Issue #16447: Fix potential segfault when setting __name__ on a class.
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index bfb3552..07664ac 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -4136,6 +4136,20 @@
C.__name__ = 'D.E'
self.assertEqual((C.__module__, C.__name__), (mod, 'D.E'))
+ def test_evil_type_name(self):
+ # A badly placed Py_DECREF in type_set_name led to arbitrary code
+ # execution while the type structure was not in a sane state, and a
+ # possible segmentation fault as a result. See bug #16447.
+ class Nasty(str):
+ def __del__(self):
+ C.__name__ = "other"
+
+ class C(object):
+ pass
+
+ C.__name__ = Nasty("abc")
+ C.__name__ = "normal"
+
def test_subclass_right_op(self):
# Testing correct dispatch of subclass overloading __r<op>__...