linux-kernel - Re: [PATCH 3/4] i2c: xlp9xx: Make sure the transfer size is not more than I2C_SMBUS_BLOCK

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Message-ID: <20180522120841.xtyw7g7s6rgcncbk@ninjato>
Date:   Tue, 22 May 2018 14:08:41 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     George Cherian <george.cherian@...ium.com>
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        jglauber@...ium.com, kamlakant.patel@...ium.com,
        mchehab+samsung@...nel.org, davem@...emloft.net,
        gregkh@...uxfoundation.org, akpm@...ux-foundation.org,
        linus.walleij@...aro.org, rdunlap@...radead.org,
        Jayachandran C <jnair@...iumnetworks.com>
Subject: Re: [PATCH 3/4] i2c: xlp9xx: Make sure the transfer size is not more
 than I2C_SMBUS_BLOCK_SIZE

On Wed, May 16, 2018 at 12:00:18AM -0700, George Cherian wrote:
> For SMBus transactions the max permissible transfer size is
> I2C_SMBUS_BLOCK_SIZE. It is possible that some clients might
> not follow it strictly occasionally.
> This would lead to stack corruption if the driver copies more than
> I2C_SMBUS_BLOCK_SIZE bytes. Add a check to avoid such conditions.
> 
> Signed-off-by: Jayachandran C <jnair@...iumnetworks.com>
> Signed-off-by: George Cherian <george.cherian@...ium.com>

Applied to for-next, thanks!


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