From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 12 Sep 2019 10:28:05 +0000 (-0700)
Subject: closes bpo-38127: _ctypes: PyObject_IsSubclass() should be checked for failure. ... 
X-Git-Tag: v3.8.0rc1~152
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=79cbaf50ac9530d507149402de5c84fa590d9cfb;p=thirdparty%2FPython%2Fcpython.git

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@gmail.com>
---

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;
         }