C++: Add use-after-free FP tests#19397
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jketema merged 1 commit intogithub:mainfrom Apr 29, 2025
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Pull Request Overview
This pull request adds tests for known false positives related to use-after-free issues in C++ code.
- Removed an unused pointer variable in test9.
- Introduced new structures and a function (malloc_after_free) to simulate use-after-free scenarios consistent with reported false positives.
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- cpp/ql/test/query-tests/Security/CWE/CWE-416/semmle/tests/UseAfterFree/UseAfterFree.expected: Language not supported
| return; | ||
| } | ||
| use(s->i1.data); // GOOD [FALSE POSITIVE] | ||
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s->i2 is dereferenced without a prior check for null, which could lead to a segmentation fault if s->i2 is not properly initialized. Consider adding a null check for s->i2 before dereferencing.
Suggested change
| if (s->i2 == NULL) { | |
| return; | |
| } |
redsun82
approved these changes
Apr 29, 2025
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These derive from #19387. Note that these FPs are a known issue.