io_sq_thread_park+0x17/0x70 fs/io_uring.c:7985
 io_ring_exit_work+0x9c/0x3c7 fs/io_uring.c:9492
 process_one_work+0x3fc/0x980 kernel/workqueue.c:2298
 worker_thread+0x616/0xa70 kernel/workqueue.c:2445
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

value changed: 0xffff8881351ad000 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 43 Comm: kworker/u4:2 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound io_ring_exit_work
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