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Date: Sat, 27 May 2006 18:22:13 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Joost Bekkers <joost@jodocus.org>, freebsd-hackers@freebsd.org
Message-ID: <20060527222213.GA13879@xor.obsecurity.org>
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Cc: 
Subject: Re: Trouble debugging a kernel dump (kgdb: kvm_read: invalid
	address)
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On Sat, May 27, 2006 at 12:59:19PM +0200, Joost Bekkers wrote:
> Hi
>=20
> The problem is probably in front of the keyboard, but I don't know what I=
'm
> doing wrong.
>=20
> A pc of a friend of mine has been crashing lately after installing 6.0R o=
n it.
> It has ran 4.10R rock solid ever since it was released.
>=20
> Whenever I try to open the dump I get the following:
>=20
> # kgdb -d /usr/crash/ -n 0 /usr/src/sys/i386/compile/SAPPHIRE/kernel.debu=
g=20
> 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)
>=20
> Thank for any help you can give.

Wrong kernel, usually.

Kris

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