--- linux-2.4.21/drivers/media/video/videodev.c.orig	2003-06-13 15:51:34.000000000 +0100
+++ linux-2.4.21/drivers/media/video/videodev.c	2003-07-10 23:00:49.000000000 +0100
@@ -209,7 +209,12 @@
 	unsigned int cmd, unsigned long arg)
 {
 	struct video_device *vfl = video_devdata(file);
-	int err=vfl->ioctl(vfl, cmd, (void *)arg);
+	int err;
+
+	if (!vfl)
+		return -EINVAL;
+	
+	err = vfl->ioctl(vfl, cmd, (void *)arg);
 
 	if(err!=-ENOIOCTLCMD)
 		return err;