Re: [PATCH] media: imx: fix a potential memory leak in imx_media_csc_scaler_device_init()

[Dan Carpenter <dan.carpenter@linaro.org>]

On Wed, Feb 26, 2025 at 10:21:26PM +0800, Haoxiang Li wrote:
> Add video_device_release() in label 'err_m2m' to release the memory
> allocated by video_device_alloc() and prevent potential memory leaks.
> 
> Fixes: a8ef0488cc59 ("media: imx: add csc/scaler mem2mem device")
> Cc: stable@vger.kernel.org
> Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
> ---
>  drivers/staging/media/imx/imx-media-csc-scaler.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/media/imx/imx-media-csc-scaler.c b/drivers/staging/media/imx/imx-media-csc-scaler.c
> index e5e08c6f79f2..f99c88e87a94 100644
> --- a/drivers/staging/media/imx/imx-media-csc-scaler.c
> +++ b/drivers/staging/media/imx/imx-media-csc-scaler.c
> @@ -913,6 +913,7 @@ imx_media_csc_scaler_device_init(struct imx_media_dev *md)
>  
>  err_m2m:
>  	video_set_drvdata(vfd, NULL);
> +	video_device_release(vfd);

The video_set_drvdata() call is pointless.  It just does:

	vfd.dev->driver_data = NULL;

but that's not necessary if we're just going to free "vfd" on the next
line.

regards,
dan carpenter

>  err_vfd:
>  	kfree(priv);
>  	return ERR_PTR(ret);