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BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

read-write to 0xffff88814a7f7070 of 4 bytes by task 11537 on cpu 0:
 io_get_sqe fs/io_uring.c:9023 [inline]
 io_submit_sqes+0x1f2/0x500 fs/io_uring.c:9069
 __do_sys_io_uring_enter fs/io_uring.c:12008 [inline]
 __se_sys_io_uring_enter+0x2d9/0xdd0 fs/io_uring.c:11934
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:11934
 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 0xffff88814a7f7070 of 4 bytes by task 11507 on cpu 1:
 io_sqring_full fs/io_uring.c:2128 [inline]
 io_uring_poll+0x8d/0x150 fs/io_uring.c:11173
 vfs_poll include/linux/poll.h:88 [inline]
 io_poll_check_events+0x20e/0x520 fs/io_uring.c:6912
 io_poll_task_func+0x2e/0x270 fs/io_uring.c:6960
 handle_tw_list fs/io_uring.c:2938 [inline]
 tctx_task_work+0x8bc/0xc00 fs/io_uring.c:2967
 task_work_run+0x8e/0x110 kernel/task_work.c:177
 get_signal+0xeca/0x1020 kernel/signal.c:2652
 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+0x46/0xb0

value changed: 0x0000283a -> 0x00002842

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11507 Comm: syz-executor.1 Not tainted 5.18.0-syzkaller-11338-g2c5ca23f7414-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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