[Python-checkins] closes bpo-38127: _ctypes: PyObject_IsSubclass() should be checked for failure. (GH-16011)

Miss Islington (bot) webhook-mailer at python.org
Thu Sep 12 06:28:09 EDT 2019


https://github.com/python/cpython/commit/79cbaf50ac9530d507149402de5c84fa590d9cfb
commit: 79cbaf50ac9530d507149402de5c84fa590d9cfb
branch: 3.8
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2019-09-12T03:28:05-07:00
summary:

closes bpo-38127: _ctypes: PyObject_IsSubclass() should be checked for failure. (GH-16011)


An exception may occur during a PyObject_IsSubclass() call.
(cherry picked from commit ea683deccc505a78bbbb1eb8c6a88b0835ad5151)

Co-authored-by: Zackery Spytz <zspytz at gmail.com>

files:
M Modules/_ctypes/_ctypes.c

diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index 47288740063e..0f11e01e1110 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -1168,7 +1168,11 @@ PyCPointerType_from_param(PyObject *type, PyObject *value)
         */
         StgDictObject *v = PyObject_stgdict(value);
         assert(v); /* Cannot be NULL for pointer or array objects */
-        if (PyObject_IsSubclass(v->proto, typedict->proto)) {
+        int ret = PyObject_IsSubclass(v->proto, typedict->proto);
+        if (ret < 0) {
+            return NULL;
+        }
+        if (ret) {
             Py_INCREF(value);
             return value;
         }



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