discover-image: extend r/o check on images via path

If we have no path, let's check the parent's path.

diff --git a/src/shared/discover-image.c b/src/shared/discover-image.c
index 82e0ad4c027238ac0a384ab6a4fcd1cf0b40f423..82be0b73d8aa8cb26ce16de7c889873284c872aa 100644 (file)
--- a/src/shared/discover-image.c
+++ b/src/shared/discover-image.c
@@ -356,6 +356,7 @@ static int image_make(
 
         read_only =
                 (path && path_startswith(path, "/usr")) ||
+                (parent && path_startswith(parent, "/usr")) ||
                 (faccessat(dfd, filename, W_OK, AT_EACCESS) < 0 && errno == EROFS);
 
         if (S_ISDIR(st->st_mode)) {