/usr/share/doc/libblockdev2/changelog.Debian.gz is in libblockdev2 2.16-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libblockdev2/../libblockdev-utils2/changelog.Debian.gz
/usr/share/doc/libblockdev2/../libblockdev-utils2/changelog.Debian.gz