From owner-freebsd-current@FreeBSD.ORG  Sun Apr 16 13:08:11 2006
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Date: Sun, 16 Apr 2006 17:05:36 +0400
From: Sergey Matveychuk <sem@FreeBSD.org>
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Subject: kgdb problem
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I've tried to get a back trace from kernel core. But can't:

% kgdb /boot/kernel/kernel /var/crash/vmcore.0
kgdb: kvm_read: invalid address (0x50012)
kgdb: kvm_read: invalid address (0x8256b3c)
kgdb: kvm_read: invalid address (0x4b)
kgdb: kvm_read: invalid address (0x4b)
kgdb: kvm_read: invalid address (0x4b)
kgdb: kvm_read: invalid address (0x4b)
...
(an infinity loop here)

How to fix it?
-- 
Dixi.
Sem.