linux-kernel - Re: [PATCH 02/11] iio: adc: ti-ads1119: fix information leak in triggered buffer

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Message-ID: <20241130210010.1b9c7bed@jic23-huawei>
Date: Sat, 30 Nov 2024 21:00:16 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Javier Carrasco <javier.carrasco.cruz@...il.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>, Antoni Pokusinski
 <apokusinski01@...il.com>, Francesco Dolcini <francesco@...cini.it>,
 João Paulo Gonçalves
 <jpaulo.silvagoncalves@...il.com>, Gregor Boirie
 <gregor.boirie@...rot.com>, Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, João Paulo Gonçalves
 <joao.goncalves@...adex.com>, Francesco Dolcini
 <francesco.dolcini@...adex.com>, stable@...r.kernel.org
Subject: Re: [PATCH 02/11] iio: adc: ti-ads1119: fix information leak in
 triggered buffer

On Mon, 25 Nov 2024 22:16:10 +0100
Javier Carrasco <javier.carrasco.cruz@...il.com> wrote:

> The 'scan' local struct is used to push data to user space from a
> triggered buffer, but it has a hole between the sample (unsigned int)
> and the timestamp. This hole is never initialized.
> 
> Initialize the struct to zero before using it to avoid pushing
> uninitialized information to userspace.
> 
> Cc: stable@...r.kernel.org
> Fixes: a9306887eba4 ("iio: adc: ti-ads1119: Add driver")
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
Applied.
> ---
>  drivers/iio/adc/ti-ads1119.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/iio/adc/ti-ads1119.c b/drivers/iio/adc/ti-ads1119.c
> index e9d9d4d46d38..2615a275acb3 100644
> --- a/drivers/iio/adc/ti-ads1119.c
> +++ b/drivers/iio/adc/ti-ads1119.c
> @@ -506,6 +506,8 @@ static irqreturn_t ads1119_trigger_handler(int irq, void *private)
>  	unsigned int index;
>  	int ret;
>  
> +	memset(&scan, 0, sizeof(scan));
> +
>  	if (!iio_trigger_using_own(indio_dev)) {
>  		index = find_first_bit(indio_dev->active_scan_mask,
>  				       iio_get_masklength(indio_dev));
>