From owner-freebsd-net@FreeBSD.ORG Thu Oct 18 21:41:17 2012 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id ABF11DFA for ; Thu, 18 Oct 2012 21:41:17 +0000 (UTC) (envelope-from david@catwhisker.org) Received: from albert.catwhisker.org (m209-73.dsl.rawbw.com [198.144.209.73]) by mx1.freebsd.org (Postfix) with ESMTP id 640678FC17 for ; Thu, 18 Oct 2012 21:41:17 +0000 (UTC) Received: from albert.catwhisker.org (localhost [127.0.0.1]) by albert.catwhisker.org (8.14.5/8.14.5) with ESMTP id q9ILfB65018156 for ; Thu, 18 Oct 2012 14:41:11 -0700 (PDT) (envelope-from david@albert.catwhisker.org) Received: (from david@localhost) by albert.catwhisker.org (8.14.5/8.14.5/Submit) id q9ILfBgB018155 for net@freebsd.org; Thu, 18 Oct 2012 14:41:11 -0700 (PDT) (envelope-from david) Date: Thu, 18 Oct 2012 14:41:10 -0700 From: David Wolfskill To: net@freebsd.org Subject: Seeing "rn_addmask: mask impossibly already in tree" on console Message-ID: <20121018214110.GE1817@albert.catwhisker.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="gRZ38brEgCoUohoa" Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: net@freebsd.org, David Wolfskill List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Oct 2012 21:41:17 -0000 --gRZ38brEgCoUohoa Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Running: FreeBSD g1-227.catwhisker.org 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #273 24= 1679M: Thu Oct 18 04:52:24 PDT 2012 root@g1-227.catwhisker.org:/usr/obj= /usr/src/sys/CANARY i386 on my laptop, at times when I switch from X to vty0, I see (e.g.): Oct 18 08:27:07 g1-227 kernel: rn_addmask: mask impossibly already in treer= n_addmask: mask impossibly already in treern_addmask: mask impossibly alrea= dy in treern_addmask: mask impossibly already in treern_addmask: mask impos= sibly already in treern_addmask: mask impossibly already in treern_addmask:= mask impossibly already in tree... I see where the message is issued (sys/net/radix.c:539 @r210122, last updated 2010-07-15 14:41:59Z). As this is a laptop, and thus subject to being connected to networks I do not control, I run a packet filter on it, and the one with which I happen to be most familair is ipfw. Thus that's what I use. So it's possible that either ipfw or routing is driving rn_addmask(). However, I'm unclear on: * What (specifically) is actually causing this. * Whether or not it's enough of an issue or problem that I should take evasive action. Put differently: what is my exposure here? * If so, what sort of evasive action is appropriate for me to take. I suppose I could try a packet-capture, but the lack of timestamps make correlating the message-issuance with particular packets a little more challenging than I'd prefer. I note, too, that I'm running a very similar ipfw configuration on the packet-filter machine here at home; while I find the above- quoted whines in /var/log/console.log on the laptop, I do not find them mentioned in that file for the packet filter machine. Clues? [Please include me in the recipient list, as I'm not subscribed to net@; I've set Reply-To as a hint.] Thanks! Peace, david --=20 David H. Wolfskill david@catwhisker.org Taliban: Evil men with guns afraid of truth from a 14-year old girl. See http://www.catwhisker.org/~david/publickey.gpg for my public key. --gRZ38brEgCoUohoa Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlCAd3UACgkQmprOCmdXAD1x+wCfTfmvzlGbIzPcoS7pv4HhdvJC VecAn1FFqYD2W2Zkjb9rjwNxNfqg8wOE =DPnx -----END PGP SIGNATURE----- --gRZ38brEgCoUohoa--