Re: [PATCH 05/10] Allow colord_t to read the color profile stored in ~/.local/share/icc/

Dominick Grift <[email protected]> Sat, 12 Oct 2019 09:53:20 +0200
Newsgroups	org.kernel.vger.selinux-refpolicy
Message-ID	<[email protected]>
On Fri, Oct 11, 2019 at 02:54:23PM +0200, Dominick Grift wrote:
> On Fri, Oct 11, 2019 at 02:24:11PM +0200, Laurent Bigonville wrote:
> > From: Laurent Bigonville <[email protected]>
> > 
> > colord reads the color profiles files that are stored in
> > ~/.local/share/icc/, The file descriptor to that file is passed over
> > D-Bus so it needs to be inherited
> 
> This patch is cutting corners a little. It only takes unconfined_t into account and not the confined users (an alternative would be to call "userdom_use_all_users_fds(colord_t)" instead. Which is arguable too broad as well but closest you can get to "common users" without surgery.
> Secondly xdg_read_data_files() is a little broad.
> Also if this patch implies that whatever maintains XDG_DATA_DIR/icc is able to maintain generic xdg data files, which is arguable broad as well.
> 
> The second and third argument are subject to how far you want to take things, and so I won't object if that is not addressed.
> The fd use issue, in my view, should be addressed for all login (common) users with colord access.

Actually, I take this review back. I am not sure how to best deal with this fd.

> 
> > 
> > ----
> > time->Sat Oct  5 11:35:54 2019
> > type=AVC msg=audit(1570268154.991:223): avc:  denied  { read } for  pid=852 comm="gdbus" path="/home/bigon/.local/share/icc/edid-fcd2cc06dec015794261e6b7756cbcec.icc" dev="dm-3" ino=413402 scontext=system_u:system_r:colord_t:s0 tcontext=unconfined_u:object_r:xdg_data_t:s0 tclass=file permissive=1
> > type=AVC msg=audit(1570268154.991:223): avc:  denied  { use } for  pid=852 comm="gdbus" path="/home/bigon/.local/share/icc/edid-fcd2cc06dec015794261e6b7756cbcec.icc" dev="dm-3" ino=413402 scontext=system_u:system_r:colord_t:s0 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=fd permissive=1
> > ----
> > time->Sat Oct  5 11:35:55 2019
> > type=AVC msg=audit(1570268155.007:225): avc:  denied  { getattr } for  pid=852 comm="colord" path="/home/bigon/.local/share/icc/edid-fcd2cc06dec015794261e6b7756cbcec.icc" dev="dm-3" ino=413402 scontext=system_u:system_r:colord_t:s0 tcontext=unconfined_u:object_r:xdg_data_t:s0 tclass=file permissive=1
> > ----
> > time->Sat Oct  5 11:35:55 2019
> > type=AVC msg=audit(1570268155.007:226): avc:  denied  { map } for  pid=852 comm="colord" path="/home/bigon/.local/share/icc/edid-fcd2cc06dec015794261e6b7756cbcec.icc" dev="dm-3" ino=413402 scontext=system_u:system_r:colord_t:s0 tcontext=unconfined_u:object_r:xdg_data_t:s0 tclass=file permissive=1
> > ----
> > 
> > Signed-off-by: Laurent Bigonville <[email protected]>
> > ---
> >  policy/modules/services/colord.te | 7 +++++++
> >  1 file changed, 7 insertions(+)
> > 
> > diff --git a/policy/modules/services/colord.te b/policy/modules/services/colord.te
> > index fada3fb8..2fbb1835 100644
> > --- a/policy/modules/services/colord.te
> > +++ b/policy/modules/services/colord.te
> > @@ -141,6 +141,13 @@ optional_policy(`
> >  	udev_read_pid_files(colord_t)
> >  ')
> >  
> > +# colord reads the color profiles files that are stored in ~/.local/share/icc/,
> > +# The file descriptor to that file is passed over D-Bus so it needs to be inherited
> > +optional_policy(`
> > +	unconfined_use_fds(colord_t)
> > +	xdg_read_data_files(colord_t)
> > +')
> > +
> >  optional_policy(`
> >  	xserver_read_xdm_lib_files(colord_t)
> >  	xserver_use_xdm_fds(colord_t)
> > -- 
> > 2.23.0
> > 
> 
> -- 
> Key fingerprint = 5F4D 3CDB D3F8 3652 FBD8 02D5 3B6C 5F1D 2C7B 6B02
> https://sks-keyservers.net/pks/lookup?op=get&search=0x3B6C5F1D2C7B6B02
> Dominick Grift



-- 
Key fingerprint = 5F4D 3CDB D3F8 3652 FBD8 02D5 3B6C 5F1D 2C7B 6B02
https://sks-keyservers.net/pks/lookup?op=get&search=0x3B6C5F1D2C7B6B02
Dominick Grift
signature.asc (application/pgp-signature, 659 B)