Mergeback rc/1.24 -> master #3512
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Co-authored-by: Shati Patel <42641846+shati-patel@users.noreply.github.com>
CodeQL docs: remove information about metric queries
CodeQL docs migration: Delete `ql-spec` Sphinx project
This cleans up the test results, which were confusing because functions like `sink` had multiple locations. There are some additional results now involving casts to `const char *` because previously it varied whether `sink` used `const`, and now it always does.
CodeQL docs: remove stray GH variable
This test demonstrates that IR data flow conflates unrelated fields of a global struct-typed variable and that this bug is not present in the old AST-based implementation of `semmle.code.cpp.security.TaintTracking`.
The virtual-dispatch code for globals was missing any relationship between the union field access and the global variable, which meant it propagated function-pointer flow between any two fields of a global struct. This resulted in false positives from `cpp/tainted-format-string` on projects using SDL, such as WohlSoft/PGE-Project. In addition to fixing that bug, this commit also brings the code up to date with the new style of modeling flow through global variables: `DataFlow::Node.asVariable()`.
C++: Fix struct field conflation in IR data flow
shati-patel
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May 19, 2020
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Documentation changes look good ✔️
Conflicts: cpp/ql/test/library-tests/dataflow/DefaultTaintTracking/tainted.expected cpp/ql/test/library-tests/dataflow/DefaultTaintTracking/test_diff.expected
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A conflict appeared because #3511 was merged, so I merged from master into this PR to resolve it. |
shati-patel
approved these changes
May 19, 2020
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