Return-path: Received: from yw-out-2324.google.com ([74.125.46.30]:49274 "EHLO yw-out-2324.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754390AbZCBReV (ORCPT ); Mon, 2 Mar 2009 12:34:21 -0500 MIME-Version: 1.0 In-Reply-To: <20090226170338.GA1745@silver.sucs.org> References: <49A1CA01.9030501@gmail.com> <20090223152724.M82409@bobcopeland.com> <49A321BA.2040500@gmail.com> <49A326A4.8090103@gmail.com> <40f31dec0902231508l512af5b7w68cfcc0bdf3cfa87@mail.gmail.com> <20090224135817.GB6019@hash.localnet> <49A46AD4.3060007@gmail.com> <20090225140139.GA18694@silver.sucs.org> <20090226135938.GA12182@hash.localnet> <20090226170338.GA1745@silver.sucs.org> Date: Mon, 2 Mar 2009 12:34:18 -0500 Message-ID: (sfid-20090302_183427_239180_AD3D43D1) Subject: Re: [ath5k-devel] [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb_alloc) From: Bob Copeland To: Sitsofe Wheeler Cc: Jiri Slaby , Frederic Weisbecker , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, ath5k-devel@venema.h4ckr.net Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Thu, Feb 26, 2009 at 12:03 PM, Sitsofe Wheeler wrote: > On Thu, Feb 26, 2009 at 08:59:39AM -0500, Bob Copeland wrote: >> On Wed, Feb 25, 2009 at 02:01:39PM +0000, Sitsofe Wheeler wrote: >> > It has been days since the original BUG occurred and further it >> > originally had happened in a -tip kernel with kmemcheck compiled into >> > it. I had been utterly unable to reproduce the error on any network with >> > a stock 2.6.29-rc6 kernel. Not even the original -tip kernel produced >> > the error again... > > Note that I was able to reproduce it again : ) So, I took this config and tried a few things without success: - turned on failslab fault injection - added various mdelay()s to try to widen theoretical race conditions - generated traffic with iperf and 'iwlist wlan0 scan' (as root in a loop) At this point, I think ftrace is the way to go. I guess a good start would be the functions in: grep 'ath5k' available_filter_functions | \ egrep -v '(debug)|(eeprom)|(hw)|(intr)' -- Bob Copeland %% www.bobcopeland.com