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gh-126108: Fix potential null pointer dereference in PySys_AddWarnOptionUnicode (#126118)

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Valery Fedorenko 2025-01-31 22:36:30 +08:00 • committed by GitHub
parent 7eaef74561
commit fad36bf382
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2 changed files with 5 additions and 3 deletions
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1
Misc/NEWS.d/next/Security/2024-10-29-09-15-10.gh-issue-126108.eTIjHY.rst Normal file
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@ -0,0 +1 @@
Fix a possible ``NULL`` pointer dereference in :c:func:`!PySys_AddWarnOptionUnicode`.

7
Python/sysmodule.c
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@ -2847,6 +2847,7 @@ PySys_ResetWarnOptions(void)
static int
_PySys_AddWarnOptionWithError(PyThreadState *tstate, PyObject *option)
{
assert(tstate != NULL);
PyObject *warnoptions = get_warnoptions(tstate);
if (warnoptions == NULL) {
return -1;
@ -2862,11 +2863,11 @@ PyAPI_FUNC(void)
PySys_AddWarnOptionUnicode(PyObject *option)
{
PyThreadState *tstate = _PyThreadState_GET();
_Py_EnsureTstateNotNULL(tstate);
assert(!_PyErr_Occurred(tstate));
if (_PySys_AddWarnOptionWithError(tstate, option) < 0) {
/* No return value, therefore clear error state if possible */
if (tstate) {
_PyErr_Clear(tstate);
}
_PyErr_Clear(tstate);
}
}