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BUG: KCSAN: data-race in io_sq_thread / io_sq_thread_park

write to 0xffff8881493b20f8 of 8 bytes by task 10973 on cpu 1:
 io_sq_thread+0xafc/0xbd0 fs/io_uring.c:8060
 ret_from_fork+0x1f/0x30

read to 0xffff8881493b20f8 of 8 bytes by task 1954 on cpu 0:
 io_sq_thread_park+0x17/0x70 fs/io_uring.c:8504
 io_ring_exit_work+0xa5/0x3cb fs/io_uring.c:10078
 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: 0xffff888138a66300 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1954 Comm: kworker/u4:7 Not tainted 5.18.0-rc6-syzkaller-00009-gfeb9c5e19e91 #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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