Return-path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115]:44749 "EHLO mtiwmhc11.worldnet.att.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750736AbYGUU2b (ORCPT ); Mon, 21 Jul 2008 16:28:31 -0400 Message-ID: <4884F16D.7010709@lwfinger.net> (sfid-20080721_222836_034954_579C3DAE) Date: Mon, 21 Jul 2008 15:28:29 -0500 From: Larry Finger MIME-Version: 1.0 To: Linus Torvalds CC: Ingo Molnar , Ian Schram , David Miller , akpm@linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, wireless , j@w1.fi Subject: Re: [crash] BUG: unable to handle kernel NULL pointer dereference at 0000000000000370 References: <20080721134506.GA27598@elte.hu> <20080721143023.GA32451@elte.hu> <20080721150446.GA17746@elte.hu> <20080721.082419.70392960.davem@davemloft.net> <4884D2F1.2030704@telenet.be> <20080721190646.GA19044@elte.hu> <4884DFEE.4060003@lwfinger.net> <20080721193425.GA29287@elte.hu> <4884E6E6.7010800@lwfinger.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: Linus Torvalds wrote: > > On Mon, 21 Jul 2008, Larry Finger wrote: >> Yes, I'm chasing a distinct bug. The header for mine is >> >> Jul 21 12:19:37 larrylap kernel: kernel BUG at net/core/dev.c:1328! > > Ok, that one is fixed now in my tree. Or at least it's turned into a > warning, so the machine should work. > >> With an invalid opcode, mine is likely due to stack corruption. > > No, invalid opcode is because we use the "ud2" instruction for BUG(), > which causes an invalid op exception. So any BUG[_ON]() will always cause > that on x86. Thanks for the explanation. With your latest tree, I do get the warning. Unfortunately, it still breaks my wireless and I still need to do the bisection. That is complicated by getting a kernel that won't build after the first try. I think I now have a workaround. Larry