$OpenBSD: patch-Objects_tupleobject_c,v 1.1 2008/08/06 03:23:31 djm Exp $
--- Objects/tupleobject.c.orig	Sun Aug 13 03:03:09 2006
+++ Objects/tupleobject.c	Tue Aug  5 18:18:52 2008
@@ -60,11 +60,12 @@ PyTuple_New(register Py_ssize_t size)
 		Py_ssize_t nbytes = size * sizeof(PyObject *);
 		/* Check for overflow */
 		if (nbytes / sizeof(PyObject *) != (size_t)size ||
-		    (nbytes += sizeof(PyTupleObject) - sizeof(PyObject *))
-		    <= 0)
+		    (nbytes > PY_SSIZE_T_MAX - sizeof(PyTupleObject) - sizeof(PyObject *)))
 		{
 			return PyErr_NoMemory();
 		}
+		nbytes += sizeof(PyTupleObject) - sizeof(PyObject *);
+
 		op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size);
 		if (op == NULL)
 			return NULL;