From: Thomas Graf <tgraf@suug.ch>
Date: Thu, 28 Oct 2010 22:17:07 +0000 (+0200)
Subject: Fix use of uninitialized data at the end of netlink message
X-Git-Tag: libnl3_0~83
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1eacd6b16b014eb42bcf6683ebe2334c3a35c68;p=thirdparty%2Flibnl.git

Fix use of uninitialized data at the end of netlink message

The netlink message buffer is preallocated to a page and later
expanded as needed. Everything was properly paded and zeroed
out except for the unused part at the end. Use calloc() to
allocate the buffer.
---

diff --git a/lib/msg.c b/lib/msg.c
index 9fe9d54..6a8e14a 100644
--- a/lib/msg.c
+++ b/lib/msg.c
@@ -374,7 +374,7 @@ static struct nl_msg *__nlmsg_alloc(size_t len)
 
 	nm->nm_refcnt = 1;
 
-	nm->nm_nlh = malloc(len);
+	nm->nm_nlh = calloc(1, len);
 	if (!nm->nm_nlh)
 		goto errout;