On Mon, 2013-09-16 at 07:57 -0400, Stephen Smalley wrote:
> On 09/16/2013 03:35 AM, Dominick Grift wrote:
> > On Sun, 2013-09-15 at 12:54 -0400, Joshua Brindle wrote:
> >> Dominick Grift wrote:
> >>> I was explaining the concept of (type) attributes using the domain type
> >>> attribute as an example on IRC, and a sharp person embarrassed me by
> >>> noting that the following rule returns nothing where he would have
> >>> expected something:
> >>>
> >>> sesearch -A -d -s domain -c process -p fork
> >>>
> >>> Why does this not return anything? Is is because the target is "self"?
> >>
> >> "self" is resolved by the compiler, it isn't present in the kernel binary.
> >>
> >> You specified -d "do not search for type's attributes" and then gave an
> >> attribute as the source. I'm not sure what the intended behavior was but
> >> excluding the -d gave me back a large set of rules.
> >
> > The result i expected would have been the exact (direct) rule as
> > specified in the policy:
> >
> > allow domain self : process fork;
> >
> > So not the large list that one gets without the -d option because that
> > is not the direct rule
>
> direct means "granted to an individual type, not via attribute". So it
> omits any rules written in terms of attributes.
>
Thanks, alright this is probably last attempt to understand this but really that is not my experience:
Take for example this comparison:
# sesearch -A -d -t file_type | head -n 3
Found 383 semantic av rules:
allow prelude_lml_t file_type : filesystem getattr ;
allow files_unconfined_type file_type : filesystem { mount remount
unmount getattr relabelfrom relabelto transition associate quotamod
quotaget } ;
# sesearch -A -t file_type | head -n 3
Found 40415 semantic av rules:
allow mscan_var_run_t mscan_var_run_t : filesystem associate ;
allow xguest_usertype tetex_data_t : lnk_file { read getattr } ;
The former does not "expand" the target type attribute whereas the
latter expands the type attribute
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