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BUG: KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests

write to 0xffff88811867eab8 of 8 bytes by task 4468 on cpu 1:
 io_sq_thread+0xb19/0xc00 fs/io_uring.c:7635
 ret_from_fork+0x1f/0x30

read to 0xffff88811867eab8 of 8 bytes by task 1824 on cpu 0:
 io_uring_try_cancel_requests+0x1ab/0x308 fs/io_uring.c:9775
 io_ring_exit_work+0x79/0x3c7 fs/io_uring.c:9571
 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: 0xffff888117fce700 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1824 Comm: kworker/u4:3 Not tainted 5.17.0-rc4-syzkaller-00069-ga3580ac9b7a3-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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