Re: [tpmdd-devel] [PATCH v2 1/2] tpm2: add session handle context saving and restoring to the space code

Jarkko Sakkinen
2017-01-30T21:46:51Z

On Sun, Jan 29, 2017 at 07:35:32PM -0500, Ken Goldman wrote:
> On 1/27/2017 7:32 PM, James Bottomley wrote:
> >
> > Sessions are also isolated during each instance of a tpm space. This
> > means that spaces shouldn't be able to see each other's sessions and
> > is enforced by ensuring that a space user may only refer to sessions
> > handles that are present in their own chip->session_tbl. Finally when
> > a space is closed, all the sessions belonging to it should be flushed
> > so the handles may be re-used by other spaces.
>
> This should be true for transient objects as well.

Transient objects do not need anything special. All transient objects
are flushed after command-response so you implicitly get the isolation.

/Jarkko