From owner-freebsd-bugs@FreeBSD.ORG Sun Jun 26 09:40:11 2011 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6937F106564A for ; Sun, 26 Jun 2011 09:40:02 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 5BC528FC14 for ; Sun, 26 Jun 2011 09:40:02 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p5Q9e2tQ035515 for ; Sun, 26 Jun 2011 09:40:02 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p5Q9e2mt035510; Sun, 26 Jun 2011 09:40:02 GMT (envelope-from gnats) Resent-Date: Sun, 26 Jun 2011 09:40:02 GMT Resent-Message-Id: <201106260940.p5Q9e2mt035510@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 [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 57143106566B for ; Sun, 26 Jun 2011 09:30:36 +0000 (UTC) (envelope-from marka@isc.org) Received: from mx.ams1.isc.org (mx.ams1.isc.org [IPv6:2001:500:60::65]) by mx1.freebsd.org (Postfix) with ESMTP id E3F018FC13 for ; Sun, 26 Jun 2011 09:30:35 +0000 (UTC) Received: from bikeshed.isc.org (bikeshed.isc.org [IPv6:2001:4f8:3:d::19]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "bikeshed.isc.org", Issuer "ISC CA" (verified OK)) by mx.ams1.isc.org (Postfix) with ESMTPS id B99765F9904 for ; Sun, 26 Jun 2011 09:30:24 +0000 (UTC) (envelope-from marka@isc.org) Received: from sex.dv.isc.org (sex.dv.isc.org [IPv6:2001:470:1f00:820:218:f3ff:feba:9a37]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by bikeshed.isc.org (Postfix) with ESMTPSA id 58255216C81 for ; Sun, 26 Jun 2011 09:30:17 +0000 (UTC) (envelope-from marka@isc.org) Received: from sex.dv.isc.org (localhost [127.0.0.1]) by sex.dv.isc.org (8.14.4/8.14.4) with ESMTP id p5Q9RgRs010158 for ; Sun, 26 Jun 2011 19:27:42 +1000 (EST) (envelope-from marka@sex.dv.isc.org) Received: (from marka@localhost) by sex.dv.isc.org (8.14.4/8.14.4/Submit) id p5Q9RfOw010157; Sun, 26 Jun 2011 19:27:41 +1000 (EST) (envelope-from marka) Message-Id: <201106260927.p5Q9RfOw010157@sex.dv.isc.org> Date: Sun, 26 Jun 2011 19:27:41 +1000 (EST) From: Mark Andrews To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: kern/158307: ipv6_pktinfo breaks IPV6_USE_MIN_MTU X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Mark Andrews List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jun 2011 09:40:11 -0000 >Number: 158307 >Category: kern >Synopsis: ipv6_pktinfo breaks IPV6_USE_MIN_MTU >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Jun 26 09:40:01 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Mark Andrews >Release: FreeBSD 8.2-STABLE i386 >Organization: ISC >Environment: System: FreeBSD sex.dv.isc.org 8.2-STABLE FreeBSD 8.2-STABLE #10: Sat Feb 26 18:02:12 EST 2011 marka@sex.dv.isc.org:/usr/obj/usr/src/sys/DEBUG i386 >Description: If IPV6_PKTINFO is set as a control with sendmsg() then IPV6_USE_MIN_MTU state set by setsockopt() is ignored. >How-To-Repeat: Run named and look at any IPv6 UDP response > 1280 bytes. These are all supposed to be fragmented at 1280 as named sets IPV6_USE_MIN_MTU to 1 on all IPv6 UDP sockets. PMTUD really doesn't work well for DNS which is one of the reasons why IPV6_USE_MIN_MTU was defined in the first place. >Fix: >Release-Note: >Audit-Trail: >Unformatted: