[DAFFODIL-2411] Investigate potential Integer overflows

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0
• Component/s: Back End
• Assignee: Unassigned
• Reporter: Josh Adams
• Created: 14/Oct/20 18:37
• Updated: 18/Mar/21 19:47

Description

There are a number of places where we are getting a length of an element or an array that could potentially cause an integer overflow to occur.

For example, all the binary number parsers have a getBitLength funciton that returns an int. It is unlikely for a binary number to have such a large length that it overflows, but if there were bad data or a bad dfdl:length expression, it could definately happen.

Currently there are calls in many different places that would need range checks to prevent this, so it may require some re-architecture to provide a clean solution.