From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([208.118.235.92]:49838)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <lmr@redhat.com>) id 1USXQf-0004IH-7a
	for qemu-devel@nongnu.org; Wed, 17 Apr 2013 14:50:03 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <lmr@redhat.com>) id 1USXQd-0003jX-C6
	for qemu-devel@nongnu.org; Wed, 17 Apr 2013 14:50:01 -0400
Received: from mx1.redhat.com ([209.132.183.28]:19261)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <lmr@redhat.com>) id 1USXQd-0003jB-3t
	for qemu-devel@nongnu.org; Wed, 17 Apr 2013 14:49:59 -0400
Received: from int-mx09.intmail.prod.int.phx2.redhat.com
	(int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22])
	by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r3HInvDB028045
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK)
	for <qemu-devel@nongnu.org>; Wed, 17 Apr 2013 14:49:57 -0400
Message-ID: <1366224595.2041.16.camel@thinkpad-t420s>
From: Lucas Meneghel Rodrigues <lmr@redhat.com>
Date: Wed, 17 Apr 2013 15:49:55 -0300
In-Reply-To: <516D0048.60703@redhat.com>
References: <1366044563.3206.6.camel@thinkpad-t420s>
	<516D0048.60703@redhat.com>
Content-Type: text/plain; charset="UTF-8"
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] [BUG latest master] - qemu segfaults when issuing
 screendump cmd
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Luiz Capitulino <lcapitulino@redhat.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Cleber Rosa <crosa@redhat.com>

On Tue, 2013-04-16 at 09:39 +0200, Gerd Hoffmann wrote:
> On 04/15/13 18:49, Lucas Meneghel Rodrigues wrote:
> > Latest qemu.git master is failing big time to pass sanity checks:
> > 
> > https://bugs.launchpad.net/qemu/+bug/1169254
> > 
> > We've had some issues with the test jobs, and finally managed to
> > stabilize the grid, so we don't have results for the last couple of
> > weeks to bisect the problem.
> 
> Can you try this?
>   git://git.kraxel.org/qemu rebase/pixman
> 
> [ I'm about to prepare a pull req, was planning
>    to do it last week but got sick ... ]

Yes, in your branch, the problem is solved. Anthony came up with an even
simpler reproducer:

$ (sleep 1; echo -e 'screendump abc.ppm\nquit') | MALLOC_PERTURB_=1 x86_64-softmmu/qemu-system-x86_64 -monitor stdio -vnc :0
QEMU 1.4.50 monitor - type 'help' for more information
(qemu) screendump abc.ppm
(qemu) quit

With current master, qemu crashes.

[lmr@thinkpad-t420s qemu-gerd]$ (sleep 1; echo -e 'screendump abc.ppm\nquit') | MALLOC_PERTURB_=1 x86_64-softmmu/qemu-system-x86_64 -monitor stdio -vnc :0
QEMU 1.4.50 monitor - type 'help' for more information
(qemu) screendump abc.ppm
Segmentation fault