linux-kernel - Re: [PATCH 1/1] spi: imx: fix issue when tx_buf or rx

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Message-ID: <1495102114.26925.20.camel@nxp.com>
Date:   Thu, 18 May 2017 13:08:34 +0300
From:   Leonard Crestez <leonard.crestez@....com>
To:     <jiada_wang@...tor.com>, <broonie@...nel.org>
CC:     <linux-spi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] spi: imx: fix issue when tx_buf or rx_buf is NULL

On Thu, 2017-05-18 at 03:01 -0700, jiada_wang@...tor.com wrote:
> From: Jiada Wang <jiada_wang@...tor.com>
> 
> In case either transfer->tx_buf or transfer->rx_buf is NULL,
> manipulation of buffer in spi_imx_u32_swap_u[8|16]() will cause
> NULL pointer dereference crash.
> 
> Add buffer check at very beginning of spi_imx_u32_swap_u[8|16](),
> to avoid such crash.
> 
> Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
> Reported-by: Leonard Crestez <leonard.crestez@....com>

Tested-by: Leonard Crestez <leonard.crestez@....com>