/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/ is in linux-gcp-headers-4.18.0-1005 4.18.0-1005.6~18.04.1.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/Kconfig
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/Makefile
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/firmware_loader/
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/firmware_loader/Kconfig
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/firmware_loader/Makefile
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/power/
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/power/Makefile
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/regmap/
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/regmap/Kconfig
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/regmap/Makefile
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/test/
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/test/Kconfig
/usr/src/linux-gcp-headers-4.18.0-1005/drivers/base/test/Makefile