/usr/share/doc/liboss4-salsa-asound2/changelog.Debian.gz is in liboss4-salsa-asound2 4.2-build2010-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/liboss4-salsa-asound2/../liboss4-salsa2/changelog.Debian.gz