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| author | David Benjamin <davidben@google.com> | 2024-08-13 18:26:40 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-08-13 15:26:40 -0700 |
| commit | bde4ffe7521421cfa891c7d6e526566920326b3f (patch) | |
| tree | 76bfd65d83d638065ed4758a11da960ff482d865 /lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPlatformPythonInterface | |
| parent | 2596464dcd7563cb4f54ef794334fa87438cc324 (diff) | |
Don't pass null pointers to memcmp and memcpy in libFuzzer (#96775)
In C, it is UB to call `memcmp(NULL, NULL, 0)`, `memcpy(NULL, NULL, 0)`,
etc. Unfortunately, `(NULL, 0)` is the natural representation of an
empty sequence of objects and extremely common in real world code. As a
result, all C code, and C++ code which calls into C functions, must
carefully guard all calls to `memcpy`.
This is a serious, real world usability issue in C and should be fixed
in the language (see #49459). In the meantime, pay the cost of the extra
branch to avoid tripping UBSan in libFuzzer. Once the usability problem
in C has been fixed, these checks can be removed.
Fixes #96772
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPlatformPythonInterface')
0 files changed, 0 insertions, 0 deletions