Re: MCS and default labels

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Stephen Smalley wrote:
> > Maybe I am not seeing something after all. Suppose I use the full MLS
> > variant and give a user the labels c1,c2. How exactly would it happen
> > that in a c1 dir he would automatically create c1 files, and in c1,c2
> > dir c1,c2 files?
> 
> He wouldn't.  The first case would violate MLS write-down restrictions.

Ah, I see the point now. In some literature, categories are
discretionary even when sensitivity levels are used. So a s1:c1 process
can write to s1, but not to s0:c1.

> Different people have different views of MCS.  And it hasn't really
> worked out the way it was envisioned.  There has been some discussion of
> this, including during the SELinux summits (minutes are published).

Thanks, I guess I need to read more on that. I've googled the 2007
minutes, but not the other ones. Would you happen to have some links?

Regards,
Michal Svoboda


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