linux-kernel - Re: [PATCH 1/2] tpm: Unify the send callback behaviour

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Date:   Fri, 8 Feb 2019 11:19:04 -0500
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        Peter Huewe <PeterHuewe@....de>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Stefan Berger <stefanb@...ux.vnet.ibm.com>,
        Nayna Jain <nayna@...ux.ibm.com>, stable@...r.kernel.org
Subject: Re: [PATCH 1/2] tpm: Unify the send callback behaviour

On 2/8/19 11:07 AM, Jarkko Sakkinen wrote:
> On Fri, Feb 08, 2019 at 10:45:53AM -0500, Stefan Berger wrote:
>> On 2/8/19 10:42 AM, Jarkko Sakkinen wrote:
>>> On Fri, Feb 08, 2019 at 09:42:16AM -0500, Stefan Berger wrote: > On 2/8/19 9:05 AM, Jarkko Sakkinen wrote:
>>>> At least tpm_nsc_send (tpm_nsc.c) and tpm_inf_send (tpm_infineon.c) are also
>>>> returning the number of bytes sent. I would consider tpm_crb the outlier
>>>> that returns 0 and should return the length even though we don't need it...
>>> That would be absolutely wrong way the fix the *actual* issue i.e.
>>> callbacks returning garbage (sometimes just passing the length parameter
>>> back as a return value).
>> Then I guess you have to fixes those other two files as well...
> That's still a better option.

tpm_tis_core.c's tpm_tis_send_main() also needs fixing...


>
> /Jarkko
>