rocket: don't let random users reset the controller

Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/char/rocket.c

@@ -1399,6 +1399,9 @@ static int reset_rm2(struct r_port *info, void __user *arg)
 {
 	int reset;
 
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	if (copy_from_user(&reset, arg, sizeof (int)))
 		return -EFAULT;
 	if (reset)