Re: [PATCH] iio: adc: ads124: avoid buffer overflow

[Mukesh Ojha <mojha@codeaurora.org>]

On 4/1/2019 12:24 AM, 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@laposte.net>
> Cc: Dan Murphy <dmurphy@ti.com>
> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>


Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>

Cheers,
-Mukesh

> ---
>   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)