From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263130AbVHEVzD (ORCPT ); Fri, 5 Aug 2005 17:55:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261912AbVHEVxR (ORCPT ); Fri, 5 Aug 2005 17:53:17 -0400 Received: from neveragain.de ([217.69.76.1]:33742 "EHLO hobbit.neveragain.de") by vger.kernel.org with ESMTP id S261962AbVHEVwz (ORCPT ); Fri, 5 Aug 2005 17:52:55 -0400 Date: Fri, 5 Aug 2005 23:52:47 +0200 From: Martin Loschwitz To: Chris Wright Cc: linux-kernel@vger.kernel.org Subject: Re: local DDOS? Kernel panic when accessing /proc/ioports Message-ID: <20050805215247.GA25652@minerva.local.lan> References: <20050805192628.GA24706@minerva.local.lan> <20050805195056.GB7991@shell0.pdx.osdl.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="sm4nu43k4a2Rpi4c" Content-Disposition: inline In-Reply-To: <20050805195056.GB7991@shell0.pdx.osdl.net> User-Agent: Mutt/1.5.9i X-Greylist: Sender succeded SMTP AUTH authentication, not delayed by milter-greylist-1.4 (hobbit.neveragain.de [217.69.76.1]); Fri, 05 Aug 2005 23:52:46 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --sm4nu43k4a2Rpi4c Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Aug 05, 2005 at 12:50:56PM -0700, Chris Wright wrote: > * Martin Loschwitz (madkiss@madkiss.org) wrote: > > I just ran into the following problem: Having updated my box to 2.6.12.= 3,=20 > > I tried to start YaST2 and noticed a kernel panic (see below). Some qui= ck > > debugging brought the result that the kernel crashes while some user (n= ot > > even root ...) tries to access /proc/ioports. Is this a known problem a= nd > > if so, is a fix available? >=20 > First I've heard of it. I can't trigger here with simple cat > /proc/ioports. Must be specific to your setup. What was the last > working kernel, and what's that ioport output look like? >=20 The situation in this case is somewhat obscene ... Originally, I had exactly this problem while using the Knoppix standard kernel (2.6.11 vanilla SMP). I then went to compile 2.6.12.3, also with SMP, and it showed exactly the same problem. I disable SMP, tried again -- voila, it worked. The kernel that I am encountering this error again now is 2.6.12.3 -- witho= ut SMP or whatsoever. I'm just out of ideas on how to fix it this time. > thanks, > -chris --=20 .''`. Martin Loschwitz Debian GNU/Linux developer : :' : madkiss@madkiss.org madkiss@debian.org `. `'` http://www.madkiss.org/ people.debian.org/~madkiss/ `- Use Debian GNU/Linux 3.0! See http://www.debian.org/ --sm4nu43k4a2Rpi4c Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFC89+vHPo+jNcUXjARAvSRAJ9nHLXulfOscf+Q+wTNangbcvkWvgCgvfL6 Hec334bcxo5S2PTrAfpTXE8= =CBJI -----END PGP SIGNATURE----- --sm4nu43k4a2Rpi4c--