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List:       freebsd-hackers
Subject:    Re: Trouble debugging a kernel dump (kgdb: kvm_read: invalid
From:       Kris Kennaway <kris () obsecurity ! org>
Date:       2006-05-27 22:22:13
Message-ID: 20060527222213.GA13879 () xor ! obsecurity ! org
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On Sat, May 27, 2006 at 12:59:19PM +0200, Joost Bekkers wrote:
> Hi
> 
> The problem is probably in front of the keyboard, but I don't know what I'm
> doing wrong.
> 
> A pc of a friend of mine has been crashing lately after installing 6.0R on it.
> It has ran 4.10R rock solid ever since it was released.
> 
> Whenever I try to open the dump I get the following:
> 
> # kgdb -d /usr/crash/ -n 0 /usr/src/sys/i386/compile/SAPPHIRE/kernel.debug 
> kgdb: kvm_read: invalid address (0x50012)
> kgdb: kvm_read: invalid address (0x7)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> kgdb: kvm_read: invalid address (0x50)
> <last line repeats until I kill kgdb)
> 
> Thank for any help you can give.

Wrong kernel, usually.

Kris

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