syzbot

==================================================================
BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

write to 0xffff88812f87b070 of 4 bytes by task 14029 on cpu 0:
 io_get_sqe fs/io_uring.c:7274 [inline]
 io_submit_sqes+0x1eb/0x670 fs/io_uring.c:7318
 __do_sys_io_uring_enter fs/io_uring.c:10039 [inline]
 __se_sys_io_uring_enter+0x212/0xb00 fs/io_uring.c:9981
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:9981
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88812f87b070 of 4 bytes by task 13998 on cpu 1:
 io_sqring_full fs/io_uring.c:1635 [inline]
 io_uring_poll+0x8e/0x146 fs/io_uring.c:9362
 vfs_poll include/linux/poll.h:90 [inline]
 __io_arm_poll_handler+0x1a8/0x780 fs/io_uring.c:5577
 io_arm_poll_handler+0x25e/0x3d0 fs/io_uring.c:5643
 io_queue_sqe_arm_apoll fs/io_uring.c:6951 [inline]
 __io_queue_sqe+0x16b/0x440 fs/io_uring.c:6989
 io_queue_sqe fs/io_uring.c:7016 [inline]
 io_submit_sqe+0x77a/0x47d3 fs/io_uring.c:7219
 io_submit_sqes+0x25d/0x670 fs/io_uring.c:7325
 __do_sys_io_uring_enter fs/io_uring.c:10039 [inline]
 __se_sys_io_uring_enter+0x212/0xb00 fs/io_uring.c:9981
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:9981
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000341 -> 0x0000034d

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13998 Comm: syz-executor.5 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================