Serge E. Hallyn <serue@xxxxxxxxxx> wrote:
> so here is a first attempt at getting keys and uid namespaces
> to play nice. The semantics need some discussion. As I recall
> Eric and yourself appeared to agree that some keyrings should
> be inherited into child user namespaces.
Ummm... If keys are effectively a per-user-namespace resource, then they
can't be shared between namespaces. We could either duplicate all the keys
and keyrings, or we could just start afresh. The latter is certainly the
easiest.
> I segragate them cleanly bc that appears to be the simplest thing to do
> especially given the use of i.e. lookup_by_name("uid.500").
Sounds reasonable.
> IMO it shouldn't be a big problem - userspace can always list keys it wants
> into a file, start a new user namespace, then re-read them out of the
> tempfile...
Not so. You aren't necessarily permitted to read a key - the read function
has to be supported by the key type for a start, and then you have to pass all
the security checks.
David
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