[PATCH v8 08/17] tpm: call tpm2_flush_space() on error in tpm_try_transmit()

[Sasha Levin]

On Fri, Nov 16, 2018 at 02:38:32PM +0200, Jarkko Sakkinen wrote:
>Always call tpm2_flush_space() on failure in tpm_try_transmit() so that
>the volatile memory of the TPM gets cleared. If /dev/tpm0 does not have
>sufficient permissions (usually it has), this could lead to the leakage
>of TPM objects. Through /dev/tpmrm0 this issue does not raise any new
>security concerns.
>
>Cc: James Bottomley <James.Bottomley at HansenPartnership.com>
>Cc: stable at vger.kernel.org
>Fixes: 745b361e989a ("tpm:tpm: infrastructure for TPM spaces")
>Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen at linux.intel.com>
>Reviewed-by: Stefan Berger <stefanb at linux.ibm.com>

Hi Jarkko,

This patch seems to depend on previous patches in this series, but those
were not tagged for stable. Do they also need to be backported? If so,
can you tag them as such?

--
Thanks,
Sasha