io_uring/region: return negative -E2BIG in io_create_region()

JIRA: https://issues.redhat.com/browse/RHEL-106845

commit 2ae6bdb
Author: Dan Carpenter <dan.carpenter@linaro.org>
Date:   Wed Nov 20 12:15:05 2024 +0300

    io_uring/region: return negative -E2BIG in io_create_region()

    This code accidentally returns positivie E2BIG instead of negative
    -E2BIG.  The callers treat negatives and positives the same so this
    doesn't affect the kernel.  The error code is returned to userspace via
    the system call.

    Fixes: dfbbfbf ("io_uring: introduce concept of memory regions")
    Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
    Link: https://lore.kernel.org/r/d8ea3bef-74d8-4f77-8223-6d36464dd4dc@stanley.mountain
    Signed-off-by: Jens Axboe <axboe@kernel.dk>

Signed-off-by: Ming Lei <ming.lei@redhat.com>

Author: Ming Lei

io_uring/memmap.c

@@ -229,7 +229,7 @@ int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr,
 	if (!reg->size || reg->mmap_offset || reg->id)
 		return -EINVAL;
 	if ((reg->size >> PAGE_SHIFT) > INT_MAX)
-		return E2BIG;
+		return -E2BIG;
 	if ((reg->user_addr | reg->size) & ~PAGE_MASK)
 		return -EINVAL;
 	if (check_add_overflow(reg->user_addr, reg->size, &end))