syzbot

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BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

read-write to 0xffff88813fd14870 of 4 bytes by task 8376 on cpu 0:
 io_get_sqe io_uring/io_uring.c:2395 [inline]
 io_submit_sqes+0x249/0xfe0 io_uring/io_uring.c:2441
 __do_sys_io_uring_enter io_uring/io_uring.c:3458 [inline]
 __se_sys_io_uring_enter+0x1e5/0x1b70 io_uring/io_uring.c:3392
 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3392
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813fd14870 of 4 bytes by task 8363 on cpu 1:
 io_sqring_full io_uring/io_uring.h:259 [inline]
 io_uring_poll+0xcd/0x1a0 io_uring/io_uring.c:2891
 vfs_poll include/linux/poll.h:88 [inline]
 do_select+0x94e/0xf90 fs/select.c:538
 core_sys_select+0x361/0x520 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6 fs/select.c:804 [inline]
 __se_sys_pselect6+0x220/0x290 fs/select.c:795
 __x64_sys_pselect6+0x78/0x90 fs/select.c:795
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x000001f5 -> 0x00000216

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8363 Comm: syz-executor.2 Not tainted 6.3.0-syzkaller-00113-g1a0beef98b58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
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