From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263901AbTJFAAh (ORCPT ); Sun, 5 Oct 2003 20:00:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263902AbTJFAAh (ORCPT ); Sun, 5 Oct 2003 20:00:37 -0400 Received: from karnickel.franken.de ([193.141.110.11]:44811 "EHLO karnickel.franken.de") by vger.kernel.org with ESMTP id S263901AbTJFAAg (ORCPT ); Sun, 5 Oct 2003 20:00:36 -0400 Date: Mon, 6 Oct 2003 01:51:49 +0200 To: Christian Kujau Cc: linux-kernel Subject: Re: reiserfs one user DoS? Message-ID: <20031005235149.GA3993@debian.franken.de> References: <20031004120625.GA41175@colocall.net> <3F7EF082.3020702@namesys.com> <3F804234.9070606@g-house.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3F804234.9070606@g-house.de> User-Agent: Mutt/1.5.4i From: erik@debian.franken.de (Erik Tews) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Oct 05, 2003 at 06:09:24PM +0200, Christian Kujau wrote: > Hans Reiser schrieb: > >>I have found such strange thing: > >> > >>pseudo@avalon at 14:04:00 ~> dd if=/dev/zero of=file bs=1 count=0 > >>seek=1000000000000 > >> > >>After that my Intel Celeron 800 MHz/384M RAM 60G/Seagate U6 under > >>Linux-2.4.22-grsec on reiserfs was utilized 100% for more than 2 hours. > >>dd process can't be killed. > >> > >>Is this my flow or real bug? > >> > >it is fixed in reiser4. linux has a lot of DOS vulerabilities to logged > >in users, mostly due to the ability to consume all of some resource or > >another. forgive me for not discussing them publicly.;-) > > perhaps "ulimit" could help here. Really? If I got a process which is unkillable, how can the kernel kill this process if it runs out of cpu-time?