syzbot

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BUG: KCSAN: data-race in io_sq_thread / io_sq_thread_park

write to 0xffff888107d69db8 of 8 bytes by task 17320 on cpu 0:
 io_sq_thread+0xa89/0xb10 io_uring/sqpoll.c:305
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888107d69db8 of 8 bytes by task 4568 on cpu 1:
 io_sq_thread_park+0x1b/0x80 io_uring/sqpoll.c:45
 io_ring_exit_work+0x178/0x4c0 io_uring/io_uring.c:2989
 process_one_work+0x3e6/0x750 kernel/workqueue.c:2390
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2537
 kthread+0x1ac/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

value changed: 0xffff88811f476ec0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 4568 Comm: kworker/u4:7 Not tainted 6.3.0-rc1-syzkaller-00019-g6a98c9cae232 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events_unbound io_ring_exit_work
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