From: Austin Clements <amdragon@MIT.EDU>
To: notmuch@notmuchmail.org
Subject: [PATCH 1/3] lib: Don't delete uninitialized pointers
Date: Sun, 29 Jan 2012 00:50:08 -0500
Message-Id: <1327816210-29124-1-git-send-email-amdragon@mit.edu>
Precedence: list

In the error-handling paths of notmuch_database_open, we call
notmuch_database_close, which "delete"s several objects referenced by
the notmuch_database_t object.  However, some of these pointers may be
uninitialized, resulting in undefined behavior.  Hence, allocate the
notmuch_database_t with talloc_zero to make sure these pointers are
NULL so that "delete"ing them is harmless.
---
 lib/database.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/database.cc b/lib/database.cc
index 8103bd9..a6d15a1 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -617,7 +617,7 @@ notmuch_database_open (const char *path,
 	initialized = 1;
     }
 
-    notmuch = talloc (NULL, notmuch_database_t);
+    notmuch = talloc_zero (NULL, notmuch_database_t);
     notmuch->exception_reported = FALSE;
     notmuch->path = talloc_strdup (notmuch, path);
 
-- 
1.7.7.3