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gh-110237: Check `PyList_Append` for errors in `_PyEval_MatchClass` by denballakh · Pull Request #110238 · python/cpython · GitHub

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

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Merged
JelleZijlstra merged 3 commits into from
Oct 8, 2023
Conversation 17 Commits 3 Checks 0 Files changed
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gh-110237: Check PyList_Append for errors in _PyEval_MatchClass #110238

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600883f
Check `PyList_Append` for errors in `_PyEval_MatchClass`
denballakh Oct 2, 2023
794c5df
update news entry
denballakh Oct 2, 2023
57ff2b3
change `== -1` to `< 0`
denballakh Oct 2, 2023
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Check PyList_Append for errors in _PyEval_MatchClass
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denballakh committed Oct 2, 2023
commit 600883f645aa287f8d96900acef5459d58797811
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core and Builtins/2023-10-02-23-17-08.gh-issue-110237._Xub0z.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Check `PyList_Append` for errors in `_PyEval_MatchClass`
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14 changes: 11 additions & 3 deletions Python/ceval.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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) == -1) {
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JelleZijlstra marked this conversation as resolved.
Resolved
goto fail;
}
}
else {
for (Py_ssize_t i = 0; i < nargs; i++) {
Expand All @@ -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) == -1) {
Py_DECREF(attr);
goto fail;
}
Py_DECREF(attr);
}
}
Expand All @@ -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) == -1) {
Py_DECREF(attr);
goto fail;
}
Py_DECREF(attr);
}
Py_SETREF(attrs, PyList_AsTuple(attrs));
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