From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751479AbaEGQ6U (ORCPT ); Wed, 7 May 2014 12:58:20 -0400 Received: from mail-lb0-f170.google.com ([209.85.217.170]:49071 "EHLO mail-lb0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751282AbaEGQ6P (ORCPT ); Wed, 7 May 2014 12:58:15 -0400 Date: Wed, 7 May 2014 20:58:11 +0400 From: Cyrill Gorcunov To: Vince Weaver Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar Subject: Re: perf_fuzzer crash on pentium 4 Message-ID: <20140507165811.GG1444@moon> References: <20140506202307.GA1458@moon> <20140506214630.GB1458@moon> <20140507164902.GD1444@moon> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140507164902.GD1444@moon> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 07, 2014 at 08:49:02PM +0400, Cyrill Gorcunov wrote: > On Wed, May 07, 2014 at 12:46:24PM -0400, Vince Weaver wrote: > > > > sorry for the delay, I like to compile kernels locally and it takes a > > really long time to build a ftrace-enabled kernel on a pentium 4 it seems. > > > > Anyway I threw some printks in, and this is what I get: > > > > [ 447.572626] VMW: bind=NULL config=6b6b6b6b6b6b6b6b > > > > I have slab poisoning turned on. Use after free? > > Looks so. It's list poison iirc, thus i think it comes from upper level, > ie from perf general code. Vince, I'm trying to figure out where it might come from, but no ideas yet.