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Date: Fri, 28 Nov 2003 11:49:45 +0300 (MSK)
From: Yuriy Tsibizov <Yuriy.Tsibizov@gfk.ru>
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Subject: Re: recent current panic
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>> It looks very similar to
>> http://www.freebsd.org/cgi/query-pr.cgi?pr=59576. You can revert to
>> version 1.28 of net/bpf.h if you need tcpdump on lo, tun, ic, plip,
>> disc or gif interface right now.

> just to note: I ran tcpdump on tunN (which was a pppoe interface) w/o
> problems two days ago (with a recent world) while debugging and
> testing other net related things.

Do you have "options INVARIANTS" in your kernel configuration?
M_ASSERTVALID(..) (that was added to BPF_MTAP macro) do nothing if you
don't have INVARIANTS enabled.

Yuriy.