From owner-freebsd-stable@FreeBSD.ORG  Thu Sep  2 13:52:19 2010
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id B17EF10656F8
	for <freebsd-stable@freebsd.org>; Thu,  2 Sep 2010 13:52:19 +0000 (UTC)
	(envelope-from freebsd-stable@m.gmane.org)
Received: from lo.gmane.org (lo.gmane.org [80.91.229.12])
	by mx1.freebsd.org (Postfix) with ESMTP id 67FDC8FC1A
	for <freebsd-stable@freebsd.org>; Thu,  2 Sep 2010 13:52:19 +0000 (UTC)
Received: from list by lo.gmane.org with local (Exim 4.69)
	(envelope-from <freebsd-stable@m.gmane.org>) id 1OrADC-0006d5-HX
	for freebsd-stable@freebsd.org; Thu, 02 Sep 2010 15:52:18 +0200
Received: from lara.cc.fer.hr ([161.53.72.113])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-stable@freebsd.org>; Thu, 02 Sep 2010 15:52:18 +0200
Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-stable@freebsd.org>; Thu, 02 Sep 2010 15:52:18 +0200
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-stable@freebsd.org
From: Ivan Voras <ivoras@freebsd.org>
Date: Thu, 02 Sep 2010 15:52:11 +0200
Lines: 22
Message-ID: <i5oa69$l2t$1@dough.gmane.org>
References: <hjg291$tvj$1@ger.gmane.org> <hm4fug$vku$1@dough.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Complaints-To: usenet@dough.gmane.org
X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.1.9) Gecko/20100518 Thunderbird/3.0.4
In-Reply-To: <hm4fug$vku$1@dough.gmane.org>
X-Enigmail-Version: 1.0.1
Cc: freebsd-net@freebsd.org
Subject: Re: 8-stable crashes in vmware (possible em driver issue?)
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 02 Sep 2010 13:52:19 -0000

On 02/25/10 01:23, Ivan Voras wrote:
> Ivan Voras wrote:
>> I have a fairly recent 8-stable machine running under VMWare ESXi 3.5
>> (amd64 guest), which apparently crashes every few days from the same
>> causes:
>>
>> em0: discard frame w/o packet header
>> em0: discard frame w/o packet header
>> em0: discard frame w/o packet header
>> Panic string: sbsndptr: sockbuf 0xffffff007cca8c20 and mbuf
>> 0xffffff00490a6400 clashing
>
> In case someone is interested or has an idea - on this machine I have
> multiple crashed cores with similarily strange problems all connected
> with networking and/or the em driver:

...

It looks like the most probable culprit are stf (6to4) support and/or 
something dealing with stf routing (the machine was a stf gateway for a 
small subnet). When disabled, the crashes stop.