/lib/modules/4.2.0-42-generic/vdso/ is in linux-image-4.2.0-42-generic 4.2.0-42.49~14.04.1.
This file is owned by root:root, with mode 0o755.
..
/lib/modules/4.2.0-42-generic/vdso/.build-id/
/lib/modules/4.2.0-42-generic/vdso/.build-id/4c/
/lib/modules/4.2.0-42-generic/vdso/.build-id/4c/2aeccbef195b14986b706ca9b809a76dba404f.debug
/lib/modules/4.2.0-42-generic/vdso/.build-id/c9/
/lib/modules/4.2.0-42-generic/vdso/.build-id/c9/c195004eb3d8275fbfca2fe61f60e0923ae12d.debug
/lib/modules/4.2.0-42-generic/vdso/.build-id/d7/
/lib/modules/4.2.0-42-generic/vdso/.build-id/d7/a2dce267484d2dad484dadf597a4bea36d0c24.debug
/lib/modules/4.2.0-42-generic/vdso/.build-id/dd/
/lib/modules/4.2.0-42-generic/vdso/.build-id/dd/48c65d1041508206e1772ec700c49e7f278747.debug
/lib/modules/4.2.0-42-generic/vdso/.build-id/f1/
/lib/modules/4.2.0-42-generic/vdso/.build-id/f1/c0f081bbc214239b65f44fec189178b473cfe8.debug
/lib/modules/4.2.0-42-generic/vdso/vdso32-int80.so
/lib/modules/4.2.0-42-generic/vdso/vdso32-syscall.so
/lib/modules/4.2.0-42-generic/vdso/vdso32-sysenter.so
/lib/modules/4.2.0-42-generic/vdso/vdso64.so
/lib/modules/4.2.0-42-generic/vdso/vdsox32.so