From owner-freebsd-stable  Sat Sep 23 21:20:21 2000
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Date: Sat, 23 Sep 2000 23:20:02 -0500 (CDT)
From: BSD <bsd@shell-server.com>
To: Michael Allman <msa@dinosauricon.com>
Cc: stable@FreeBSD.ORG
Subject: Re: Constant panics on 4.1-STABLE!
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On Wed, 20 Sep 2000, Michael Allman wrote:
> 132		/*
> 133		 * Look up the address in the table for that Address Family
> 134		 */
> 135		if (rnh && (rn = rnh->rnh_matchaddr((caddr_t)dst, rnh)) &&
> 136		    ((rn->rn_flags & RNF_ROOT) == 0)) {

	C doesn't guarantee order of execution in if ( bleh && bleh &&
bleh).  It may very well evaluate it backwards, or from the inside out if
it wants.  No?

> (kgdb) print rnh
> $1 = (struct radix_node_head *) 0x62000000
> (kgdb) print rn
> $2 = (struct radix_node *) 0x0
> (kgdb)

	This goes to show rn is NULL (duh).

		--Bart




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