[refpolicy] fcontexts for XDG_RUNTIME_DIR /run/user

[cpebenito@tresys.com (Christopher J. PeBenito)]

On 4/11/2016 1:11 PM, Jason Zaman wrote:
> Hi all,
> 
> I submitted patches to add USERID and USERNAME to genhomedircon[1] and
> am now trying to fix refpol to work with it.
> 
> What labels do we want for things in /run/user?
> Currently refpol has the following which seems pretty weird:
> /var/run/user(/.*)? gen_context(system_u:object_r:var_auth_t,s0)
> It was originally added from fedora but fedora has since dropped that.
> 
> fedora now has:
> /var/run/user(/.*)? gen_context(system_u:object_r:user_tmp_t,s0)
> 
> The problem with that fcontext is that users have write perms towards
> user_tmp_t so they would be able to do other things in /run/user/
> instead of only within /run/user/%{USERID}/.
> 
> I think we should have some kind of _root_t and _home_t like how things
> are for /home and /home/USERNAME

This makes sense.


> In gentoo we have an xdg module which adds xdg_runtime_home_t which we
> have for the user's dir. I was thinking to add an xdg_runtime_dir_t or
> _root_t. then things would get search perms towards that root dir and
> get normal write perms within the actual runtime dir. Only
> logind/consolekit would need to manage xdg_runtime_dir_t.
> 
> If we send (parts of?) the xdg module upstream from gentoo, would it be
> accepted? and if not, I want to at least fix the label for /run/user/
> (xdg_runtime_dir_t or whatever is decided) in refpol and then I can
> carry the xdg_runtime_home_t part in gentoo only.

Which group (if any) specified how /run/user/UID should be used? XDG?

-- 
Chris PeBenito
Tresys Technology, LLC
www.tresys.com | oss.tresys.com