From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 19 Aug 2001 16:38:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 19 Aug 2001 16:37:51 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:53801 "EHLO flinx.biederman.org") by vger.kernel.org with ESMTP id ; Sun, 19 Aug 2001 16:37:41 -0400 To: Jeff Chua Cc: Paul , Jeff Chua , Linux Kernel Subject: Re: [OOPS] repeatable 2.4.8-ac7, 2.4.7-ac6 just run xdos In-Reply-To: From: ebiederm@xmission.com (Eric W. Biederman) Date: 19 Aug 2001 14:30:29 -0600 In-Reply-To: Message-ID: User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.5 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jeff Chua writes: > On Sun, 19 Aug 2001, Paul wrote: > > Actually, it works fine for me too, _if_ I use DOS 5 as > > the boot image, but I changed to DOS 6.22, and its has oops'd > > every time Ive tried it that way. Its just a trigger for whatever > > the real problem is. > > > > Paul > > set@pobox.com > > I'm using dosemu-1.1.1.tgz with Windows 98 [Version 4.10.2222] > > Does "dos" command works for you instead of "xdos" ? > > Did you check your shmmax? > > Try ... > echo 1000000000 >/proc/sys/kernel/shmmax This should be totally irrelevant. You shouldn't be able to crash linux with dosemu unless you are doing direct hardware access. There are a number of cases, where dosemu is different enough it has been known to cause code to go down buggy non-common paths and cause things to fail. This has happened with both X and the kernel. I suspect that is what is happening here. Paul is dosemu configured to do any direct hardware access? Also of interest is that this crash is not even directly triggered by the dosemu process. Instead an interrupt handler is doing something bad. Paul If you can verify that dosemu isn't doing any direct hardware access. i.e. Dosemu isn't suid root, and you have no ports lines you should be fine. Eric