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SubjectRe: [PATCH 1/4] integrity: TPM internel kernel interface
On Mon, Aug 11, 2008 at 05:13:51PM -0400, Mimi Zohar wrote:
>
> I assume the concern here is that between looking up the chip and actually
>
> using the chip, the TPM chip is disabled/deactivated. Based on
> discussions
> with Kenneth Goldman, the TCG main specification part2: structures,
> require
> that even if the TPM is disabled/deactivated, the command to extend the
> PCR
> will succeed, but the command to read the PCR will fail with an
> appropriate
> error code.

And what happens when the chip simply goes away due to a hotplug action?
Or not even the actual chip goes away but just the chip driver and you
now dereference freed memory?



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