Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261211AbVA0Vxg (ORCPT ); Thu, 27 Jan 2005 16:53:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261207AbVA0Vxf (ORCPT ); Thu, 27 Jan 2005 16:53:35 -0500 Received: from canuck.infradead.org ([205.233.218.70]:63249 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S261211AbVA0Vx2 (ORCPT ); Thu, 27 Jan 2005 16:53:28 -0500 Subject: Re: Patch 4/6 randomize the stack pointer From: Arjan van de Ven To: John Richard Moser Cc: linux-kernel@vger.kernel.org, akpm@osdl.org In-Reply-To: <41F95F79.6080904@comcast.net> References: <20050127101117.GA9760@infradead.org> <20050127101322.GE9760@infradead.org> <41F92721.1030903@comcast.net> <1106848051.5624.110.camel@laptopd505.fenrus.org> <41F92D2B.4090302@comcast.net> <41F95F79.6080904@comcast.net> Content-Type: text/plain Date: Thu, 27 Jan 2005 22:53:21 +0100 Message-Id: <1106862801.5624.145.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit X-Spam-Score: 4.1 (++++) X-Spam-Report: SpamAssassin version 2.63 on canuck.infradead.org summary: Content analysis details: (4.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.3 RCVD_NUMERIC_HELO Received: contains a numeric HELO 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by canuck.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 592 Lines: 23 > I feel the need to point something out here. > > [TEXT][BRK][MMAP---------------][STACK] > > Here's a normal layout. > > [TEXT][BRK][MMAP-------][STACK][MMAP--] > > Is this one any worse? yes. oracle, db2 and similar like to mmap 2Gb or more *in one chunk*. moving the stack in the middle means the biggest chunk they can mmap shrinks. - 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/