linux-kernel - Re: [PATCH] KEYS: trusted: allow module init if TPM is inactive or deactivated

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Message-ID: <e50c4cfa-1f0c-6f4d-1910-010a8d874393@huawei.com>
Date:   Fri, 2 Aug 2019 10:21:16 +0200
From:   Roberto Sassu <roberto.sassu@...wei.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
CC:     <jejb@...ux.ibm.com>, <zohar@...ux.ibm.com>, <jgg@...pe.ca>,
        <linux-integrity@...r.kernel.org>,
        <linux-security-module@...r.kernel.org>,
        <keyrings@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <crazyt2019+lml@...il.com>, <tyhicks@...onical.com>,
        <nayna@...ux.vnet.ibm.com>, <silviu.vlasceanu@...wei.com>
Subject: Re: [PATCH] KEYS: trusted: allow module init if TPM is inactive or
 deactivated

On 8/1/2019 6:32 PM, Jarkko Sakkinen wrote:
> On Mon, Jul 15, 2019 at 06:44:28PM +0200, Roberto Sassu wrote:
>> According to the bug report at https://bugs.archlinux.org/task/62678,
>> the trusted module is a dependency of the ecryptfs module. We should
>> load the trusted module even if the TPM is inactive or deactivated.
>>
>> Given that commit 782779b60faa ("tpm: Actually fail on TPM errors during
>> "get random"") changes the return code of tpm_get_random(), the patch
>> should be modified to ignore the -EIO error. I will send a new version.
> 
> Do you have information where this dependency comes from?

ecryptfs retrieves the encryption key from encrypted keys (see
ecryptfs_get_encrypted_key()).

Roberto

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