On Mon, Nov 19, 2018 at 09:14:00AM +0100, Roberto Sassu wrote: > On 11/18/2018 8:32 AM, Jarkko Sakkinen wrote: > > On Fri, Nov 16, 2018 at 05:06:48PM +0100, Roberto Sassu wrote: > > > On 11/16/2018 2:41 PM, Jarkko Sakkinen wrote: > > > > On Wed, Nov 14, 2018 at 04:31:07PM +0100, Roberto Sassu wrote: > > > > > This patch protects against data corruption that could happen in the bus, > > > > > by checking that that the digest size returned by the TPM during a PCR read > > > > > matches the size of the algorithm passed to tpm2_pcr_read(). > > > > > > > > > > This check is performed after information about the PCR banks has been > > > > > retrieved. > > > > > > > > > > Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx> > > > > > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> > > > > > Cc: stable@xxxxxxxxxxxxxxx > > > > > > > > Missing fixes tag. > > > > > > Before this patch set, tpm2_pcr_extend() always copied 20 bytes from the > > > output sent by the TPM. > > > > > > Roberto > > > > Aah, right, of course. Well the patch set is ATM somewhat broken because > > this would require a fixes tag that points to a patch insdie the patch > > set. > > > > Probably good way to fix the issue is to just merge this with the > > earlier commit. > > Unfortunately, it is not possible. The exact digest size has been > introduced with patch 5/7. I put this in simple terms: if I merge 5/7 the driver will be broken. Any commit in the patch set should not leave the tree in broken state. That implies that 5/7 and 6/7 cannot be separate commits. /Jarkko
