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Date: Fri, 18 Aug 2006 15:14:57 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Yar Tikhiy <yar@comp.chem.msu.su>
Message-ID: <20060818191457.GA78998@xor.obsecurity.org>
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Cc: pjd@freebsd.org, current@freebsd.org
Subject: Re: mount * 2 + umount + lookup = GEOM panic
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On Fri, Aug 18, 2006 at 10:46:57PM +0400, Yar Tikhiy wrote:
> Hi all,
>=20
> Here is a recipe how to panic CURRENT's GENERIC kernel from the
> command line:
>=20
> (enter single-user mode)
>=20
> # mount -r /usr
> # mount -r /usr
> # umount /usr
> # cat
> [panic!]
>=20
> As shown below, the panic happens in GEOM when /bin/sh searches
> $PATH for cat(1).  The recipe works in 6-STABLE, too.  Is anybody
> interested?  Thanks!

This has been reported a number of times before, apparently it's
difficult to solve.

Kris

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