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

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Message-ID: <20190407130242.6699b510@archlinux>
Date:   Sun, 7 Apr 2019 13:02:42 +0100
From:   Jonathan Cameron <jic23@...23.retrosnub.co.uk>
To:     Dan Murphy <dmurphy@...com>
Cc:     Vincent Stehlé <vincent.stehle@...oste.net>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH] iio: adc: ads124: avoid buffer overflow

On Mon, 1 Apr 2019 07:41:37 -0500
Dan Murphy <dmurphy@...com> wrote:

> 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>

Applied to the fixes-togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it.

Thanks,

Jonathan