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| author | Antoine Pitrou <solipsis@pitrou.net> | 2010-01-17 12:26:20 (GMT) |
|---|---|---|
| committer | Antoine Pitrou <solipsis@pitrou.net> | 2010-01-17 12:26:20 (GMT) |
| commit | e80a6a4ead1da87d2a4149bfcbb95c1a3320dbc2 (patch) | |
| tree | 8fd4b9d3e430610e4fea82bbc2974bca013d0c6a /Include/bytearrayobject.h | |
| parent | aee900338e76c9d0879bf9470bc3be7912b11817 (diff) | |
| download | cpython-e80a6a4ead1da87d2a4149bfcbb95c1a3320dbc2.zip cpython-e80a6a4ead1da87d2a4149bfcbb95c1a3320dbc2.tar.gz cpython-e80a6a4ead1da87d2a4149bfcbb95c1a3320dbc2.tar.bz2 | |
Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`)
could crash in many places because of the PyByteArray_AS_STRING() macro
returning NULL. The macro now returns a statically allocated empty
string instead.
Diffstat (limited to 'Include/bytearrayobject.h')
| -rw-r--r-- | Include/bytearrayobject.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Include/bytearrayobject.h b/Include/bytearrayobject.h index 265b4bb..8702e5a 100644 --- a/Include/bytearrayobject.h +++ b/Include/bytearrayobject.h @@ -44,9 +44,13 @@ PyAPI_FUNC(char *) PyByteArray_AsString(PyObject *); PyAPI_FUNC(int) PyByteArray_Resize(PyObject *, Py_ssize_t); /* Macros, trading safety for speed */ -#define PyByteArray_AS_STRING(self) (assert(PyByteArray_Check(self)),((PyByteArrayObject *)(self))->ob_bytes) +#define PyByteArray_AS_STRING(self) \ + (assert(PyByteArray_Check(self)), \ + Py_SIZE(self) ? ((PyByteArrayObject *)(self))->ob_bytes : _PyByteArray_empty_string) #define PyByteArray_GET_SIZE(self) (assert(PyByteArray_Check(self)),Py_SIZE(self)) +extern char _PyByteArray_empty_string[]; + #ifdef __cplusplus } #endif |