Using the value of a pointer to a FILE object after the associated file is closed is undefined behavior. (see See undefined behavior 148153.) . Programs that close the standard streams (especially stdout but also stderr and stdin) must be careful not to use these streams in subsequent function calls, particularly those that implicitly operate on them (such as printf(), perror(), and getc()).
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Using the value of a pointer to a FILE object after the associated file is closed is undefined behavior.
Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
FIO46-C | Medium | Unlikely | Medium | P4 | L3 |
Automated Detection
Tool | Version | Checker | Description | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Astrée |
| Supported | |||||||
| CodeSonar |
| IO.UAC | Use after close | ||||||
| Compass/ROSE |
5.0
| Coverity |
| USE_AFTER_FREE | Implemented | ||||||
| Helix QAC |
| DF2696, DF2697, DF2698 | |||||||
| Klocwork |
|
RH.LEAK
SV.INCORRECT_RESOURCE_HANDLING.URH | |||||||
| LDRA tool suite |
|
48 D | Partially implemented |
| Parasoft C/C++test |
| CERT_C-FIO46-a | Do not use resources that have been freed | ||||||
| PC-lint Plus |
| 2471 | Fully supported | ||||||
| Polyspace Bug Finder |
| Checks for use of previously closed resource (rule partially covered) | |||||||
| SonarQube C/C++ Plugin |
| S3588 |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
Bibliography
| [IEEE Std 1003.1:2013] | XSH, System Interfaces, open |
| [ISO/IEC 9899: |
| 2024] | Subclause 7. |
23.3, "Files" |
23.5.1, "The |
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