[ubuntu-hardened] Kernel Panic with SELinux and NFS?

[Kees Cook]

Hi Darren,

On Sun, Apr 12, 2009 at 10:41:00PM +0100, Darren McGuicken wrote:
> Hardy server without SELinux, sharing files over NFSv4, Jaunty beta on
> my laptop with SELinux enabled == Kernel Panic and hard lock (on the
> server!) when accessing files on the NFS share...  The panic referenced
> NFS but didn't produce a dump.  It happened twice before I was able to
> guess that SELinux was the only new factor in the mix.  Now booting with
> SELinux disabled on the laptop and the server is stable again.

Owch.  :(

> 1) Is this scenario, as describled, even remotely plausible?

Well, if it's happening to you, there must be a reason.  :)

> 2) Who on earth do I raise the bug report to?

If you can reduce it to a series of steps that is easy to reproduce, the
best place by far would to be to open a Launchpad bug report against
"linux".  I recommend using the "ubuntu-bug linux" command as that will
attach various commonly-requested files, etc.

The Ubuntu Kernel team would be responsible for trying to get a fix in for
it.

-Kees

-- 
Kees Cook
Ubuntu Security Team