From owner-freebsd-bugs@FreeBSD.ORG Fri Aug 13 09:40:24 2004 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1D74F16A4CF for ; Fri, 13 Aug 2004 09:40:24 +0000 (GMT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id E170A43D5C for ; Fri, 13 Aug 2004 09:40:23 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.11/8.12.11) with ESMTP id i7D9eN84070870 for ; Fri, 13 Aug 2004 09:40:23 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.11/8.12.11/Submit) id i7D9eNMg070869; Fri, 13 Aug 2004 09:40:23 GMT (envelope-from gnats) Resent-Date: Fri, 13 Aug 2004 09:40:23 GMT Resent-Message-Id: <200408130940.i7D9eNMg070869@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Mark Andrews Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E9D9F16A4CE for ; Fri, 13 Aug 2004 09:31:21 +0000 (GMT) Received: from www.freebsd.org (www.freebsd.org [216.136.204.117]) by mx1.FreeBSD.org (Postfix) with ESMTP id DD50843D2D for ; Fri, 13 Aug 2004 09:31:21 +0000 (GMT) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.12.11/8.12.11) with ESMTP id i7D9VLPd012187 for ; Fri, 13 Aug 2004 09:31:21 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.12.11/8.12.11/Submit) id i7D9VLtG012186; Fri, 13 Aug 2004 09:31:21 GMT (envelope-from nobody) Message-Id: <200408130931.i7D9VLtG012186@www.freebsd.org> Date: Fri, 13 Aug 2004 09:31:21 GMT From: Mark Andrews To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-2.3 Subject: kern/70399: ipfilter breaks IPv6 path mtu discovery X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Aug 2004 09:40:24 -0000 >Number: 70399 >Category: kern >Synopsis: ipfilter breaks IPv6 path mtu discovery >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Aug 13 09:40:23 GMT 2004 >Closed-Date: >Last-Modified: >Originator: Mark Andrews >Release: 4.10 stable >Organization: ISC >Environment: FreeBSD bsdi.dv.isc.org 4.10-STABLE FreeBSD 4.10-STABLE #11: Fri Aug 13 15:27:12 EST 2004 marka@bsdi.dv.isc.org:/usr/obj/usr/src/sys/BSDI i386 >Description: icmp6_error() prepends a mbuf to send ICMP6_PACKET_TOO_BIG. When ipfilter is active there is a attempt to pullup the full packet which fails because there is not a associated cluster. ICMP6_TIME_EXCEEDED can also demonstate the problem if traceroute6 uses a size of 105 or greater. >How-To-Repeat: have a inbound interface w/ a mtu of 1500 and a output interface with a mtu of 1280 (e.g. gif). Have ipf active. Attempt to send a packet > 1280 octets through the router. The ICMP6_PACKET_TOO_BIG packet is dropped before it is emitted. >Fix: >Release-Note: >Audit-Trail: >Unformatted: