[3.11] Fix refleak in super_descr_get (pythonGH-104408).

brandtbucher · brandtbucher · commit 7a1baf20fbc3 · 2023-05-11T23:43:43.000-07:00
(cherry picked from commit a781484) Co-authored-by: Brandt Bucher <brandtbucher@microsoft.com>
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
@@ -8969,8 +8969,10 @@ super_descr_get(PyObject *self, PyObject *obj, PyObject *type)
             return NULL;
         newobj = (superobject *)PySuper_Type.tp_new(&PySuper_Type,
                                                  NULL, NULL);
-        if (newobj == NULL)
+        if (newobj == NULL) {
+            Py_DECREF(obj_type);
             return NULL;
+        }
         Py_INCREF(su->type);
         Py_INCREF(obj);
         newobj->type = su->type;
