Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759116AbZJMHtr (ORCPT ); Tue, 13 Oct 2009 03:49:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759089AbZJMHtq (ORCPT ); Tue, 13 Oct 2009 03:49:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60598 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759030AbZJMHtp (ORCPT ); Tue, 13 Oct 2009 03:49:45 -0400 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <817ecb6f0910121803p52a4049ep4a712545d28bba76@mail.gmail.com> References: <817ecb6f0910121803p52a4049ep4a712545d28bba76@mail.gmail.com> To: Siarhei Liakh Cc: dhowells@redhat.com, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, Arjan van de Ven , James Morris , Andrew Morton , Andi Kleen , Rusty Russell , Thomas Gleixner , "H. Peter Anvin" , Ingo Molnar , Aristeu Rozanski Subject: Re: [PATCH V5] x86: NX protection for kernel data Date: Tue, 13 Oct 2009 08:48:38 +0100 Message-ID: <16086.1255420118@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1476 Lines: 34 Siarhei Liakh wrote: > This patch expands functionality of CONFIG_DEBUG_RODATA to set main > (static) kernel data area as NX. > The following steps are taken to achieve this: > 1. Linker script is adjusted so .text always starts and ends on a page boundary > 2. Linker script is adjusted so .rodata and .data always start and > end on a page boundary > 3. void mark_nxdata_nx(void) added to arch/x86/mm/init.c with actual > functionality: NX is set for all pages from _etext through _end. > 4. mark_nxdata_nx() called from free_initmem() (after init has been released) > 5. free_init_pages() sets released memory NX in arch/x86/mm/init.c > > The patch have been developed for Linux 2.6.31-rc7 x86 by Siarhei Liakh > and Xuxian Jiang . > > V1: initial patch for 2.6.30 > V2: patch for 2.6.31-rc7 > V3: moved all code into arch/x86, adjusted credits > V4: fixed ifdef, removed credits from CREDITS > V5: fixed an address calculation bug in mark_nxdata_nx() > --- > > Signed-off-by: Siarhei Liakh > Signed-off-by: Xuxian Jiang That seems to fix the problem, thanks. Acked-by: David Howells -- 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/