syzbot

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BUG: KCSAN: data-race in io_clean_op / io_wq_free_work

write to 0xffff88812273b758 of 4 bytes by task 5174 on cpu 1:
 io_clean_op+0x3aa/0x3e0 fs/io_uring.c:6632
 io_req_complete_state fs/io_uring.c:1827 [inline]
 io_req_task_complete+0xb2/0x1e0 fs/io_uring.c:2667
 tctx_task_work+0x275/0x4d0 fs/io_uring.c:2156
 task_work_run+0xae/0x130 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:214 [inline]
 handle_signal_work kernel/entry/common.c:146 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0xf8/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88812273b758 of 4 bytes by task 5184 on cpu 0:
 req_ref_put_and_test fs/io_uring.c:1150 [inline]
 io_put_req_find_next fs/io_uring.c:2355 [inline]
 io_wq_free_work+0x1e/0xd0 fs/io_uring.c:6774
 io_worker_handle_work+0x7e2/0xa20 fs/io-wq.c:518
 io_wqe_worker+0x1b9/0x540 fs/io-wq.c:566
 ret_from_fork+0x1f/0x30

value changed: 0x008c0102 -> 0x00890102

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5184 Comm: iou-wrk-5174 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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