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

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Date:   Mon, 1 Apr 2019 14:02:34 +0530
From:   Mukesh Ojha <mojha@...eaurora.org>
To:     Vincent Stehlé <vincent.stehle@...oste.net>,
        linux-iio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Dan Murphy <dmurphy@...com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH] iio: adc: ads124: avoid buffer overflow


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@...oste.net>
> Cc: Dan Murphy <dmurphy@...com>
> Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>


Reviewed-by: Mukesh Ojha <mojha@...eaurora.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)