From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755638Ab2B0VbA (ORCPT ); Mon, 27 Feb 2012 16:31:00 -0500 Received: from shards.monkeyblade.net ([198.137.202.13]:36788 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755456Ab2B0Va6 (ORCPT ); Mon, 27 Feb 2012 16:30:58 -0500 Date: Mon, 27 Feb 2012 16:30:44 -0500 (EST) Message-Id: <20120227.163044.2168482307021109001.davem@davemloft.net> To: mroos@linux.ee Cc: sam@ravnborg.org, tj@kernel.org, grant.likely@secretlab.ca, rob.herring@calxeda.com, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: OF-related boot crash in 3.3.0-rc3-00188-g3ec1e88 From: David Miller In-Reply-To: References: <20120227194341.GA1448@merkur.ravnborg.org> X-Mailer: Mew version 6.4 on Emacs 23.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.6 (shards.monkeyblade.net [198.137.202.13]); Mon, 27 Feb 2012 13:30:47 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Meelis Roos Date: Mon, 27 Feb 2012 23:25:11 +0200 (EET) >> Could you try to give this a quick spin and see if something >> turns up. I you have time it would be good to try on a box >> that worked before and one that was fixed by the patch from Tejun. > > Neither of the machines - already working one and "fixed with the > rounding patch" one emit any prot: messages. I think the issue is that OF writes past the end of the buffer even though the length it reports is smaller than what it writes. That's why we really need to fill the memblock memory with magic numbers and scan every allocation for free memory with corrupted magic values.