[PATCH v15 17/19] media: uvcvideo: Add sanity check to uvc_ioctl_xu_ctrl_map

[Ricardo Ribalda]

Do not process unknown data types.

Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
 drivers/media/usb/uvc/uvc_v4l2.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 5000c74271e0..4c88dab15554 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -106,6 +106,12 @@ static int uvc_ioctl_xu_ctrl_map(struct uvc_video_chain *chain,
 	struct uvc_control_mapping *map;
 	int ret;
 
+	if (xmap->data_type > UVC_CTRL_DATA_TYPE_BITMASK) {
+		uvc_dbg(chain->dev, CONTROL,
+			"Unsupported UVC data type %u\n", xmap->data_type);
+		return -ENOTTY;
+	}
+
 	map = kzalloc(sizeof(*map), GFP_KERNEL);
 	if (map == NULL)
 		return -ENOMEM;

-- 
2.47.0.338.g60cca15819-goog