linux-kernel - Re: [PATCH] iio: adc: ads124: avoid buffer overflow

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Date:   Mon, 1 Apr 2019 07:41:37 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Vincent Stehlé <vincent.stehle@...oste.net>,
        <linux-iio@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH] iio: adc: ads124: avoid buffer overflow

On 3/31/19 1:54 PM, Vincent Stehlé wrote:
> When initializing the priv->data array starting from index 1, there is one
> less element to consider than when initializing the full array.
> 
> Fixes: e717f8c6dfec8f76 ("iio: adc: Add the TI ads124s08 ADC code")
> Signed-off-by: Vincent Stehlé <vincent.stehle@...oste.net>
> Cc: Dan Murphy <dmurphy@...com>
> Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> ---
>  drivers/iio/adc/ti-ads124s08.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/adc/ti-ads124s08.c b/drivers/iio/adc/ti-ads124s08.c
> index 53f17e4f2f230..552c2be8d87ad 100644
> --- a/drivers/iio/adc/ti-ads124s08.c
> +++ b/drivers/iio/adc/ti-ads124s08.c
> @@ -202,7 +202,7 @@ static int ads124s_read(struct iio_dev *indio_dev, unsigned int chan)
>  	};
>  
>  	priv->data[0] = ADS124S08_CMD_RDATA;
> -	memset(&priv->data[1], ADS124S08_CMD_NOP, sizeof(priv->data));
> +	memset(&priv->data[1], ADS124S08_CMD_NOP, sizeof(priv->data) - 1);
>  
>  	ret = spi_sync_transfer(priv->spi, t, ARRAY_SIZE(t));
>  	if (ret < 0)
> 

Reviewed-by: Dan Murphy <dmurphy@...com>
-- 
------------------
Dan Murphy