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BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

read-write to 0xffff888127a46870 of 4 bytes by task 15738 on cpu 1:
 io_get_sqe fs/io_uring.c:9037 [inline]
 io_submit_sqes+0x1f2/0x500 fs/io_uring.c:9083
 __do_sys_io_uring_enter fs/io_uring.c:12040 [inline]
 __se_sys_io_uring_enter+0x24b/0xd60 fs/io_uring.c:11966
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:11966
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffff888127a46870 of 4 bytes by task 15723 on cpu 0:
 io_sqring_full fs/io_uring.c:2184 [inline]
 io_uring_poll+0x8d/0x150 fs/io_uring.c:11205
 vfs_poll include/linux/poll.h:88 [inline]
 do_pollfd fs/select.c:873 [inline]
 do_poll fs/select.c:921 [inline]
 do_sys_poll+0x6d5/0xca0 fs/select.c:1015
 __do_sys_ppoll fs/select.c:1121 [inline]
 __se_sys_ppoll+0x195/0x1d0 fs/select.c:1101
 __x64_sys_ppoll+0x63/0x70 fs/select.c:1101
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0x00000319 -> 0x00000321

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 15723 Comm: syz-executor.2 Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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