From owner-svn-src-stable@freebsd.org Thu May 31 16:00:04 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6D9F2EFC7D7; Thu, 31 May 2018 16:00:04 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 1D7C66F51F; Thu, 31 May 2018 16:00:04 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id F2E731C4C9; Thu, 31 May 2018 16:00:03 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w4VG0305066088; Thu, 31 May 2018 16:00:03 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w4VG03xv066087; Thu, 31 May 2018 16:00:03 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201805311600.w4VG03xv066087@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Thu, 31 May 2018 16:00:03 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r334438 - stable/11/sys/netinet6 X-SVN-Group: stable-11 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/11/sys/netinet6 X-SVN-Commit-Revision: 334438 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 31 May 2018 16:00:04 -0000 Author: tuexen Date: Thu May 31 16:00:03 2018 New Revision: 334438 URL: https://svnweb.freebsd.org/changeset/base/334438 Log: MFC r333186: Send an ICMPv6 PacketTooBig message in case of forwading a packet which is too big for the outgoing interface and no firewall is involed. This problem was introduced in https://svnweb.freebsd.org/changeset/base/324996 Thanks to Irene Ruengeler for finding the bug and testing the fix. Approved by: re Modified: stable/11/sys/netinet6/ip6_fastfwd.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet6/ip6_fastfwd.c ============================================================================== --- stable/11/sys/netinet6/ip6_fastfwd.c Thu May 31 15:58:28 2018 (r334437) +++ stable/11/sys/netinet6/ip6_fastfwd.c Thu May 31 16:00:03 2018 (r334438) @@ -195,12 +195,19 @@ passin: in6_ifstat_inc(rcvif, ifs6_in_noroute); goto dropin; } + if (!PFIL_HOOKED(&V_inet6_pfil_hook)) { + if (m->m_pkthdr.len > nh.nh_mtu) { + in6_ifstat_inc(nh.nh_ifp, ifs6_in_toobig); + icmp6_error(m, ICMP6_PACKET_TOO_BIG, 0, nh.nh_mtu); + m = NULL; + goto dropout; + } + goto passout; + } /* * Outgoing packet firewall processing. */ - if (!PFIL_HOOKED(&V_inet6_pfil_hook)) - goto passout; if (pfil_run_hooks(&V_inet6_pfil_hook, &m, nh.nh_ifp, PFIL_OUT, PFIL_FWD, NULL) != 0 || m == NULL) goto dropout;