From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966142AbdADDmD (ORCPT ); Tue, 3 Jan 2017 22:42:03 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:55769 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935344AbdADDl6 (ORCPT ); Tue, 3 Jan 2017 22:41:58 -0500 From: Gabriel Krisman Bertazi To: kernel test robot Cc: Daniel Vetter , LKML , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, lkp@01.org Subject: Re: [lkp-developer] [drm] 75f6dfe3e6: BUG:unable_to_handle_kernel Organization: Collabora References: <20170104004504.GA721@yexl-desktop> Date: Wed, 04 Jan 2017 01:41:39 -0200 In-Reply-To: <20170104004504.GA721@yexl-desktop> (kernel test robot's message of "Wed, 4 Jan 2017 08:45:04 +0800") Message-ID: <87a8b7fq4s.fsf@dilma.collabora.co.uk> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org kernel test robot writes: > > on test machine: qemu-system-x86_64 -enable-kvm -m 320M > > caused below changes: > > [ 1.608985] mwave: mwavedd::mwave_init: Error: Failed to initialize > [ 1.609295] Hangcheck: starting hangcheck timer 0.9.1 (tick is 180 seconds, margin is 60 seconds). > [ 1.609913] [drm] radeon kernel modesetting enabled. > [ 1.610407] BUG: unable to handle kernel NULL pointer dereference at 0000002c > [ 1.610833] IP: [<8143c0ba>] drm_dev_register+0xe9/0x173 > [ 1.611131] *pdpt = 0000000000000000 *pde = f000ff53f000ff53 > [ 1.611427] I believe this is already fixed by 6098909cf2d0 ("drm: Avoid NULL dereference of drm_device.dev"). But right now the tip of the drm-intel-nightly already includes that patch, so I'm not sure if the test included it, I think not. I gave it a try with the jobfile just to be sure on top of drm-misc-next, and I couldn't reproduce the error anymore after applying Chris' patch (but I could reproduce the Oops when trying only with my patch). Also, sorry for the noise and lesson learned about virtual devices :( -- Gabriel Krisman Bertazi