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From: Robert Watson <rwatson@FreeBSD.org>
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To: Mike Tancsa <mike@sentex.net>
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Cc: freebsd-stable@freebsd.org, Mikolaj Golub <to.my.trociny@gmail.com>
Subject: Re: RELENG_7 crash
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On Tue, 21 Apr 2009, Mike Tancsa wrote:

> At 04:53 PM 4/21/2009, Mikolaj Golub wrote:
>
>> Just FYI, the same problem has already been registered in pr database as 
>> kern/132734.
>
> Thanks,
>        http://www.freebsd.org/cgi/query-pr.cgi?pr=132734 does look familiar 
> :)  If you disable the snmpwalk, is the box stable ?

It would be interesting to know if this tweak at least eliminates the instant 
panic:

Index: if_mib.c
===================================================================
--- if_mib.c	(revision 191424)
+++ if_mib.c	(working copy)
@@ -82,11 +82,9 @@
  		return EINVAL;

  	if (name[0] <= 0 || name[0] > if_index ||
-	    ifnet_byindex(name[0]) == NULL)
+	    (ifp = ifnet_byindex(name[0])) == NULL)
  		return ENOENT;

-	ifp = ifnet_byindex(name[0]);
-
  	switch(name[1]) {
  	default:
  		return ENOENT;

Robert N M Watson
Computer Laboratory
University of Cambridge