[Python-checkins] Correct overflow check in PyTuple_New() (GH-14838)

[T. Wouters]

https://github.com/python/cpython/commit/755d4ef8243050e5ff973524633caebd0ce03af9
commit: 755d4ef8243050e5ff973524633caebd0ce03af9
branch: master
author: Sergey Fedoseev <fedoseev.sergey at gmail.com>
committer: T. Wouters <thomas at python.org>
date: 2019-09-09T13:40:58-07:00
summary:

Correct overflow check in PyTuple_New() (GH-14838)

files:
M Objects/tupleobject.c

diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index a72257f95b08..08f7022fda25 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -120,8 +120,8 @@ tuple_alloc(Py_ssize_t size)
 #endif
     {
         /* Check for overflow */
-        if ((size_t)size > ((size_t)PY_SSIZE_T_MAX - sizeof(PyTupleObject) -
-                    sizeof(PyObject *)) / sizeof(PyObject *)) {
+        if ((size_t)size > ((size_t)PY_SSIZE_T_MAX - (sizeof(PyTupleObject) -
+                    sizeof(PyObject *))) / sizeof(PyObject *)) {
             return (PyTupleObject *)PyErr_NoMemory();
         }
         op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size);