--- linux-2.6.0-test6/drivers/cdrom/sonycd535.c.orig	2003-10-06 10:46:56.000000000 -0300
+++ linux-2.6.0-test6/drivers/cdrom/sonycd535.c	2003-10-06 10:48:20.000000000 -0300
@@ -1158,7 +1158,8 @@
 			return err;
 		spin_up_drive(status);
 		set_drive_mode(SONY535_AUDIO_DRIVE_MODE, status);
-		copy_from_user(params, (void *)arg, 6);
+		if (copy_from_user(params, (void *)arg, 6))
+			return -EFAULT;
 
 		/* The parameters are given in int, must be converted */
 		for (i = 0; i < 3; i++) {