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SubjectRe: [RFC] cgroups: implement device whitelist lsm (v2)
Quoting Greg KH (greg@kroah.com):
> On Thu, Mar 13, 2008 at 08:41:21PM -0500, Serge E. Hallyn wrote:
> > Quoting James Morris (jmorris@namei.org):
> > > On Thu, 13 Mar 2008, Serge E. Hallyn wrote:
> > >
> > > > Quoting James Morris (jmorris@namei.org):
> > > > > On Thu, 13 Mar 2008, Serge E. Hallyn wrote:
> > > > >
> > > > > > True, but while this change simplifies the code a bit, the semantics
> > > > > > seem more muddled - devcg will be enforcing when CONFIG_CGROUP_DEV=y
> > > > > > and:
> > > > > >
> > > > > > SECURITY=n or
> > > > > > rootplug is enabled
> > > > > > capabilities is enabled
> > > > > > smack is enabled
> > > > > > selinux+capabilities is enabled
> > > > >
> > > > > Well, this is how real systems are going to be deployed.
> > > >
> > > > Sorry, do you mean with capabilities?
> > >
> > > Yes.
> > >
> > > All Fedora, RHEL, CentOS etc. ship with SELinux+capabilities. I can't
> > > imagine not enabling them on other kernels.
> > >
> > > > > It becomes confusing, IMHO, if you have to change which secondary LSM you
> > > > > stack with SELinux to enable a cgroup feature.
> > > >
> > > > So you're saying selinux without capabilities should still be able to
> > > > use dev_cgroup? (Just making sure I understand right)
> > >
> > > Nope, SELinux always stacks with capabilities, so havng the cgroup hooks
> > > in capabilities makes sense (rather than having us change the secondary
> > > stacking LSM just to enable a feature).
> >
> > Oh, ok.
> >
> > Will let the patch stand until Pavel and Greg comment then.
>
> My main question was why was that file in the kernel/ directory?
> Shouldn't that also be in the security/ directory?

I'm using cgroups to track the tasks which should have their device
permissions restricted. Right now cgroups are all under kernel/.

> And to be honest, I didn't really look at it at all other than the
> diffstat to make sure you weren't messing with the kobj_map stuff
> anymore :)
>
> thanks,
>
> greg k-h
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