/lib/modules/3.16.0-52-generic/vdso/ is in linux-image-3.16.0-52-generic 3.16.0-52.71~14.04.1.
This file is owned by root:root, with mode 0o755.
..
/lib/modules/3.16.0-52-generic/vdso/.build-id/
/lib/modules/3.16.0-52-generic/vdso/.build-id/16/
/lib/modules/3.16.0-52-generic/vdso/.build-id/16/42509848ad649a55be415581dfd4d2b5e4a451.debug
/lib/modules/3.16.0-52-generic/vdso/.build-id/61/
/lib/modules/3.16.0-52-generic/vdso/.build-id/61/fe1ea71a92f196a8578761428b356f4b9c91a2.debug
/lib/modules/3.16.0-52-generic/vdso/.build-id/7d/
/lib/modules/3.16.0-52-generic/vdso/.build-id/7d/7b8724739eefbc17c970ad095c5910f1767431.debug
/lib/modules/3.16.0-52-generic/vdso/.build-id/95/
/lib/modules/3.16.0-52-generic/vdso/.build-id/95/309827951ef4ae36e5e703ce9b531e7cd7db1d.debug
/lib/modules/3.16.0-52-generic/vdso/.build-id/ff/
/lib/modules/3.16.0-52-generic/vdso/.build-id/ff/30e0aeddef8ec6da56521687e1e902710949a0.debug
/lib/modules/3.16.0-52-generic/vdso/vdso32-int80.so
/lib/modules/3.16.0-52-generic/vdso/vdso32-syscall.so
/lib/modules/3.16.0-52-generic/vdso/vdso32-sysenter.so
/lib/modules/3.16.0-52-generic/vdso/vdso64.so
/lib/modules/3.16.0-52-generic/vdso/vdsox32.so