From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: linux-integrity@vger.kernel.org
Cc: Mimi Zohar <zohar@linux.ibm.com>,
Jerry Snitselaar <jsnitsel@redhat.com>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Sumit Garg <sumit.garg@linaro.org>,
Stefan Berger <stefanb@linux.vnet.ibm.com>,
Peter Huewe <peterhuewe@gmx.de>, Jason Gunthorpe <jgg@ziepe.ca>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tpm: Detach page allocation from tpm_buf
Date: Thu, 26 Sep 2019 16:12:27 +0300 [thread overview]
Message-ID: <20190926131227.GA6582@linux.intel.com> (raw)
In-Reply-To: <20190926124635.GA6040@linux.intel.com>
On Thu, Sep 26, 2019 at 03:46:35PM +0300, Jarkko Sakkinen wrote:
> On Wed, Sep 25, 2019 at 04:48:41PM +0300, Jarkko Sakkinen wrote:
> > - tpm_buf_reset(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_GET_RANDOM);
> > + tpm_buf_reset(&buf, data_ptr, PAGE_SIZE,
> > + TPM2_ST_NO_SESSIONS, TPM2_CC_PCR_EXTEND);
>
> Oops.
Maybe we could use random as the probe for TPM version since we anyway
send a TPM command as a probe for TPM version:
1. Try TPM2 get random.
2. If fail, try TPM1 get random.
3. Output random number to klog.
Something like 8 bytes would be sufficient. This would make sure that
no new change breaks tpm_get_random() and also this would give some
feedback that TPM is at least somewhat working.
/Jarkko
next prev parent reply other threads:[~2019-09-26 13:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-25 13:48 [PATCH] tpm: Detach page allocation from tpm_buf Jarkko Sakkinen
2019-09-25 14:03 ` James Bottomley
2019-09-27 13:06 ` Jarkko Sakkinen
2019-10-02 12:41 ` Mimi Zohar
2019-10-03 11:35 ` Jarkko Sakkinen
2019-10-03 12:50 ` Mimi Zohar
2019-10-03 18:26 ` Jarkko Sakkinen
2019-09-26 12:46 ` Jarkko Sakkinen
2019-09-26 13:12 ` Jarkko Sakkinen [this message]
2019-10-02 12:40 ` Mimi Zohar
2019-10-03 11:32 ` Jarkko Sakkinen
2019-10-03 11:33 ` Jarkko Sakkinen
2019-10-03 15:24 ` Mimi Zohar
2019-10-03 18:33 ` Jarkko Sakkinen
2019-10-03 12:39 ` Mimi Zohar
2019-10-03 18:31 ` Jarkko Sakkinen
2019-09-26 17:23 Jarkko Sakkinen
2019-09-27 15:42 ` Jarkko Sakkinen
2019-09-28 7:58 ` Jerry Snitselaar
2019-10-01 20:51 ` Jarkko Sakkinen
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