syzbot

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BUG: KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests

write to 0xffff888136700038 of 8 bytes by task 21938 on cpu 0:
 io_sq_thread+0xb03/0xb80 io_uring/sqpoll.c:308
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

read to 0xffff888136700038 of 8 bytes by task 5927 on cpu 1:
 io_uring_try_cancel_requests+0x1b7/0x440 io_uring/io_uring.c:3292
 io_ring_exit_work+0x126/0x4f0 io_uring/io_uring.c:3079
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703
 worker_thread+0x525/0x730 kernel/workqueue.c:2784
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

value changed: 0xffff8881070230c0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 5927 Comm: kworker/u4:7 Tainted: G        W          6.6.0-rc1-syzkaller-00070-g23f108dc9ed2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events_unbound io_ring_exit_work
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