linux-kernel - Re: [PATCH -next] tpm: change the return type of calc_tpm2_event_size to size

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Message-ID: <820d3cf7-03ab-5434-5306-292b41aed860@huawei.com>
Date:   Tue, 19 Feb 2019 17:15:47 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
CC:     <peterhuewe@....de>, <jgg@...pe.ca>, <arnd@...db.de>,
        <gregkh@...uxfoundation.org>, <linux-kernel@...r.kernel.org>,
        <linux-integrity@...r.kernel.org>
Subject: Re: [PATCH -next] tpm: change the return type of calc_tpm2_event_size
 to size_t

On 2019/2/19 16:59, Jarkko Sakkinen wrote:
> On Tue, Feb 19, 2019 at 03:26:18PM +0800, YueHaibing wrote:
>> calc_tpm2_event_size return size of the event which type is
>> size_t, If it is an invalid event, returns 0. And all the
>> caller use a size_t variable to check the return value, so
>> no need to convert to the return value type to int.
>>
>> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> 
> I don't see this patch make any value.

calc_tpm2_event_size return size_t 'size' which derive from u32 'event_field->event_size',

convert it to int may result in truncation.

> 
> /Jarkko
> 
> .
>