linux-kernel - Re: [PATCH 2/2] tpm/eventlog/tpm1: Fix off-by-1 when reading binary_bios

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Message-ID: <20190116221729.GI25803@linux.intel.com>
Date:   Thu, 17 Jan 2019 00:17:29 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jia Zhang <zhang.jia@...ux.alibaba.com>, nayna@...ux.ibm.com
Cc:     peterhuewe@....de, jgg@...pe.ca, tweek@...gle.com,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] tpm/eventlog/tpm1: Fix off-by-1 when reading
 binary_bios_measurements

On Fri, Jan 11, 2019 at 04:59:33PM +0800, Jia Zhang wrote:
> It is unable to read the entry when it is the only one in
> binary_bios_measurements:
> 
> 00000000  00 00 00 00 08 00 00 00  c4 2f ed ad 26 82 00 cb
> 00000010  1d 15 f9 78 41 c3 44 e7  9d ae 33 20 00 00 00 00
> 00000020
> 
> This is obviously a firmware problem on my linux machine:
> 
> 	Manufacturer: Inspur
> 	Product Name: SA5212M4
> 	Version: 01
> 
> However, binary_bios_measurements should return it any way,
> rather than nothing, after all its content is completely
> valid.
> 
> Fixes: 55a82ab("tpm: add bios measurement log")
> Signed-off-by: Jia Zhang <zhang.jia@...ux.alibaba.com>

LGTM, Nayna?

/Jarkko