Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752199AbZG1KBl (ORCPT ); Tue, 28 Jul 2009 06:01:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750743AbZG1KBk (ORCPT ); Tue, 28 Jul 2009 06:01:40 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:32831 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750733AbZG1KBk (ORCPT ); Tue, 28 Jul 2009 06:01:40 -0400 Date: Tue, 28 Jul 2009 11:00:28 +0100 From: Alan Cox To: Andi Kleen Cc: James Morris , James Carter , Eric Paris , linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@tycho.nsa.gov, Stephen Smalley , spender@grsecurity.net, Daniel J Walsh , cl@linux-foundation.org, Arjan van de Ven , kees@outflux.net, Chad Sellers , Tetsuo Handa , mingo@elte.hu Subject: Re: mmap_min_addr and your local LSM (ok, just SELinux) Message-ID: <20090728110028.31fa9a6f@lxorguk.ukuu.org.uk> In-Reply-To: <87zlapgo2u.fsf@basil.nowhere.org> References: <1248132223.2654.278.camel@localhost> <1248187482.19456.90.camel@moss-lions.epoch.ncsc.mil> <20090728011943.589176cb@lxorguk.ukuu.org.uk> <87zlapgo2u.fsf@basil.nowhere.org> X-Mailer: Claws Mail 3.7.1 (GTK+ 2.14.7; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 914 Lines: 20 On Tue, 28 Jul 2009 11:21:29 +0200 Andi Kleen wrote: > Alan Cox writes: > > > A dumb question perhaps, but while addling my brain over the tty layer I > > was wondering if for the specific case of jump through NULL (which seems > > to be the most common but by no means only problem case that gets > > exploited) is there any reason we can't set a default breakpoint for > > You mean a hardware breakpoint? Hardware break points are a precious > scarce resource. The people who rely on them would be likely > unhappy if you take one way from them. They are a tiny minority and could always turn such protection off. -- 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/