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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Roberto Sassu <roberto.sassu@huawei.com>
Cc: zohar@linux.ibm.com, david.safford@ge.com, monty.wiseman@ge.com,
	linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org, silviu.vlasceanu@huawei.com,
	stable@vger.kernel.org
Subject: Re: [PATCH v5 6/7] tpm: ensure that the output of PCR read contains the correct digest size
Date: Sun, 18 Nov 2018 09:32:07 +0200	[thread overview]
Message-ID: <20181118073207.GC5897@linux.intel.com> (raw)
In-Reply-To: <05c7c936-da58-f386-0a43-69e96d6e18a8@huawei.com>

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@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

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.

/Jarkko

  reply	other threads:[~2018-11-18  7:32 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-14 15:31 [PATCH v5 0/7] tpm: retrieve digest size of unknown algorithms from TPM Roberto Sassu
2018-11-14 15:31 ` [PATCH v5 1/7] tpm: dynamically allocate the allocated_banks array Roberto Sassu
2018-11-16 13:36   ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 2/7] tpm: remove definition of TPM2_ACTIVE_PCR_BANKS Roberto Sassu
2018-11-16 13:38   ` Jarkko Sakkinen
2018-11-28  7:50     ` Roberto Sassu
2018-11-28 12:17     ` Roberto Sassu
2018-11-29 12:04       ` Roberto Sassu
2018-11-30 19:41         ` Jarkko Sakkinen
2018-11-30 19:45           ` Jarkko Sakkinen
2018-11-30 22:18             ` Jarkko Sakkinen
2018-12-03  9:59             ` Roberto Sassu
2018-12-03 17:31               ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 3/7] tpm: rename and export tpm2_digest and tpm2_algorithms Roberto Sassu
2018-11-14 15:31 ` [PATCH v5 4/7] tpm: modify tpm_pcr_read() definition to pass a TPM hash algorithm Roberto Sassu
2018-11-16 13:41   ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 5/7] tpm: retrieve digest size of unknown algorithms with PCR read Roberto Sassu
2018-11-14 15:31 ` [PATCH v5 6/7] tpm: ensure that the output of PCR read contains the correct digest size Roberto Sassu
2018-11-16 13:41   ` Jarkko Sakkinen
2018-11-16 16:06     ` Roberto Sassu
2018-11-18  7:32       ` Jarkko Sakkinen [this message]
2018-11-19  8:14         ` Roberto Sassu
2018-11-19 14:33           ` Jarkko Sakkinen
2018-11-19 15:09             ` Roberto Sassu
2018-11-19 16:07               ` Jarkko Sakkinen
2018-11-28  8:40                 ` Roberto Sassu
2018-11-28 19:19                   ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 7/7] tpm: pass an array of tpm_bank_list structures to tpm_pcr_extend() Roberto Sassu
2018-11-16 15:03   ` Jarkko Sakkinen
2018-11-16 15:55     ` Roberto Sassu
2018-11-18  7:27       ` Jarkko Sakkinen
2018-11-19  4:57         ` Mimi Zohar
2018-11-19  8:16           ` Roberto Sassu
2018-11-19 14:33             ` Mimi Zohar
2018-11-19 14:39             ` Jarkko Sakkinen
2018-11-18  7:29       ` Jarkko Sakkinen
2018-11-19  8:22         ` Roberto Sassu
2018-11-19 14:42           ` Jarkko Sakkinen

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