From owner-freebsd-stable@FreeBSD.ORG Wed Jan 10 07:26:01 2007 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 9541F16A4B3 for ; Wed, 10 Jan 2007 07:26:01 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.freebsd.org (Postfix) with ESMTP id 802CE13C448 for ; Wed, 10 Jan 2007 07:26:01 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id 62EF51A3C1A; Tue, 9 Jan 2007 23:26:01 -0800 (PST) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 8843B51369; Wed, 10 Jan 2007 02:26:00 -0500 (EST) Date: Wed, 10 Jan 2007 02:26:00 -0500 From: Kris Kennaway To: Krzysztof Kowalik Message-ID: <20070110072600.GA32505@xor.obsecurity.org> References: <20070107155229.GA4749@uci.agh.edu.pl> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Dxnq1zWXvFF0Q93v" Content-Disposition: inline In-Reply-To: <20070107155229.GA4749@uci.agh.edu.pl> User-Agent: Mutt/1.4.2.2i Cc: freebsd-stable@freebsd.org Subject: Re: fxp(4) and lockups on RELENG_6_x X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jan 2007 07:26:01 -0000 --Dxnq1zWXvFF0Q93v Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Jan 07, 2007 at 04:52:29PM +0100, Krzysztof Kowalik wrote: > Hello. >=20 > We are running an (IRC) server that under high-rate traffic (ie. DDoS > attack) stops to respond to the network. The network remains locked up > even after the original attack stops. However running tcpdump (which > switches the interface into promisc mode) unlocks networking and things > work again. >=20 > At the moment, we are running 6.2-RC1 cvsupped at Dec 10, with if_fxp.c > from Nov 11 (previously, we had 6.1 for a while, having the same issues) >=20 > if_fxp.c,v 1.240.2.10.2.1 2006/11/20 16:21:12 >=20 > The same machine used to run FreeBSD 4.11 without any problems. >=20 > Any help/pointers/suggestions would be appreciated. You'll probably need to set up DDB and run the usual tracing commands (see the developers handbook) to obtain further debugging information to proceed here. Kris --Dxnq1zWXvFF0Q93v Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFFpJUHWry0BWjoQKURAuo3AKCLlUG/UpHyyoi8tSj7LImdL1kxAACg9EC+ ctEu7rxgsyMfVsMtY2FSSnc= =LHYm -----END PGP SIGNATURE----- --Dxnq1zWXvFF0Q93v--