From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752478Ab1AXWbI (ORCPT ); Mon, 24 Jan 2011 17:31:08 -0500 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:57422 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751527Ab1AXWbH convert rfc822-to-8bit (ORCPT ); Mon, 24 Jan 2011 17:31:07 -0500 Date: Mon, 24 Jan 2011 14:31:41 -0800 (PST) Message-Id: <20110124.143141.104045281.davem@davemloft.net> To: eric.dumazet@gmail.com Cc: runningdoglackey@yahoo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: Problems with /proc/net/tcp6 - possible bug - ipv6 From: David Miller In-Reply-To: <1295732444.2651.68.camel@edumazet-laptop> References: <115440.16148.qm@web63902.mail.re1.yahoo.com> <1295731235.2651.66.camel@edumazet-laptop> <1295732444.2651.68.camel@edumazet-laptop> X-Mailer: Mew version 6.3 on Emacs 23.1 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eric Dumazet Date: Sat, 22 Jan 2011 22:40:44 +0100 > Le samedi 22 janvier 2011 à 22:20 +0100, Eric Dumazet a écrit : >> Le samedi 22 janvier 2011 à 11:42 -0800, PK a écrit : >> > Eric Dumazet wrote: >> > > >> > > I had some incidents, after hours of testing... >> > > >> > > After following patch, I could not reproduce it. >> > >> > >> > Looks like that patch solved the /proc/net/tcp6 problem. The causal commit was >> > the one you identified... confirmed with bisect. >> > >> > These warnings show up when I run the script (or I presume any tcp6 connection >> > flooder) with /proc/sys/net/tcp/ipv4/tcp_tw_recycle enabled. There's textual >> > corruption of the traces a lot of the time. Here's a sample trace that doesn't >> > appear to be corrupt. All the warnings I've seen are from route.c:209, and I >> > don't see how that would cause memory corruption. >> >> Thats a different isse, already reported, under investigation. >> >> David did some changes recently >> >> http://comments.gmane.org/gmane.linux.network/179874 >> >> >> > > In my testings, I even have crashes in cleanup_once() if I > enable /proc/sys/net/ipv4/tcp_tw_recycle I'm looking into this, thanks guys.