/usr/src/linux-headers-3.13.0-157/samples/ is in linux-headers-3.13.0-157 3.13.0-157.207.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-headers-3.13.0-157/samples/Kconfig
/usr/src/linux-headers-3.13.0-157/samples/Makefile
/usr/src/linux-headers-3.13.0-157/samples/hidraw/
/usr/src/linux-headers-3.13.0-157/samples/hidraw/Makefile
/usr/src/linux-headers-3.13.0-157/samples/hw_breakpoint/
/usr/src/linux-headers-3.13.0-157/samples/hw_breakpoint/Makefile
/usr/src/linux-headers-3.13.0-157/samples/kdb/
/usr/src/linux-headers-3.13.0-157/samples/kdb/Makefile
/usr/src/linux-headers-3.13.0-157/samples/kfifo/
/usr/src/linux-headers-3.13.0-157/samples/kfifo/Makefile
/usr/src/linux-headers-3.13.0-157/samples/kobject/
/usr/src/linux-headers-3.13.0-157/samples/kobject/Makefile
/usr/src/linux-headers-3.13.0-157/samples/kprobes/
/usr/src/linux-headers-3.13.0-157/samples/kprobes/Makefile
/usr/src/linux-headers-3.13.0-157/samples/rpmsg/
/usr/src/linux-headers-3.13.0-157/samples/rpmsg/Makefile
/usr/src/linux-headers-3.13.0-157/samples/seccomp/
/usr/src/linux-headers-3.13.0-157/samples/seccomp/Makefile
/usr/src/linux-headers-3.13.0-157/samples/trace_events/
/usr/src/linux-headers-3.13.0-157/samples/trace_events/Makefile
/usr/src/linux-headers-3.13.0-157/samples/uhid/
/usr/src/linux-headers-3.13.0-157/samples/uhid/Makefile