/lib/modules/3.16.0-50-generic/vdso/ is in linux-image-3.16.0-50-generic 3.16.0-50.67~14.04.1.
This file is owned by root:root, with mode 0o755.
..
/lib/modules/3.16.0-50-generic/vdso/.build-id/
/lib/modules/3.16.0-50-generic/vdso/.build-id/2f/
/lib/modules/3.16.0-50-generic/vdso/.build-id/2f/a7170a832541c10d4678a470452523acefd954.debug
/lib/modules/3.16.0-50-generic/vdso/.build-id/6c/
/lib/modules/3.16.0-50-generic/vdso/.build-id/6c/47b7c04471c2cdf31e2ab266340444a2d569d2.debug
/lib/modules/3.16.0-50-generic/vdso/.build-id/99/
/lib/modules/3.16.0-50-generic/vdso/.build-id/99/8cb59d6b0213e01f9ae14ec063d1547816589b.debug
/lib/modules/3.16.0-50-generic/vdso/.build-id/da/
/lib/modules/3.16.0-50-generic/vdso/.build-id/da/9283062ef1a07866343c6ef360bc94b3b4430c.debug
/lib/modules/3.16.0-50-generic/vdso/.build-id/f3/
/lib/modules/3.16.0-50-generic/vdso/.build-id/f3/15b5c846650518620f483474bf028a15f88d39.debug
/lib/modules/3.16.0-50-generic/vdso/vdso32-int80.so
/lib/modules/3.16.0-50-generic/vdso/vdso32-syscall.so
/lib/modules/3.16.0-50-generic/vdso/vdso32-sysenter.so
/lib/modules/3.16.0-50-generic/vdso/vdso64.so
/lib/modules/3.16.0-50-generic/vdso/vdsox32.so