lkrg-module: Add Linux Kernel Runtime Guard

For more info see: https://github.com/openwall/lkrg

Add to local.conf:
IMAGE_INSTALL_append = " kernel-module-lkrg"

Need these kconfig options enabled:
CONFIG_KALLSYMS_ALL=y
CONFIG_JUMP_LABEL=y
CONFIG_DEBUG_KERNEL=y

To invoke module:

sudo insmod {path-to-modules}/p_lkrg.ko kint_enforce=1

Signed-off-by: Armin Kuster <akuster808@gmail.com>

recipes-kernel/lkrg/lkrg-module_0.9.0.bb

@@ -0,0 +1,33 @@
+SUMMARY = "Linux Kernel Runtime Guard"
+DESCRIPTION="LKRG performs runtime integrity checking of the Linux \
+kernel and detection of security vulnerability exploits against the kernel."
+SECTION = "security"
+HOMEPAGE = "https://www.openwall.com/lkrg/"
+LICENSE = "GPLv2"
+
+LIC_FILES_CHKSUM = "file://LICENSE;md5=d931f44a1f4be309bcdac742d7ed92f9"
+
+DEPENDS = "virtual/kernel elfutils"
+
+SRC_URI = "https://www.openwall.com/lkrg/lkrg-${PV}.tar.gz \
+           file://makefile_cleanup.patch "
+
+SRC_URI[sha256sum] = "a997e4d98962c359f3af163bbcfa38a736d2a50bfe35c15065b74cb57f8742bf"
+
+S = "${WORKDIR}/lkrg-${PV}"
+
+inherit module kernel-module-split
+
+MAKE_TARGETS = "modules"
+
+MODULE_NAME = "p_lkrg"
+
+module_do_install() {
+    install -d ${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/kernel/${MODULE_NAME}
+    install -m 0644 ${MODULE_NAME}.ko \
+    ${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/kernel/${MODULE_NAME}/${MODULE_NAME}.ko
+}
+
+RPROVIDES_${PN} += "kernel-module-lkrg"
+
+COMPATIBLE_HOST = "(i.86|x86_64|arm|aarch64).*-linux"