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Date: Mon, 04 Jun 2012 13:55:10 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: "Alexander V. Chernikov" <melifaro@FreeBSD.org>
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Cc: freebsd-net@FreeBSD.org, FreeBSD-Current <freebsd-current@FreeBSD.org>
Subject: Re: null pointer panic in bpf_peers_present
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on 04/06/2012 09:48 Alexander V. Chernikov said the following:
> On 04.06.2012 02:22, Andriy Gapon wrote:
>> on 03/06/2012 23:56 Andriy Gapon said the following:
>>>
>>> I wonder if anybody else is seeing this and if there is a fix...
>>> This is very recent (today's) FreeBSD head with pretty dull network
>>> configuration.  During boot I run into the following panic:
>>>
>>> <118>Setting hostname: xxxxx
>>> <118>Starting dhclient.
>>>
>> My current guess is that the panic occurs because of the newly added (r235745)
>> bpf_ifdetach which is an ifnet_departure_event handler.  My rc.conf is
>> configured to do interface renaming and SIOCSIFNAME seems to post
>> ifnet_departure_event followed by ifnet_arrival_event.
>>
>> Not sure if it's a window between ifnet_departure_event and ifnet_arrival_event
>> when if_bpf is NULL, or if if_bpf is never restored in this case.
> if_bpf is never restored.
> 
> Can you please try an attached patch ?

I can boot successfully with this patch.  Thank you!

-- 
Andriy Gapon