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[3.12] gh-110237: Check PyList_Append for errors in _PyEval_MatchClass (GH-110238) (#110511)

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gh-110237: Check `PyList_Append` for errors in `_PyEval_MatchClass` (GH-110238)
(cherry picked from commit dd9d781da3)

Co-authored-by: denballakh <47365157+denballakh@users.noreply.github.com>
This commit is contained in:
Miss Islington (bot) 2023-10-07 17:40:38 -07:00 • committed by GitHub
parent 96e42d2f8d
commit ef4bd1b57f
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2 changed files with 12 additions and 3 deletions
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14
Python/ceval.c
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@ -489,7 +489,9 @@ match_class(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++) {
@ -505,7 +507,10 @@ match_class(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);
}
}
@ -518,7 +523,10 @@ match_class(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));