From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gerd Hoffmann <kraxel@suse.de>
Subject: Re: Re: [PATCH] Xen Guest Kexec
Date: Wed, 01 Mar 2006 15:10:17 +0100
Message-ID: <4405AB49.9020704@suse.de>
References: <A95E2296287EAD4EB592B5DEEFCE0E9D40A892@liverpoolst.ad.cl.cam.ac.uk>
	<08134dbedd3f8cf9e06f9876efe364bb@cl.cam.ac.uk>
	<44031C17.1030502@suse.de>
	<497e0e82f56e48142857ac3e0280d691@cl.cam.ac.uk>
	<44058EED.7060006@suse.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <44058EED.7060006@suse.de>
List-Unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Gerd Hoffmann <kraxel@suse.de>
Cc: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>, xen-devel@lists.xensource.com, Mark Williamson <mark.williamson@cl.cam.ac.uk>, Horms <horms@verge.net.au>
List-Id: xen-devel@lists.xenproject.org

> Thanks.  Unfortunaly I can take down Xen now by trying to use that code
> path, see the log below.

> (XEN) ----[ Xen-3.0.0    Not tainted ]----
> (XEN) CPU:    1
> (XEN) EIP:    e008:[<ff13383c>] free_l2_table+0x53/0x78

xen tries to dereference a pointer it got from map_domain_page() here.
Guess it points into nowhere because we are running the idle page
tables, not the domain page tables at that point.

cheers,

  Gerd

-- 
Gerd 'just married' Hoffmann <kraxel@suse.de>
I'm the hacker formerly known as Gerd Knorr.
http://www.suse.de/~kraxel/just-married.jpeg