When a stride is given, validate it against the box width, not the
bo width.
This mirrors what check_iov_bounds does.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: David Riley <davidriley@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Acked-by: Gurchetan Singh <gurchetansingh@chromium.org>