Division and remainder operations performed on integers are susceptible to divide-by-zero errors. Consequently, the divisor in a division or remainder operation on integer types must be checked for zero prior to the operation. Division and remainder operations performed on floating-point numbers are not subject to this rule.
Noncompliant Code Example (Division)
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A division or remainder by zero can result in abnormal program termination and denial-of-service (DoS).
Rule | Severity | Likelihood | Detectable |
|---|
Repairable | Priority | Level |
|---|---|---|
NUM02-J | Low | Likely |
No | Yes | P6 | L2 |
Automated Detection
Tool | Version | Checker | Description | ||||
|---|---|---|---|---|---|---|---|
| Coverity | 7.5 | DIVIDE_BY_ZERO | Implemented | ||||
| Parasoft Jtest |
|
| CERT. |
| NUM02.ZERO |
| Avoid division by zero | |||||||||
| PVS-Studio |
| V6020 | |||||||
| SonarQube |
| S3518 | Zero should not be a possible denominator |
Related Guidelines
INT33-C. Ensure that division and remainder operations do not result in divide-by-zero errors | |
CWE-369, Divide by Zero |
Bibliography
Subclause 6.5.5, "Multiplicative Operators" | |
Chapter 5, "Integers" | |
| [Seacord 2015] | |
Chapter 2, "Basics" |
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