[PATCH] UBUNTU: SAUCE: [net] disable autoloading of rare protocols

Kees Cook kees.cook at canonical.com
Wed Jan 12 23:57:48 UTC 2011


On Wed, Jan 12, 2011 at 05:34:52PM -0600, Tim Gardner wrote:
> On 01/12/2011 05:06 PM, Kees Cook wrote:
> >On Wed, Jan 12, 2011 at 03:41:21PM -0600, Tim Gardner wrote:
> >>Why don't we blacklist these modules instead of carrying more SAUCE patches?
> >
> >I think that shipping a blacklist file is more of a pain since it would end up as a
> >debian conffile in /etc, so local changes would cause install debconf questions, etc.
> >
> 
> I think the folks that would enable these modules are also capable
> of dealing with answering a debconf question. Furthermore,
> /etc/modprobe.d is a well known place for module loading control.
> Isn't /etc/modprobe.d where Jockey does its thing when switching
> between nvidia and nouveau ?

It's certainly an option. I just try to avoid adding conffiles at all
cost since they're so annoying to deal with in packaging if you want to
remove them, change them, etc.

> >Another option would be to filter it during the modules.aliases file creation so the
> >list is all in one place.
> >
> 
> I'm not sure I follow you here. Are you suggesting we add code in
> the post install hook for the kernel that elides the protocol module
> aliases? That doesn't seem like a very good idea to me wrt updates.

No, I mean patching the kernel's build process to add effectively a
grep -v when generating the modules.aliases file. Though the more I
think about this, the more that seems to really be a patch to depmod,
so I probably don't recommend it now.

Anyway, why not carry the kernel patch so we're at least in sync with
Debian?

-Kees

-- 
Kees Cook
Ubuntu Security Team



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