[media] media: info leak in __media_device_enum_links()

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>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 1957c0df08fd..d5a7a135f75d 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -142,6 +142,8 @@ 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;
@@ -159,6 +161,7 @@ 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,