From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759581AbaGOXBm (ORCPT ); Tue, 15 Jul 2014 19:01:42 -0400 Received: from mail-ig0-f177.google.com ([209.85.213.177]:41056 "EHLO mail-ig0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759474AbaGOXBh (ORCPT ); Tue, 15 Jul 2014 19:01:37 -0400 Date: Tue, 15 Jul 2014 16:01:34 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Sasha Levin cc: Andrew Morton , Heiko Carstens , linux-fsdevel , Al Viro , Jan Kara , Dave Jones , LKML , Linus Torvalds Subject: Re: fs: use after free in /proc/pid/mountinfo In-Reply-To: <53C53223.5040502@oracle.com> Message-ID: References: <53B3F331.7090204@oracle.com> <53B4CAB8.5070407@oracle.com> <53B6C051.2060704@oracle.com> <20140706100420.GB3589@osiris> <20140709142406.GA27561@osiris> <20140709133138.c523aa03883be5417a4d19a4@linux-foundation.org> <53BDBDE7.8090600@oracle.com> <20140709155939.48b126f891132370532cb999@linux-foundation.org> <53C53223.5040502@oracle.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 15 Jul 2014, Sasha Levin wrote: > I've been running mainline for a while, and while I can reproduce a different > bug for Hugh, I can't reproduce this one at all. Not sure how to call it now, > maybe memory corruption from somewhere else (I did find an unrelated memory > corruption couple days ago)? > I have a very large /proc/pid/mountinfo on one of my busy systems with VM and slub debugging enabled and have not been able to reproduce the issue while reading it in a loop for 24 hours. I would call the patch good on that basis, but it's very strange you'd report this problem a day after the patch was merged and could not reproduce it once it was reverted. (Unless the patch was misapplied locally and reapplying it now worked, but I doubt you originally merged -mm patches into a local tree yourself.)