The 'scan' local struct is used to push data to user space from a
triggered buffer, but it does not set values for inactive channels, as
it only uses iio_for_each_active_channel() to assign new values.

Initialize the struct to zero before using it to avoid pushing
uninitialized information to userspace.

Cc: stable@vger.kernel.org
Fixes: eab35358aae7 ("iio: light: ROHM BH1745 colour sensor")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 drivers/iio/light/bh1745.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/light/bh1745.c b/drivers/iio/light/bh1745.c
index 23e9f16090cc..2ffc839c7501 100644
--- a/drivers/iio/light/bh1745.c
+++ b/drivers/iio/light/bh1745.c
@@ -746,6 +746,8 @@ static irqreturn_t bh1745_trigger_handler(int interrupt, void *p)
 	int i;
 	int j = 0;
 
+	memset(&scan, 0, sizeof(scan));
+
 	iio_for_each_active_channel(indio_dev, i) {
 		ret = regmap_bulk_read(data->regmap, BH1745_RED_LSB + 2 * i,
 				       &value, 2);

-- 
2.43.0

On Mon, 25 Nov 2024 22:16:15 +0100
Javier Carrasco <javier.carrasco.cruz@gmail.com> wrote:

> The 'scan' local struct is used to push data to user space from a
> triggered buffer, but it does not set values for inactive channels, as
> it only uses iio_for_each_active_channel() to assign new values.
> 
> Initialize the struct to zero before using it to avoid pushing
> uninitialized information to userspace.
> 
> Cc: stable@vger.kernel.org
> Fixes: eab35358aae7 ("iio: light: ROHM BH1745 colour sensor")
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Applied.
> ---
>  drivers/iio/light/bh1745.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/iio/light/bh1745.c b/drivers/iio/light/bh1745.c
> index 23e9f16090cc..2ffc839c7501 100644
> --- a/drivers/iio/light/bh1745.c
> +++ b/drivers/iio/light/bh1745.c
> @@ -746,6 +746,8 @@ static irqreturn_t bh1745_trigger_handler(int interrupt, void *p)
>  	int i;
>  	int j = 0;
>  
> +	memset(&scan, 0, sizeof(scan));
> +
>  	iio_for_each_active_channel(indio_dev, i) {
>  		ret = regmap_bulk_read(data->regmap, BH1745_RED_LSB + 2 * i,
>  				       &value, 2);
>