cpw(char *dst, char *src, int len)
{
	char	   *ptr = src;

	while (ptr - src < len)
	{
		if (*ptr == '"' || *ptr == '\\')
			*dst++ = '\\';
		*dst++ = *ptr++;
	}
	return dst;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.