Re: [PATCH 1/1] tpm: Don't dereference event after it's unmapped in __calc_tpm2_event_size

From: Jarkko Sakkinen
Date: Wed Jun 05 2019 - 10:37:57 EST

On Wed, Jun 05, 2019 at 12:04:33AM +0100, Chris Coulson wrote:
> The pointer to the event header is dereferenced on each loop iteration in
> order to obtain the digest count, but when called from
> tpm2_calc_event_log_size, the event header is unmapped on the first
> iteration of the loop. This results in an invalid access for on subsequent
> loop iterations for log entries that have more than one digest.
> Signed-off-by: Chris Coulson <chris.coulson@xxxxxxxxxxxxx>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>