Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753902Ab0KHTgm (ORCPT ); Mon, 8 Nov 2010 14:36:42 -0500 Received: from mail-gx0-f174.google.com ([209.85.161.174]:47910 "EHLO mail-gx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753446Ab0KHTgl convert rfc822-to-8bit (ORCPT ); Mon, 8 Nov 2010 14:36:41 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=WW0Iy4xTVI9zcqBGRnVdG7HlbQ38NeANufZtUNXkzMqNAa2roNiCdknTU+QnhlPvvd Sd3kjTzRYcLRKOdxhdsw9enyXAarIlcOXJsJYfd6L1wCuXXcP+buexzV/mInCpEXWobv DkcABubStxSKdJ3sZEnHCxqG7KYkZBgirMGac= MIME-Version: 1.0 In-Reply-To: <20101108190258.GA1623@arch.trippelsdorf.de> References: <20101108170221.GA1602@arch.trippelsdorf.de> <20101108170737.GA1617@arch.trippelsdorf.de> <20101108184301.GA1614@arch.trippelsdorf.de> <20101108190258.GA1623@arch.trippelsdorf.de> Date: Mon, 8 Nov 2010 14:36:39 -0500 Message-ID: Subject: Re: Radeon RS780 - BUG: unable to handle kernel NULL pointer dereference From: Jerome Glisse To: Markus Trippelsdorf Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, airlied@linux.ie Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1491 Lines: 33 On Mon, Nov 8, 2010 at 2:02 PM, Markus Trippelsdorf wrote: > On Mon, Nov 08, 2010 at 07:43:02PM +0100, Markus Trippelsdorf wrote: >> On Mon, Nov 08, 2010 at 06:07:37PM +0100, Markus Trippelsdorf wrote: >> > On Mon, Nov 08, 2010 at 06:02:21PM +0100, Markus Trippelsdorf wrote: >> > > I can trigger a kernel crash on my system by simply loading this png >> > > image with firefox: >> > > http://mediaarchive.cern.ch/MediaArchive/Photo/Public/2010/1011251/1011251_01/1011251_01-A4-at-144-dpi.jpg >> > >> > Sorry the above link is wrong, this is the right one (that triggers the >> > crash): >> > http://cdsweb.cern.ch/record/1305179/files/HI-150431-630470-huge.png >> >> I triggered it a few more times and took the attached picture. >> It points to the BUG() call at drivers/gpu/drm/ttm/ttm_bo.c:1628 . >> (Sorry for the bad picture quality) > > And here the same BUG in plaintext (should be a bit easier to read): > > Nov ?8 19:28:23 arch kernel: ------------[ cut here ]------------ > Nov ?8 19:28:23 arch kernel: kernel BUG at drivers/gpu/drm/ttm/ttm_bo.c:1628! Quite puzzling it is as if there was already a bo at same offset in rb tree but not in vm mm. Maybe some other race in destruction... Cheers, Jerome Glisse -- 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/