From owner-svn-src-stable-8@FreeBSD.ORG Tue Oct 4 13:31:57 2011 Return-Path: Delivered-To: svn-src-stable-8@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" 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-stable-8@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for only the 8-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-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); }