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In this noncompliant code example, a bitwise & operator operator is used with the results of an two equality-expressionexpressions:
| Code Block | ||||
|---|---|---|---|---|
| ||||
if (!(getuid() == 0 & geteuidgetgid() == 0)) { /* ... */ } |
Compliant Solution
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| Code Block | ||||
|---|---|---|---|---|
| ||||
if (!(getuid() == 0 && geteuidgetgid() == 0)) { /* ... */ } |
Risk Assessment
Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
EXP46-C | Low | Likely | Low | P9 | L2 |
Automated Detection
Tool | Version | Checker | Description | ||||
|---|---|---|---|---|---|---|---|
| Astrée |
|
| inappropriate-bool | Supported indirectly via MISRA C:2012 Rule 10.1 | ||||||||
| Axivion Bauhaus Suite |
| CertC-EXP46 | |||||||
| CodeSonar |
| LANG.TYPE.IOT | Inappropriate operand type | ||||||
| CONSTANT_EXPRESSION_RESULT | Partially implemented | |||||||
| Cppcheck |
|
| bitwiseOnBoolean | |||||||||
| Cppcheck Premium |
| bitwiseOnBoolean | |||||||
| Helix QAC |
| C3344, C4502 C++3709 | |||||||
| Klocwork |
| MISRA.LOGIC.OPERATOR.NOT_BOOL | |||||||
| LDRA tool suite |
| 136 S | Fully Implemented | ||||||
| Parasoft C/C++test |
|
CERT_C-EXP46-b | Expressions that are effectively Boolean should not be used as operands to operators other than (&&, ||, !, =, ==, !=, ?:) | ||||||||
| PC-lint Plus |
| 514 | Fully supported |
| Polyspace Bug Finder |
|
| CERT C: |
Operands shall not be of an inappropriate essential type
| Rule EXP46-C | Checks for bitwise operations on boolean operands (rule fully covered) | ||||||||
| PVS-Studio |
| V564, V1015 | |||||||
| RuleChecker |
| inappropriate-bool | Supported indirectly via MISRA C:2012 Rule 10.1 | ||||||
| Security Reviewer - Static Reviewer |
| C73 | Fully implemented |
Related Guidelines
Key here (explains table format and definitions)
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Intersection( EXP45-C, EXP46-C) = Ø
CWE-480 = Union( EXP46-C, list) where list =
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