Split base/ into base/ and tools/

Signed-off-by: Riyaz Faizullabhoy <riyaz.faizullabhoy@docker.com>

tools/check-kernel-config/Dockerfile

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+FROM alpine:3.5
+ADD check-kernel-config.sh /usr/bin/check-kernel-config.sh
+ENTRYPOINT ["/bin/sh", "/usr/bin/check-kernel-config.sh"]

tools/check-kernel-config/Makefile

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+.PHONY: tag push
+
+BASE=alpine:3.5
+IMAGE=check-kernel-config
+
+default: push
+
+hash: Dockerfile check-kernel-config.sh
+	DOCKER_CONTENT_TRUST=1 docker pull $(BASE)
+	tar cf - $^ | docker build --no-cache -t $(IMAGE):build -
+	docker run --rm --entrypoint=/bin/sh $(IMAGE):build -c 'cat /usr/bin/check-kernel-config.sh /lib/apk/db/installed | sha1sum' | sed 's/ .*//' > hash
+
+push: hash
+	docker pull mobylinux/$(IMAGE):$(shell cat hash) || \
+		(docker tag $(IMAGE):build mobylinux/$(IMAGE):$(shell cat hash) && \
+		 docker push mobylinux/$(IMAGE):$(shell cat hash))
+	docker rmi $(IMAGE):build
+	rm -f hash
+
+tag: hash
+	docker pull mobylinux/$(IMAGE):$(shell cat hash) || \
+		docker tag $(IMAGE):build mobylinux/$(IMAGE):$(shell cat hash)
+	docker rmi $(IMAGE):build
+	rm -f hash
+
+clean:
+	rm -f hash
+
+.DELETE_ON_ERROR:

tools/check-kernel-config/check-kernel-config.sh

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+#!/bin/sh
+
+set -e
+
+echo "starting kernel config sanity test with /proc/config.gz"
+
+# decompress /proc/config.gz from the Moby host
+zcat /proc/config.gz > unzipped_config
+
+kernelVersion="$(uname -r)"
+kernelMajor="${kernelVersion%%.*}"
+kernelMinor="${kernelVersion#$kernelMajor.}"
+kernelMinor="${kernelMinor%%.*}"
+
+# Most tests against https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project
+# Positive cases
+cat unzipped_config | grep CONFIG_BUG=y
+cat unzipped_config | grep CONFIG_DEBUG_KERNEL=y
+cat unzipped_config | grep CONFIG_DEBUG_RODATA=y
+cat unzipped_config | grep CONFIG_CC_STACKPROTECTOR=y
+cat unzipped_config | grep CONFIG_CC_STACKPROTECTOR_STRONG=y
+cat unzipped_config | grep CONFIG_STRICT_DEVMEM=y
+cat unzipped_config | grep CONFIG_SYN_COOKIES=y
+cat unzipped_config | grep CONFIG_DEBUG_CREDENTIALS=y
+cat unzipped_config | grep CONFIG_DEBUG_NOTIFIERS=y
+cat unzipped_config | grep CONFIG_DEBUG_LIST=y
+cat unzipped_config | grep CONFIG_SECCOMP=y
+cat unzipped_config | grep CONFIG_SECCOMP_FILTER=y
+cat unzipped_config | grep CONFIG_SECURITY=y
+cat unzipped_config | grep CONFIG_SECURITY_YAMA=y
+cat unzipped_config | grep CONFIG_PANIC_ON_OOPS=y
+cat unzipped_config | grep CONFIG_DEBUG_SET_MODULE_RONX=y
+
+# Conditional on kernel version
+if [ "$kernelMajor" -ge 4 -a "$kernelMinor" -ge 5 ]; then
+  cat unzipped_config | grep CONFIG_IO_STRICT_DEVMEM=y
+  cat unzipped_config | grep CONFIG_UBSAN=y
+fi
+if [ "$kernelMajor" -ge 4 -a "$kernelMinor" -ge 7 ]; then
+  cat unzipped_config | grep CONFIG_SLAB_FREELIST_RANDOM=y
+fi
+if [ "$kernelMajor" -ge 4 -a "$kernelMinor" -ge 8 ]; then
+  cat unzipped_config | grep CONFIG_HARDENED_USERCOPY=y
+fi
+
+# Negative cases
+cat unzipped_config | grep 'CONFIG_ACPI_CUSTOM_METHOD is not set'
+cat unzipped_config | grep 'CONFIG_COMPAT_BRK is not set'
+cat unzipped_config | grep 'CONFIG_DEVKMEM is not set'
+cat unzipped_config | grep 'CONFIG_COMPAT_VDSO is not set'
+cat unzipped_config | grep 'CONFIG_KEXEC is not set'
+cat unzipped_config | grep 'CONFIG_HIBERNATION is not set'
+cat unzipped_config | grep 'CONFIG_LEGACY_PTYS is not set'