Re: [PATCH] capabilities: Ambient capability set V2

On Sat, Mar 07, 2015 at 09:09:05AM -0600, Christoph Lameter wrote:

On Fri, 6 Mar 2015, Serge E. Hallyn wrote:

quoted

quoted

I think that's right.  fI doesn't set pI.

Right.  The idea is that for the running binary to get capability x in its
pP, its privileged ancestor must have set x in pI, and the binary itself
must be trusted with x in fI.

The ancestor here is ambient_test and when it is run pI will not be set
despite the cap setting.

ambient_test is supposed to set it.

Therefore anything is spawns cannot have the inheritance bits set either.
This plainly does not make any sense whatsoever. If this is so as it seems
to be then we should be able to remove the inheritance bits because they
have no effect.