From: Xiang Zhang <angwerzx@126.com>
Date: Mon, 20 Feb 2017 06:32:53 +0000 (+0800)
Subject: bpo-29347: Fix possibly dereferencing undefined pointers when creating weakref object... 
X-Git-Tag: v2.7.14rc1~269
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7131a73f9655cfd325c798385905326f57b94640;p=python

bpo-29347: Fix possibly dereferencing undefined pointers when creating weakref objects (#128) (#187)
---

diff --git a/Misc/NEWS b/Misc/NEWS
index f0ba8c6213..8726996a4b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@ What's New in Python 2.7.14?
 Core and Builtins
 -----------------
 
+- bpo-29347: Fixed possibly dereferencing undefined pointers
+  when creating weakref objects.
+
 - Issue #14376: Allow sys.exit to accept longs as well as ints. Patch
   by Gareth Rees.
 
diff --git a/Objects/weakrefobject.c b/Objects/weakrefobject.c
index c8b982fcd5..2eb4fe0b17 100644
--- a/Objects/weakrefobject.c
+++ b/Objects/weakrefobject.c
@@ -24,6 +24,8 @@ init_weakref(PyWeakReference *self, PyObject *ob, PyObject *callback)
 {
     self->hash = -1;
     self->wr_object = ob;
+    self->wr_prev = NULL;
+    self->wr_next = NULL;
     Py_XINCREF(callback);
     self->wr_callback = callback;
 }