From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: DoS by cat /proc/net/ip_conntrack ? Date: Sat, 8 Mar 2008 15:44:26 +0100 Message-ID: <20080308144426.GB3378@ami.dom.local> References: <20080306134037.M70019@visp.net.lb> <47D28601.4080106@gmail.com> <47D28786.80600@gmail.com> <20080308142254.M64724@visp.net.lb> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Krzysztof Oledzki , netdev@vger.kernel.org To: Denys Fedoryshchenko Return-path: Received: from ug-out-1314.google.com ([66.249.92.174]:64190 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752865AbYCHOhZ (ORCPT ); Sat, 8 Mar 2008 09:37:25 -0500 Received: by ug-out-1314.google.com with SMTP id z38so4593402ugc.16 for ; Sat, 08 Mar 2008 06:37:23 -0800 (PST) Content-Disposition: inline In-Reply-To: <20080308142254.M64724@visp.net.lb> Sender: netdev-owner@vger.kernel.org List-ID: On Sat, Mar 08, 2008 at 04:24:34PM +0200, Denys Fedoryshchenko wrote: > For me personally, i think must be as a rule, that _READING_ must not hang > whole system by consuming all resources (router becoming completely > unreachable and blocking all traffic passing thru it). It can hang console, > current program, but not crash router. IMHO you're right, and it's a bug. Only calling this DOS isn't probably very right if only root can do this, but maybe I'm wrong. Jarek P.