static double filter_filter(double t)
{
	/* f(t) = 2|t|^3 - 3|t|^2 + 1, -1 <= t <= 1 */
	if(t < 0.0) t = -t;
	if(t < 1.0) return((2.0 * t - 3.0) * t * t + 1.0);
	return(0.0);
}

This vulnerability category highlights issues in resource management where failures to properly release memory, file handles, or other resources can degrade system performance or enable denial-of-service conditions.