From 3f15cf0961946702c87e09bc312b2bfec39654b6 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 9 Jul 2013 00:27:12 +0200
Subject: [PATCH] Issue #18408: Fix ConvParam() of the ctypes module to handle
 paramfunc failure (MemoryError).

---
 Modules/_ctypes/callproc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Modules/_ctypes/callproc.c b/Modules/_ctypes/callproc.c
index 701961150b..ead1c6f62a 100644
--- a/Modules/_ctypes/callproc.c
+++ b/Modules/_ctypes/callproc.c
@@ -620,6 +620,8 @@ static int ConvParam(PyObject *obj, Py_ssize_t index, struct argument *pa)
         assert(dict->paramfunc);
         /* If it has an stgdict, it is a CDataObject */
         carg = dict->paramfunc((CDataObject *)obj);
+        if (carg == NULL)
+            return -1;
         pa->ffi_type = carg->pffi_type;
         memcpy(&pa->value, &carg->value, sizeof(pa->value));
         pa->keep = (PyObject *)carg;
-- 
2.50.1