Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750889AbWJLUZ7 (ORCPT ); Thu, 12 Oct 2006 16:25:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750912AbWJLUZ7 (ORCPT ); Thu, 12 Oct 2006 16:25:59 -0400 Received: from ug-out-1314.google.com ([66.249.92.168]:50122 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S1750856AbWJLUZ6 (ORCPT ); Thu, 12 Oct 2006 16:25:58 -0400 Message-ID: <474c7c2f0610121325j23320d36i20c71ccaa04645d9@mail.gmail.com> Date: Thu, 12 Oct 2006 16:25:57 -0400 From: "=?UTF-8?Q?G=C3=BCnther_Starnberger?=" To: jplatte@naasa.net Subject: Re: Userspace process may be able to DoS kernel Cc: "Pekka Enberg" , linux-kernel@vger.kernel.org In-Reply-To: <200610122211.16202.lists@naasa.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <474c7c2f0610110954y46b68a14q17b88a5e28ffe8d9@mail.gmail.com> <200610121341.56325.lists@naasa.net> <84144f020610120457g221b8736vebf2f0a634480c05@mail.gmail.com> <200610122211.16202.lists@naasa.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 789 Lines: 20 On 10/12/06, Joerg Platte wrote: > Not that easy, since it takes a few hours to be able to trigger the bug. I > tried to record the system calls with strace but without success. Skype did > not cause any lockups and then crashes... Maybe the timing is too different > with strace. According to [1] there are several anti-debugging techniques used in Skype. I.e. if it notices some sort of debugger it will crash (on purpose). bye, /gst [1] www.blackhat.com/presentations/bh-europe-06/bh-eu-06-biondi/bh-eu-06-biondi-up.pdf - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/