/lib/modules/3.16.0-57-generic/vdso/ is in linux-image-3.16.0-57-generic 3.16.0-57.77~14.04.1.
This file is owned by root:root, with mode 0o755.
..
/lib/modules/3.16.0-57-generic/vdso/.build-id/
/lib/modules/3.16.0-57-generic/vdso/.build-id/79/
/lib/modules/3.16.0-57-generic/vdso/.build-id/79/0eb21b313979e3429ae82b721ae4eae22d2768.debug
/lib/modules/3.16.0-57-generic/vdso/.build-id/a5/
/lib/modules/3.16.0-57-generic/vdso/.build-id/a5/1bd724305ffd704e9d64dcfab577da6d6715b8.debug
/lib/modules/3.16.0-57-generic/vdso/.build-id/be/
/lib/modules/3.16.0-57-generic/vdso/.build-id/be/5d82bf2890f09b1b0c48541cc2703888953e4a.debug
/lib/modules/3.16.0-57-generic/vdso/.build-id/cf/
/lib/modules/3.16.0-57-generic/vdso/.build-id/cf/1b1e904a75c1dd5a06a0d2b6eeb711798cf6e7.debug
/lib/modules/3.16.0-57-generic/vdso/.build-id/fa/
/lib/modules/3.16.0-57-generic/vdso/.build-id/fa/2b1eb87e345fb8aee60a735892fdf512399366.debug
/lib/modules/3.16.0-57-generic/vdso/vdso32-int80.so
/lib/modules/3.16.0-57-generic/vdso/vdso32-syscall.so
/lib/modules/3.16.0-57-generic/vdso/vdso32-sysenter.so
/lib/modules/3.16.0-57-generic/vdso/vdso64.so
/lib/modules/3.16.0-57-generic/vdso/vdsox32.so