/usr/ is in libghc-sendfile-doc 0.7.9-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libghc-sendfile-doc/html/src/
/usr/lib/
/usr/lib/ghc-doc/
/usr/lib/ghc-doc/haddock/
/usr/lib/ghc-doc/haddock/sendfile-0.7.9/
/usr/lib/ghc-doc/haddock/sendfile-0.7.9/sendfile.haddock
/usr/lib/ghc-doc/hoogle/
/usr/share/
/usr/share/doc/
/usr/share/doc/libghc-sendfile-doc/
/usr/share/doc/libghc-sendfile-doc/copyright
/usr/share/doc/libghc-sendfile-doc/html/
/usr/share/doc/libghc-sendfile-doc/html/haddock-util.js
/usr/share/doc/libghc-sendfile-doc/html/Network-Socket-SendFile.html
/usr/share/doc/libghc-sendfile-doc/html/doc-index.html
/usr/share/doc/libghc-sendfile-doc/html/index.html
/usr/share/doc/libghc-sendfile-doc/html/ocean.css
/usr/share/doc/libghc-sendfile-doc/html/index-frames.html
/usr/share/doc/libghc-sendfile-doc/html/Network-Socket-SendFile-Handle.html
/usr/share/doc/libghc-sendfile-doc/html/plus.gif
/usr/share/doc/libghc-sendfile-doc/html/frames.html
/usr/share/doc/libghc-sendfile-doc/html/sendfile.txt
/usr/share/doc/libghc-sendfile-doc/html/synopsis.png
/usr/share/doc/libghc-sendfile-doc/html/hslogo-16.png
/usr/share/doc/libghc-sendfile-doc/html/mini_Network-Socket-SendFile-Handle.html
/usr/share/doc/libghc-sendfile-doc/html/mini_Network-Socket-SendFile-Portable.html
/usr/share/doc/libghc-sendfile-doc/html/Network-Socket-SendFile-Iter.html
/usr/share/doc/libghc-sendfile-doc/html/Network-Socket-SendFile-Portable.html
/usr/share/doc/libghc-sendfile-doc/html/minus.gif
/usr/share/doc/libghc-sendfile-doc/html/src/Network-Socket-SendFile-Linux.html
/usr/share/doc/libghc-sendfile-doc/html/src/Network-Socket-SendFile.html
/usr/share/doc/libghc-sendfile-doc/html/src/hscolour.css
/usr/share/doc/libghc-sendfile-doc/html/src/Network-Socket-SendFile-Handle.html
/usr/share/doc/libghc-sendfile-doc/html/src/Network-Socket-SendFile-Internal.html
/usr/share/doc/libghc-sendfile-doc/html/src/Network-Socket-SendFile-Util.html
/usr/share/doc/libghc-sendfile-doc/html/src/Network-Socket-SendFile-Iter.html
/usr/share/doc/libghc-sendfile-doc/html/src/Network-Socket-SendFile-Portable.html
/usr/share/doc/libghc-sendfile-doc/html/mini_Network-Socket-SendFile-Iter.html
/usr/share/doc/libghc-sendfile-doc/html/mini_Network-Socket-SendFile.html
/usr/share/doc/libghc-sendfile-doc/changelog.Debian.gz
/usr/lib/ghc-doc/hoogle/sendfile.txt