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BUG: KCSAN: data-race in io_sq_thread / io_sq_thread_park

write to 0xffff88811da8d878 of 8 bytes by task 10567 on cpu 1:
 io_sq_thread+0xb19/0xc00 fs/io_uring.c:7636
 ret_from_fork+0x1f/0x30

read to 0xffff88811da8d878 of 8 bytes by task 1831 on cpu 0:
 io_sq_thread_park+0x17/0x70 fs/io_uring.c:8066
 io_ring_exit_work+0x9c/0x3c7 fs/io_uring.c:9573
 process_one_work+0x3f6/0x960 kernel/workqueue.c:2307
 worker_thread+0x616/0xa70 kernel/workqueue.c:2454
 kthread+0x1bf/0x1e0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30

value changed: 0xffff888108910900 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1831 Comm: kworker/u4:3 Not tainted 5.17.0-rc1-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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