From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiri Slaby Subject: Re: Kernel WARNING via bochsdrmfb mmap Date: Mon, 7 Mar 2016 15:36:58 +0100 Message-ID: <56DD920A.70400@suse.cz> References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wm0-f54.google.com (mail-wm0-f54.google.com [74.125.82.54]) by gabe.freedesktop.org (Postfix) with ESMTPS id 086A16E399 for ; Mon, 7 Mar 2016 14:37:02 +0000 (UTC) Received: by mail-wm0-f54.google.com with SMTP id l68so88999021wml.0 for ; Mon, 07 Mar 2016 06:37:01 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Takashi Iwai , dri-devel@lists.freedesktop.org Cc: Dave Airlie , linux-kernel@vger.kernel.org List-Id: dri-devel@lists.freedesktop.org T24gMDMvMDcvMjAxNiwgMDM6MzAgUE0sIFRha2FzaGkgSXdhaSB3cm90ZToKPiBIaSwKPiAKPiBK aXJpIFNsYWJ5IHJlcG9ydGVkIGEga2VybmVsIFdBUk5JTkcgdHJpZ2dlcmVkIGJ5IHN5emthbGxl ci4gIEl0IGNhbgo+IGJlIHJlbGlhYmx5IHJlcHJvZHVjZWQgdmlhIGZiZGV2IG1tYXAgYWNjZXNz IG9uIGJvY2hzIGRybS4gIFRoZQo+IHdhcm5pbmcgbG9va3MgbGlrZSBiZWxvdzoKPiAKPiBXQVJO SU5HOiBDUFU6IDMgUElEOiAyOTM1NiBhdCAuLi9kcml2ZXJzL2dwdS9kcm0vdHRtL3R0bV9ib192 bS5jOjI2NSB0dG1fYm9fdm1fb3BlbisweDExYS8weDE4MCBbdHRtXSgpCgpCVFcgcnVubmluZyB0 aGUgcmVwcm9kdWNlciBvbiBteSBib3ggZ2l2ZXM6Cng4Ni9QQVQ6IGFjOjUwMSBmcmVlaW5nIGlu dmFsaWQgbWVtdHlwZSBbbWVtIDB4ZTA4M2QwMDAtMHhlMDgzZGZmZl0KCmFuZCBub3QgdGhlIHdh cm5pbmcuCgp0aGFua3MsCi0tIApqcwpzdXNlIGxhYnMKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxA bGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxt YW4vbGlzdGluZm8vZHJpLWRldmVsCg== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753182AbcCGOhg (ORCPT ); Mon, 7 Mar 2016 09:37:36 -0500 Received: from mail-wm0-f41.google.com ([74.125.82.41]:37242 "EHLO mail-wm0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753071AbcCGOhG (ORCPT ); Mon, 7 Mar 2016 09:37:06 -0500 Subject: Re: Kernel WARNING via bochsdrmfb mmap To: Takashi Iwai , dri-devel@lists.freedesktop.org References: Cc: Gerd Hoffmann , Dave Airlie , linux-kernel@vger.kernel.org From: Jiri Slaby Message-ID: <56DD920A.70400@suse.cz> Date: Mon, 7 Mar 2016 15:36:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/07/2016, 03:30 PM, Takashi Iwai wrote: > Hi, > > Jiri Slaby reported a kernel WARNING triggered by syzkaller. It can > be reliably reproduced via fbdev mmap access on bochs drm. The > warning looks like below: > > WARNING: CPU: 3 PID: 29356 at ../drivers/gpu/drm/ttm/ttm_bo_vm.c:265 ttm_bo_vm_open+0x11a/0x180 [ttm]() BTW running the reproducer on my box gives: x86/PAT: ac:501 freeing invalid memtype [mem 0xe083d000-0xe083dfff] and not the warning. thanks, -- js suse labs