linux-kernel - Re: [PATCH 2/2] media: uvcvideo: Avoid returning invalid controls

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Message-ID: <YabgWHPxxtFfkDqh@pendragon.ideasonboard.com>
Date:   Wed, 1 Dec 2021 04:39:20 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] media: uvcvideo: Avoid returning invalid controls

Hi Ricardo,

Thank you for the patch.

On Tue, Nov 30, 2021 at 03:50:26PM +0000, Ricardo Ribalda wrote:
> If the memory where ctrl_found is places has the value of uvc_ctrl and

s/places/placed/
s/uvc_ctrl/uvc_control/

> __uvc_find_control does not find the control we will return and invalid

s/and invalid/an invalid/

> index.

The change of this happening is small, but it exists.

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> Fixes: 6350d6a4ed487 ("media: uvcvideo: Set error_idx during ctrl_commit errors")
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
>  drivers/media/usb/uvc/uvc_ctrl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index f7b7add3cfa59..f1f6bb14fb0a6 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -1639,7 +1639,7 @@ static int uvc_ctrl_find_ctrl_idx(struct uvc_entity *entity,
>  				  struct uvc_control *uvc_control)
>  {
>  	struct uvc_control_mapping *mapping = NULL;
> -	struct uvc_control *ctrl_found;
> +	struct uvc_control *ctrl_found = NULL;
>  	unsigned int i;
>  
>  	if (!entity)

-- 
Regards,

Laurent Pinchart