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BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

read-write to 0xffff888155021070 of 4 bytes by task 17352 on cpu 1:
 io_get_sqe io_uring/io_uring.c:2229 [inline]
 io_submit_sqes+0x1f1/0x530 io_uring/io_uring.c:2275
 __do_sys_io_uring_enter io_uring/io_uring.c:3222 [inline]
 __se_sys_io_uring_enter+0x1ef/0xc60 io_uring/io_uring.c:3154
 __x64_sys_io_uring_enter+0x74/0x80 io_uring/io_uring.c:3154
 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 0xffff888155021070 of 4 bytes by task 17327 on cpu 0:
 io_sqring_full io_uring/io_uring.h:228 [inline]
 io_uring_poll+0x8e/0x1a0 io_uring/io_uring.c:2659
 vfs_poll include/linux/poll.h:88 [inline]
 io_poll_check_events+0x20e/0x440 io_uring/poll.c:276
 io_poll_task_func+0x1c/0x100 io_uring/poll.c:321
 handle_tw_list+0x12a/0x180 io_uring/io_uring.c:1042
 tctx_task_work+0x72/0x360 io_uring/io_uring.c:1089
 task_work_run+0xde/0x110 kernel/task_work.c:179
 get_signal+0xaf5/0xc60 kernel/signal.c:2635
 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:168
 exit_to_user_mode_prepare kernel/entry/common.c:203 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:296
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00005127 -> 0x00005155

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 17327 Comm: syz-executor.5 Not tainted 6.1.0-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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