/lib/modules/3.16.0-56-generic/vdso/ is in linux-image-3.16.0-56-generic 3.16.0-56.75~14.04.1.
This file is owned by root:root, with mode 0o755.
..
/lib/modules/3.16.0-56-generic/vdso/.build-id/
/lib/modules/3.16.0-56-generic/vdso/.build-id/16/
/lib/modules/3.16.0-56-generic/vdso/.build-id/16/a349b1dd02dfe66c8adcf1a9c98a6c4d03ac94.debug
/lib/modules/3.16.0-56-generic/vdso/.build-id/38/
/lib/modules/3.16.0-56-generic/vdso/.build-id/38/bcde0f590b01f75925985036d9009167599701.debug
/lib/modules/3.16.0-56-generic/vdso/.build-id/51/
/lib/modules/3.16.0-56-generic/vdso/.build-id/51/eccdfac111cf1f0fc448a31646427bdc065ac4.debug
/lib/modules/3.16.0-56-generic/vdso/.build-id/62/
/lib/modules/3.16.0-56-generic/vdso/.build-id/62/3ed75b1ab711a57b1adc5c9c248585d4d856c9.debug
/lib/modules/3.16.0-56-generic/vdso/.build-id/87/
/lib/modules/3.16.0-56-generic/vdso/.build-id/87/2bece9301f809f6bf408d6f12a96605f660bd3.debug
/lib/modules/3.16.0-56-generic/vdso/vdso32-int80.so
/lib/modules/3.16.0-56-generic/vdso/vdso32-syscall.so
/lib/modules/3.16.0-56-generic/vdso/vdso32-sysenter.so
/lib/modules/3.16.0-56-generic/vdso/vdso64.so
/lib/modules/3.16.0-56-generic/vdso/vdsox32.so