[patch] [media] media: info leak in __media_device_enum_links()

[Dan Carpenter <dan.carpenter@oracle.com>]

These structs have holes and reserved struct members which aren't
cleared.  I've added a memset() so we don't leak stack information.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 99b80b6..450c0d1 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -139,6 +139,8 @@ static long __media_device_enum_links(struct media_device *mdev,
 
 		for (p = 0; p < entity->num_pads; p++) {
 			struct media_pad_desc pad;
+
+			memset(&pad, 0, sizeof(pad));
 			media_device_kpad_to_upad(&entity->pads[p], &pad);
 			if (copy_to_user(&links->pads[p], &pad, sizeof(pad)))
 				return -EFAULT;
@@ -156,6 +158,7 @@ static long __media_device_enum_links(struct media_device *mdev,
 			if (entity->links[l].source->entity != entity)
 				continue;
 
+			memset(&link, 0, sizeof(link));
 			media_device_kpad_to_upad(entity->links[l].source,
 						  &link.source);
 			media_device_kpad_to_upad(entity->links[l].sink,