static size_t smbXcli_iov_len(const struct iovec *iov, int count)
{
	ssize_t ret = iov_buflen(iov, count);

	/* Ignore the overflow case for now ... */
	return ret;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.