Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934562AbXHMXCw (ORCPT ); Mon, 13 Aug 2007 19:02:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753479AbXHMXCm (ORCPT ); Mon, 13 Aug 2007 19:02:42 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:55520 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750932AbXHMXCl (ORCPT ); Mon, 13 Aug 2007 19:02:41 -0400 Date: Tue, 14 Aug 2007 00:09:56 +0100 From: Alan Cox To: hinoue@ccsl.carleton.ca Cc: linux-kernel@vger.kernel.org Subject: Re: System call interposition/unprotecting the table Message-ID: <20070814000956.7c8929dd@the-village.bc.nu> In-Reply-To: <20070813180535.vo36rcevi80s0c4c@www.ccsl.carleton.ca> References: <20070813180535.vo36rcevi80s0c4c@www.ccsl.carleton.ca> X-Mailer: Claws Mail 2.10.0 (GTK+ 2.10.14; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 716 Lines: 20 On Mon, 13 Aug 2007 18:05:35 -0400 hinoue@ccsl.carleton.ca wrote: > I have a question about changing the page attributes of the > system call table. Please don't do that. > This works fine on my debian system, but apparently the stock Fedora > kernel (2.6.22) has the system call table write protected. This is to protect it from being changed by an attacker or someone trying to do strange and bogus things to the kernel. What are you actually trying to achieve ? - 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/