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To: Bill Fenner <fenner@parc.xerox.com>
cc: current@freebsd.org, hackers@freebsd.org, karl@mcs.net
Subject: Re: Crash in -current (from the current SNAP) 
In-reply-to: Your message of "Thu, 10 Oct 1996 14:09:31 PDT."
             <96Oct10.140932pdt.177476@crevenia.parc.xerox.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Thu, 10 Oct 1996 14:24:00 -0700
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>>>>>    (*inetsw[ip_protox[ip->ip_p]].pr_input)(m, hlen);
>
>>What's going on here?
>
>Either ip_protox[ip->ip_p] is out of range (should be 1..7 or 8
>depending on if what options you have in your kernel), or
>inetsw[ip_protox[ip->ip_p]].pr_input is.

   gdb isn't decoding the stack correctly. The real failure is inside the
pr_input routine (probably tcp_input) somewhere.

>>Given that it is a timeout call that is generating this, why do I think 
>>this has something to do with the anti-syn patches?
>
>Nope, this is a software interrupt causing IP to service its input
>queue.

   ...which if the input queue contains SYNs could cause the queue to overrun.
Right? Or am I missing something?

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project