Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932379Ab1BWRQK (ORCPT ); Wed, 23 Feb 2011 12:16:10 -0500 Received: from mail-wy0-f174.google.com ([74.125.82.174]:56876 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755234Ab1BWRQH convert rfc822-to-8bit (ORCPT ); Wed, 23 Feb 2011 12:16:07 -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=UPp8vhV5JF68m4peoMxqcJNIWlw8sobqzvLiOUgv7T5vVORYd9RFE7fSZUom2qx4jU FeBfbkqnlarRhq2zRQeiIdjKdkT+Ci7vX1cTmjC00sOuEvfNr49oQgKemB5kgQoxtBgb 8ziLKigwCheWhyqrLSSWCC+0OmRi5wBv/uEz0= MIME-Version: 1.0 In-Reply-To: References: <20110222140349.GA20708@kryptos.osrc.amd.com> Date: Wed, 23 Feb 2011 19:16:05 +0200 Message-ID: Subject: Re: Linux 2.6.38-rc6 From: Anca Emanuel To: Linus Torvalds Cc: Dave Airlie , linux-fbdev@vger.kernel.org, Ben Skeggs , dri-devel@lists.freedesktop.org, Borislav Petkov , Linux Kernel Mailing List 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: 1917 Lines: 54 On Wed, Feb 23, 2011 at 6:32 PM, Linus Torvalds wrote: > On Tue, Feb 22, 2011 at 9:42 PM, Anca Emanuel wrote: >> General protection fault: >> http://i.imgur.com/TBJ6y.jpg >> >> dmesg: http://pastebin.com/qD8pR8QH >> config: http://pastebin.com/XEurtHWi > > That's drivers/video/fbmem.c: fb_release(), and the "Code:" > disassembly shows that it is > > ?1b: ? e8 f7 c0 29 00 ? ? ? ? ?callq ?xyz > ?20: ? 48 8b 93 b8 03 00 00 ? ?mov ? ?0x3b8(%rbx),%rdx > ?27:* ?48 8b 42 10 ? ? ? ? ? ? mov ? ?0x10(%rdx),%rax ? ? <-- trapping instruction > > which corresponds to > > ? ? ? ?mutex_lock(&info->lock); > ? ? ? ?if (info->fbops->fb_release) > ? ? ? ? ? ? ? ?info->fbops->fb_release(info,1); > > so it looks like 'info->fbops' is invalid. It's in %rdx, and is > 0x00d000ae00b500c2, which is definitely not a valid pointer. Looks > like some bad corruption (looks like a sequence of 16-bit numbers, but > it could be anything). > > Looks like nouveafb took over from vesafb. Did you do anything special > to trigger this? No. Just boot the system. > > Also, you do seem to have some extra patches (yama at the least). Anything else? I used git clone, nothing else. First time 2.6.38-rc6 was working. After an update from ubuntu I get that error at boot. The dmesg is from Ubuntu 11.04 with their kernel and is working fine. > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?Linus > -- > 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/ > -- 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/