Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268688AbUIQLDK (ORCPT ); Fri, 17 Sep 2004 07:03:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268683AbUIQLDJ (ORCPT ); Fri, 17 Sep 2004 07:03:09 -0400 Received: from gandalf.ios.edu.pl ([193.0.91.125]:16537 "EHLO gandalf.ios.edu.pl") by vger.kernel.org with ESMTP id S268672AbUIQLC6 (ORCPT ); Fri, 17 Sep 2004 07:02:58 -0400 Message-ID: <414AC45B.60404@ios.edu.pl> Date: Fri, 17 Sep 2004 13:02:51 +0200 From: =?ISO-8859-2?Q?Marcin_Ro=BFek?= User-Agent: Mozilla Thunderbird 0.7.1 (X11/20040626) X-Accept-Language: pl, en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Re: kernel BUG at page_alloc.c References: <414834AA.70602@ios.edu.pl> <20040915112102.GA1992@logos.cnet> <414844C5.6080802@ios.edu.pl> <20040915124449.GB2963@logos.cnet> In-Reply-To: <20040915124449.GB2963@logos.cnet> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-MailScanner: Found to be clean X-MailScanner-From: marcin.rozek@ios.edu.pl Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 697 Lines: 16 Marcelo Tosatti wrote: > Yes it is quite serious... the VM is trying to free a page with ->mapping > set (probably a pagecache page) which is not valid thing to happen (thus the BUG). > > You can move to v2.4.27 to confirm you see or do not see the problem there. It's a grsecurity bug: http://forums.grsecurity.net/viewtopic.php?t=933 On clean 2.4.27 everything works fine. It happens only when MPROTECT is turned off in the kernel. Regards, Marcin - 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/