[PATCH] janitor: Audit copy_to_user (ttusb)

From: Daniele <bellucda@tiscali.it>

- Audit copy_to_user in drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c

drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c

@@ -1055,7 +1055,8 @@ static ssize_t stc_read(struct file *file, char *buf, size_t count,
 	if (tc < 0)
 		return 0;
 
-	copy_to_user(buf, stc_firmware + *offset, tc);
+	if (copy_to_user(buf, stc_firmware + *offset, tc))
+		return -EFAULT;
 
 	*offset += tc;