check_object_size
check_object_size(to, n, false);
check_object_size(to, n, false);
check_object_size(from, n, true);
check_object_size(from, n, true);
check_object_size(addr, bytes, is_source);
check_object_size(dst, count, false);
check_object_size(data, cmlen - sizeof(*cm), true);