linux-kernel - Re: [PATCH v4] KEYS: trusted: correctly initialize digests and fix locking issue

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Message-ID: <20190914130441.GE9560@linux.intel.com>
Date:   Sat, 14 Sep 2019 14:04:41 +0100
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Roberto Sassu <roberto.sassu@...wei.com>
Cc:     zohar@...ux.ibm.com, jsnitsel@...hat.com,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org, silviu.vlasceanu@...wei.com
Subject: Re: [PATCH v4] KEYS: trusted: correctly initialize digests and fix
 locking issue

On Fri, Sep 13, 2019 at 08:51:36PM +0200, Roberto Sassu wrote:
> Commit 0b6cf6b97b7e ("tpm: pass an array of tpm_extend_digest structures to
> tpm_pcr_extend()") modifies tpm_pcr_extend() to accept a digest for each
> PCR bank. After modification, tpm_pcr_extend() expects that digests are
> passed in the same order as the algorithms set in chip->allocated_banks.
> 
> This patch fixes two issues introduced in the last iterations of the patch
> set: missing initialization of the TPM algorithm ID in the tpm_digest
> structures passed to tpm_pcr_extend() by the trusted key module, and
> unreleased locks in the TPM driver due to returning from tpm_pcr_extend()
> without calling tpm_put_ops().
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
> Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>
> Fixes: 0b6cf6b97b7e ("tpm: pass an array of tpm_extend_digest structures to tpm_pcr_extend()")

Reviewed-by:  <jarkko.sakkinen@...ux.intel.com>

I picked up this patch to my tree.

/Jarkko