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BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

read-write to 0xffff8881cb51d070 of 4 bytes by task 7031 on cpu 0:
 io_get_sqe io_uring/io_uring.c:2066 [inline]
 io_submit_sqes+0x1f1/0x530 io_uring/io_uring.c:2112
 __do_sys_io_uring_enter io_uring/io_uring.c:3053 [inline]
 __se_sys_io_uring_enter+0x254/0xa50 io_uring/io_uring.c:2983
 __x64_sys_io_uring_enter+0x74/0x80 io_uring/io_uring.c:2983
 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+0x63/0xcd

read to 0xffff8881cb51d070 of 4 bytes by task 7030 on cpu 1:
 io_sqring_full io_uring/io_uring.h:213 [inline]
 io_uring_poll+0x8d/0x150 io_uring/io_uring.c:2494
 vfs_poll include/linux/poll.h:88 [inline]
 io_poll_check_events+0x183/0x360 io_uring/poll.c:233
 io_poll_task_func+0x1c/0x100 io_uring/poll.c:272
 handle_tw_list+0x12a/0x180 io_uring/io_uring.c:984
 tctx_task_work+0xbd/0x360 io_uring/io_uring.c:1037
 task_work_run+0x8e/0x110 kernel/task_work.c:177
 get_signal+0xeca/0x1020 kernel/signal.c:2634
 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:166
 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000035 -> 0x00000036

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7030 Comm: syz-executor.5 Not tainted 6.0.0-rc2-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
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