/usr/share/java/geronimo-stax-1.0-spec.jar is in libgeronimo-stax-1.0-spec-java 1.0.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/geronimo-stax-1.0-spec-1.0.1.jar
/usr/share/java/geronimo-stax-1.0-spec-1.0.1.jar