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BUG: KCSAN: data-race in io_sq_thread / io_sq_thread_park

write to 0xffff888138135038 of 8 bytes by task 7779 on cpu 1:
 io_sq_thread+0xa2a/0xac0 fs/io_uring.c:9348
 ret_from_fork+0x1f/0x30

read to 0xffff888138135038 of 8 bytes by task 11385 on cpu 0:
 io_sq_thread_park+0x17/0x70 fs/io_uring.c:9825
 io_ring_exit_work+0xa5/0x3cb fs/io_uring.c:11354
 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: 0xffff88811d696400 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 11385 Comm: kworker/u4:40 Not tainted 5.18.0-syzkaller-13818-gd0e60d46bc03-dirty #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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