AppArmor: Fix the error case for chroot relative path name lookup

When a chroot relative pathname lookup fails it is falling through to
do a d_absolute_path lookup.  This is incorrect as d_absolute_path should
only be used to lookup names for namespace absolute paths.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Kees Cook <kees@ubuntu.com>

security/apparmor/path.c

@@ -91,9 +91,8 @@ static int d_namespace_path(struct path *path, char *buf, int buflen,
 		}
 		path_put(&root);
 		connected = 0;
-	}
-
-	res = d_absolute_path(path, buf, buflen);
+	} else
+		res = d_absolute_path(path, buf, buflen);
 
 	*name = res;
 	/* handle error conditions - and still allow a partial path to