/usr/share/emacs/site-lisp/ is in mmm-mode 0.5.4-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/emacs/site-lisp/mmm-mode/
/usr/share/emacs/site-lisp/mmm-mode/mmm-auto.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-class.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-cmds.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-compat.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-cweb.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-defaults.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-erb.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-mason.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-mode.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-myghty.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-noweb.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-region.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-rpm.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-sample.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-univ.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-utils.el
/usr/share/emacs/site-lisp/mmm-mode/mmm-vars.el