From owner-svn-src-all@FreeBSD.ORG  Tue Oct  4 13:31:57 2011
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A94E21065674;
	Tue,  4 Oct 2011 13:31:57 +0000 (UTC) (envelope-from bz@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 987AE8FC12;
	Tue,  4 Oct 2011 13:31:57 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id p94DVvdG059767;
	Tue, 4 Oct 2011 13:31:57 GMT (envelope-from bz@svn.freebsd.org)
Received: (from bz@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id p94DVv9F059765;
	Tue, 4 Oct 2011 13:31:57 GMT (envelope-from bz@svn.freebsd.org)
Message-Id: <201110041331.p94DVv9F059765@svn.freebsd.org>
From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Tue, 4 Oct 2011 13:31:57 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org
X-SVN-Group: stable-8
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r225978 - stable/8/sys/netinet6
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 04 Oct 2011 13:31:57 -0000

Author: bz
Date: Tue Oct  4 13:31:57 2011
New Revision: 225978
URL: http://svn.freebsd.org/changeset/base/225978

Log:
  MFC r225885:
  
   Fix an obvious bug from r186196 shadowing a variable, not correctly
   appending the new mbuf to the chain reference but possibly causing an mbuf
   nextpkt loop leading to a memory used after handoff (or having been freed)
   and leaking an mbuf here.
  
   Reviewed by:	rwatson, brooks

Modified:
  stable/8/sys/netinet6/nd6.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)

Modified: stable/8/sys/netinet6/nd6.c
==============================================================================
--- stable/8/sys/netinet6/nd6.c	Tue Oct  4 13:24:22 2011	(r225977)
+++ stable/8/sys/netinet6/nd6.c	Tue Oct  4 13:31:57 2011	(r225978)
@@ -1917,14 +1917,15 @@ nd6_output_lle(struct ifnet *ifp, struct
 		if (*chain == NULL)
 			*chain = m;
 		else {
-			struct mbuf *m = *chain;
+			struct mbuf *mb;
 
 			/*
 			 * append mbuf to end of deferred chain
 			 */
-			while (m->m_nextpkt != NULL)
-				m = m->m_nextpkt;
-			m->m_nextpkt = m;
+			mb = *chain;
+			while (mb->m_nextpkt != NULL)
+				mb = mb->m_nextpkt;
+			mb->m_nextpkt = m;
 		}
 		return (error);
 	}