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Understanding Integer Overflow in C/C++

Appeared inProceedings of the 34th International Conference on Software Engineering (ICSE), Zurich, Switzerland, June Integer Overflow in C/C++ Will Dietz, Peng Li, John Regehr, and Vikram Adve Department of Computer ScienceUniversity of Illinois at School of ComputingUniversity of Integer overflow bugs in C and C++ programsare difficult to track down and may lead to fatal errors orexploitable vulnerabilities. Although a number of tools forfinding these bugs exist, the situation is complicated becausenot all overflows are bugs. Better tools need to be constructed but a thorough Understanding of the issues behind these errorsdoes not yet exist.

different purposes. Some uses for intentional overflows are well-known, such as hashing, cryptography, random number generation, and finding the largest representable value for a type. Others are less obvious, e.g., inexpensive floating point emulation, signed negation of INT_MIN, and even ordinary multiplication and addition. We present a ...

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