Messages in this thread | | | Subject | Re: [PATCH v5 6/7] tpm: ensure that the output of PCR read contains the correct digest size | From | Roberto Sassu <> | Date | Fri, 16 Nov 2018 17:06:48 +0100 |
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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@huawei.com> >> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> >> Cc: stable@vger.kernel.org > > Missing fixes tag.
Before this patch set, tpm2_pcr_extend() always copied 20 bytes from the output sent by the TPM.
Roberto
> /Jarkko >
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