On 6/24/19 4:01 PM, James Morris wrote:

On Fri, 21 Jun 2019, Matthew Garrett wrote:

quoted

Minor updates over V33 - security_is_locked_down renamed to
security_locked_down, return value of security_locked_down is returned
in most cases, one unnecessary patch was dropped, couple of minor nits
fixed.

Thanks for the respin.

We are still not resolved on granularity. Stephen has said he's not sure 
if a useful policy can be constructed with just confidentiality and 
integrity settings. I'd be interested to know JJ and Casey's thoughts on 
lockdown policy flexibility wrt their respective LSMs.

These are also "all or nothing" choices which may prevent deployment due 
to a user needing to allow (presumably controlled or mitigated) exceptions 
to the policy.

I haven't gotten a chance to play with this the way I want to so there is
still a lot of questions regarding its interaction with apparmor and its
policy, but from what I have seen so far it is looking good.

I expect the all or nothing choices may limit its deployments (we really
need to play with this more to say) but we already face similar issues.
There are options we provide at a distro level that we can't turn on by
default, but we do recommend to more security conscious users.

If lockdown was in kernel we would certainly make it available for our
users, we have even had a few people ask about it.