libcamera: camera: Check requests before queueing them

Make sure all requests queued to a camera only contain streams which
have been configured and belong to the camera.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/camera.cpp

@@ -732,6 +732,7 @@ Request *Camera::createRequest()
  * \return 0 on success or a negative error code otherwise
  * \retval -ENODEV The camera has been disconnected from the system
  * \retval -EACCES The camera is not running so requests can't be queued
+ * \retval -EINVAL The request is invalid
  */
 int Camera::queueRequest(Request *request)
 {
@@ -741,6 +742,14 @@ int Camera::queueRequest(Request *request)
 	if (!stateIs(CameraRunning))
 		return -EACCES;
 
+	for (auto const &it : request->buffers()) {
+		Stream *stream = it.first;
+		if (activeStreams_.find(stream) == activeStreams_.end()) {
+			LOG(Camera, Error) << "Invalid request";
+			return -EINVAL;
+		}
+	}
+
 	int ret = request->prepare();
 	if (ret) {
 		LOG(Camera, Error) << "Failed to prepare request";