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gh-110237: Check PyList_Append for errors in _PyEval_MatchClass (#110238)

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denballakh 2023-10-08 03:04:51 +03:00 committed by GitHub
parent de2a4036cb
commit dd9d781da3
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2 changed files with 12 additions and 3 deletions
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1
Misc/NEWS.d/next/Core and Builtins/2023-10-02-23-17-08.gh-issue-110237._Xub0z.rst Normal file
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@ -0,0 +1 @@
Fix missing error checks for calls to ``PyList_Append`` in ``_PyEval_MatchClass``.

14
Python/ceval.c
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@ -506,7 +506,9 @@ _PyEval_MatchClass(PyThreadState *tstate, PyObject *subject, PyObject *type,
}
if (match_self) {
// Easy. Copy the subject itself, and move on to kwargs.
PyList_Append(attrs, subject);
if (PyList_Append(attrs, subject) < 0) {
goto fail;
}
}
else {
for (Py_ssize_t i = 0; i < nargs; i++) {
@ -522,7 +524,10 @@ _PyEval_MatchClass(PyThreadState *tstate, PyObject *subject, PyObject *type,
if (attr == NULL) {
goto fail;
}
PyList_Append(attrs, attr);
if (PyList_Append(attrs, attr) < 0) {
Py_DECREF(attr);
goto fail;
}
Py_DECREF(attr);
}
}
@ -535,7 +540,10 @@ _PyEval_MatchClass(PyThreadState *tstate, PyObject *subject, PyObject *type,
if (attr == NULL) {
goto fail;
}
PyList_Append(attrs, attr);
if (PyList_Append(attrs, attr) < 0) {
Py_DECREF(attr);
goto fail;
}
Py_DECREF(attr);
}
Py_SETREF(attrs, PyList_AsTuple(attrs));