From owner-freebsd-net@FreeBSD.ORG  Mon Aug 31 22:27:47 2009
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9D95B1065670
	for <net@freebsd.org>; Mon, 31 Aug 2009 22:27:47 +0000 (UTC)
	(envelope-from bzeeb-lists@lists.zabbadoz.net)
Received: from mail.cksoft.de (mail.cksoft.de [195.88.108.3])
	by mx1.freebsd.org (Postfix) with ESMTP id 5B0838FC16
	for <net@freebsd.org>; Mon, 31 Aug 2009 22:27:47 +0000 (UTC)
Received: from localhost (amavis.fra.cksoft.de [192.168.74.71])
	by mail.cksoft.de (Postfix) with ESMTP id DDFB141C710;
	Tue,  1 Sep 2009 00:10:06 +0200 (CEST)
X-Virus-Scanned: amavisd-new at cksoft.de
Received: from mail.cksoft.de ([195.88.108.3])
	by localhost (amavis.fra.cksoft.de [192.168.74.71]) (amavisd-new,
	port 10024)
	with ESMTP id s39HelIYH1Vi; Tue,  1 Sep 2009 00:10:06 +0200 (CEST)
Received: by mail.cksoft.de (Postfix, from userid 66)
	id 3F7CE41C729; Tue,  1 Sep 2009 00:10:06 +0200 (CEST)
Received: from maildrop.int.zabbadoz.net (maildrop.int.zabbadoz.net
	[10.111.66.10])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by mail.int.zabbadoz.net (Postfix) with ESMTP id 5008A4448E6;
	Mon, 31 Aug 2009 22:08:37 +0000 (UTC)
Date: Mon, 31 Aug 2009 22:08:37 +0000 (UTC)
From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
X-X-Sender: bz@maildrop.int.zabbadoz.net
To: qingli@freebsd.org
Message-ID: <20090831215129.V93661@maildrop.int.zabbadoz.net>
X-OpenPGP-Key: 0x14003F198FEFA3E77207EE8D2B58B8F83CCF1842
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: FreeBSD networkers mailing list <net@freebsd.org>
Subject: CFR/CFT: plug mbuf leak in new arp code
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 31 Aug 2009 22:27:47 -0000

Hi,

I have a patch for FreeBSD 8.x / 9-CURRENT that plugs an mbuf leak
in the new arp code that needs review and further testing.

Find a longer description of the problem at the beginning of the
patch.  There is a lot of context in the patch; if you want a shorter
one, apply and re-gen it.

If you want to see the current problem, log in to a remote 8/9 machine
and repeatedly type ... over that connection (you need to be su):
 	arp -ad > /dev/null ; netstat -m | head -1
Watch the first number. Warning: doing it too often will make that
machine panic eventually.

Here's the patch:
http://people.freebsd.org/~bz/20090831-01-plug-new-arp-mbuf-leak.diff

Thanks for your help in advance.

/bz

-- 
Bjoern A. Zeeb           What was I talking about and who are you again?