RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000005b2a RSI: 0000000000000359 RDI: 0000000000000004
RBP: 00007f5965b301d0 R08: 0000000020000200 R09: 0000000000000008
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffed2d1801f R14: 00007f5965b30300 R15: 0000000000022000
==================================================================
BUG: KCSAN: data-race in __io_cqring_fill_event / io_cqring_wait

write to 0xffff88813eed7c00 of 4 bytes by task 29777 on cpu 1:
 io_get_cqe fs/io_uring.c:1424 [inline]
 __io_cqring_fill_event+0xfb/0x350 fs/io_uring.c:1606
 io_req_complete_post+0x55/0x5c0 fs/io_uring.c:1630
 __io_req_complete fs/io_uring.c:1682 [inline]
 __io_complete_rw+0x3e1/0x4a0 fs/io_uring.c:2501
 io_complete_rw+0x1b/0x20 fs/io_uring.c:2508
 io_rw_done fs/io_uring.c:2760 [inline]
 kiocb_done+0x18a/0x3f0 fs/io_uring.c:2784
 io_read fs/io_uring.c:3365 [inline]
 io_issue_sqe+0x3108/0x64b0 fs/io_uring.c:6180
 io_wq_submit_work+0x113/0x1f0 fs/io_uring.c:6305
 io_worker_handle_work+0x8cb/0xaf0 fs/io-wq.c:525
 io_wqe_worker+0x184/0x4b0 fs/io-wq.c:574
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

read to 0xffff88813eed7c00 of 4 bytes by task 29770 on cpu 0:
 __io_cqring_events fs/io_uring.c:1408 [inline]
 io_cqring_events fs/io_uring.c:2197 [inline]
 io_should_wake fs/io_uring.c:6990 [inline]
 io_cqring_wait_schedule fs/io_uring.c:7029 [inline]
 io_cqring_wait+0x582/0x8a0 fs/io_uring.c:7099
 __do_sys_io_uring_enter fs/io_uring.c:9415 [inline]
 __se_sys_io_uring_enter+0x643/0xb20 fs/io_uring.c:9332
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:9332
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000219 -> 0x0000021a

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 29770 Comm: syz-executor.1 Tainted: G        W         5.14.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================