From mboxrd@z Thu Jan 1 00:00:00 1970 From: aduskett at gmail.com Date: Sat, 14 Dec 2019 17:15:16 -0800 Subject: [Buildroot] [PATCH 1/2] package/libsemanage: add option to manually define policy version In-Reply-To: <20191215011517.1977342-1-aduskett@gmail.com> References: <20191215011517.1977342-1-aduskett@gmail.com> Message-ID: <20191215011517.1977342-2-aduskett@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net From: Adam Duskett The semodule package derives the maximum SELinux policy version from the libsemanage library. By default, libsemanage returns the highest supported policy version that libsepol supports found in include/sepol/policydb/policydb.h and not from the Kernel. However, if the maximum supported SELinux policy version supported by the Kernel is lower than the maximum supported policy version from libsemanage, if a user attempts to build a policy using the semodule program, semodule fails when creating a policy with the error: policydb version X does not match my version range 15-X. This default value may be overwrriten by setting the policy-version = line in /etc/semanage/semanage.conf. Create an option that allows a user to overwrite the default policy version to ensure that semodule works on older kernels. Signed-off-by: Adam Duskett --- package/libsemanage/Config.in | 29 +++++++++++++++++++++++++++++ package/libsemanage/libsemanage.mk | 23 +++++++++++++++++++++++ 2 files changed, 52 insertions(+) diff --git a/package/libsemanage/Config.in b/package/libsemanage/Config.in index 3c7050ee51..814bf293d7 100644 --- a/package/libsemanage/Config.in +++ b/package/libsemanage/Config.in @@ -17,6 +17,35 @@ config BR2_PACKAGE_LIBSEMANAGE http://selinuxproject.org/page/Main_Page +if BR2_PACKAGE_LIBSEMANAGE + +config BR2_PACKAGE_LIBSEMANAGE_POLICY_MANUAL_VERSION + bool "Manually specify the policy version" + help + Manually specify the policy version to build. + +if BR2_PACKAGE_LIBSEMANAGE_POLICY_MANUAL_VERSION + +config BR2_PACKAGE_LIBSEMANAGE_POLICY_MAX_VERSION + int "maximum policy version" + default 25 + range 25 31 + help + The maximum SELinux policy version your kernel supports. + + Here's a handy table to help you choose: + kernel version SElinux policy max version + <= 2.6.x 25 + > 2.6 <= 3.5 26 + > 3.5 <= 3.14 28 (27 and 28 were added@the same time) + > 3.14 <= 4.3 29 + > 4.3 <= 4.13 30 + > 4.13 <= 5.5 31 + +endif # BR2_PACKAGE_LIBSEMANAGE_POLICY_MANUAL_VERSION + +endif # BR2_PACKAGE_LIBSEMANAGE + comment "libsemanage needs a toolchain w/ threads, dynamic library" depends on BR2_PACKAGE_AUDIT_ARCH_SUPPORTS depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS diff --git a/package/libsemanage/libsemanage.mk b/package/libsemanage/libsemanage.mk index fd90346049..1415916b1f 100644 --- a/package/libsemanage/libsemanage.mk +++ b/package/libsemanage/libsemanage.mk @@ -13,6 +13,29 @@ LIBSEMANAGE_INSTALL_STAGING = YES LIBSEMANAGE_MAKE_OPTS = $(TARGET_CONFIGURE_OPTS) +# Semodule derives the maximum SELinux policy version from libsemanage. +# By default, libsemanage returns the highest supported policy version that +# libsepol supports found in include/sepol/policydb/policydb.h and not just +# from the Kernel. However, if the maximum supported SELinux policy version +# supported by the Kernel is lower than the maximum supported policy version +# from libsemanage, if a user attempts to build a policy using the semodule +# program, semodule fails when creating a policy with the error: +# policydb version X does not match my version range 15-X. + +# This default value may be overwrriten by setting the policy-version = line in +# /etc/semanage/semanage.conf. +LIBSEMANAGE_MAX_POLICY_VERSION = 31 +ifeq ($(BR2_PACKAGE_LIBSEMANAGE_POLICY_MANUAL_VERSION),y) +LIBSEMANAGE_MAX_POLICY_VERSION = $(BR2_PACKAGE_LIBSEMANAGE_POLICY_MAX_VERSION) +endif + +define LIBSEMANAGE_SET_SEMANAGE_MAX_POLICY + $(SED) "/policy-version = /c\policy-version = $(LIBSEMANAGE_MAX_POLICY_VERSION)" \ + $(TARGET_DIR)/etc/selinux/semanage.conf +endef +LIBSEMANAGE_POST_INSTALL_TARGET_HOOKS += LIBSEMANAGE_SET_SEMANAGE_MAX_POLICY +HOST_LIBSEMANAGE_POST_INSTALL_HOOKS += LIBSEMANAGE_SET_SEMANAGE_MAX_POLICY + define LIBSEMANAGE_BUILD_CMDS $(TARGET_MAKE_ENV) $(MAKE) -C $(@D) $(LIBSEMANAGE_MAKE_OPTS) all endef -- 2.23.0