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Date:      Wed, 1 Jul 2009 21:17:25 +0100 (BST)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        Jung-uk Kim <jkim@FreeBSD.org>
Cc:        Alexey Dokuchaev <danfe@nsu.ru>, freebsd-current@FreeBSD.org
Subject:   Re: Kernel panic with if_sf.ko
Message-ID:  <alpine.BSF.2.00.0907012116370.27367@fledge.watson.org>
In-Reply-To: <200907011613.10550.jkim@FreeBSD.org>
References:  <20090701162108.GA33681@regency.nsu.ru> <200907011613.10550.jkim@FreeBSD.org>

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On Wed, 1 Jul 2009, Jung-uk Kim wrote:

> On Wednesday 01 July 2009 12:21 pm, Alexey Dokuchaev wrote:
>
>> I've started to observe the following rather annoying panic if I boot with 
>> if_sf loaded (via loader.conf) and having sf0 configured via DHCP on recent 
>> -CURRENT.  If I comment out driver from loader.conf and load it manually 
>> (via kldload(8)) after system boots, it loads and gets configured just 
>> fine.
>>
>> Any clues here?  Attached is relevant dmesg + DDB trace (debug kernel with 
>> WITNESS).  I'm happy to provide any additional information (that is, 
>> ps/show uma/malloc, whatever).
>
> Last time I checked, bpf(4) with MAC caused a similar problem when it is 
> destroying bpf descriptor label.  GENERIC includes MAC by default now.  If 
> you don't need MAC, try removing "options MAC" from your kernel 
> configuration.

I was not aware of this problem -- could you provide some more details?  Any 
panic caused by having MAC in the kernel is a bug...

Robert N M Watson
Computer Laboratory
University of Cambridge



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