Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261267AbVA1Hds (ORCPT ); Fri, 28 Jan 2005 02:33:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261501AbVA1Hds (ORCPT ); Fri, 28 Jan 2005 02:33:48 -0500 Received: from canuck.infradead.org ([205.233.218.70]:8196 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S261267AbVA1Hdr (ORCPT ); Fri, 28 Jan 2005 02:33:47 -0500 Subject: Re: Patch 4/6 randomize the stack pointer From: Arjan van de Ven To: Jirka Kosina Cc: John Richard Moser , linux-kernel@vger.kernel.org, akpm@osdl.org, torvalds@osdl.org In-Reply-To: References: <20050127101117.GA9760@infradead.org> <20050127101322.GE9760@infradead.org> <41F92721.1030903@comcast.net> Content-Type: text/plain Date: Fri, 28 Jan 2005 08:33:39 +0100 Message-Id: <1106897619.4172.0.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: 663 Lines: 15 > I thought that this was the original purpose of the "stack randomization" > which is shipped for example by RedHat kernels, as the randomization is > quite small and easy to bruteforce, so it can't serve too much as a buffer > overflow protection. correct; that was for the p4 hyperthreading case (that code fwiw is still in the 2.6 mainline kernel and active; it randomizes over an 8k region for this purpose) - 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/