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Date:      Thu, 02 Sep 2010 15:52:11 +0200
From:      Ivan Voras <ivoras@freebsd.org>
To:        freebsd-stable@freebsd.org
Cc:        freebsd-net@freebsd.org
Subject:   Re: 8-stable crashes in vmware (possible em driver issue?)
Message-ID:  <i5oa69$l2t$1@dough.gmane.org>
In-Reply-To: <hm4fug$vku$1@dough.gmane.org>
References:  <hjg291$tvj$1@ger.gmane.org> <hm4fug$vku$1@dough.gmane.org>

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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.





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