sys-kernel/gentoo-kernel: Backport CVE-2023-32233 fix to 6.3.1-r1

Signed-off-by: Michał Górny <mgorny@gentoo.org>

1 files changed, 140 insertions, 0 deletions

diff --git a/sys-kernel/gentoo-kernel/gentoo-kernel-6.3.1-r1.ebuild b/sys-kernel/gentoo-kernel/gentoo-kernel-6.3.1-r1.ebuild
new file mode 100644
index 000000000000..7832a0fc4616
--- /dev/null
+++ b/sys-kernel/gentoo-kernel/gentoo-kernel-6.3.1-r1.ebuild
@@ -0,0 +1,140 @@
+# Copyright 2020-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit kernel-build toolchain-funcs
+
+MY_P=linux-${PV%.*}
+GENPATCHES_P=genpatches-${PV%.*}-$(( ${PV##*.} + 2 ))
+# https://koji.fedoraproject.org/koji/packageinfo?packageID=8
+# forked to https://github.com/projg2/fedora-kernel-config-for-gentoo
+CONFIG_VER=6.3.1-gentoo
+GENTOO_CONFIG_VER=g7
+
+DESCRIPTION="Linux kernel built with Gentoo patches"
+HOMEPAGE="
+	https://wiki.gentoo.org/wiki/Project:Distribution_Kernel
+	https://www.kernel.org/
+"
+SRC_URI+="
+	https://cdn.kernel.org/pub/linux/kernel/v$(ver_cut 1).x/${MY_P}.tar.xz
+	https://dev.gentoo.org/~mpagano/dist/genpatches/${GENPATCHES_P}.base.tar.xz
+	https://dev.gentoo.org/~mpagano/dist/genpatches/${GENPATCHES_P}.extras.tar.xz
+	https://github.com/projg2/gentoo-kernel-config/archive/${GENTOO_CONFIG_VER}.tar.gz
+		-> gentoo-kernel-config-${GENTOO_CONFIG_VER}.tar.gz
+	amd64? (
+		https://raw.githubusercontent.com/projg2/fedora-kernel-config-for-gentoo/${CONFIG_VER}/kernel-x86_64-fedora.config
+			-> kernel-x86_64-fedora.config.${CONFIG_VER}
+	)
+	arm64? (
+		https://raw.githubusercontent.com/projg2/fedora-kernel-config-for-gentoo/${CONFIG_VER}/kernel-aarch64-fedora.config
+			-> kernel-aarch64-fedora.config.${CONFIG_VER}
+	)
+	ppc64? (
+		https://raw.githubusercontent.com/projg2/fedora-kernel-config-for-gentoo/${CONFIG_VER}/kernel-ppc64le-fedora.config
+			-> kernel-ppc64le-fedora.config.${CONFIG_VER}
+	)
+	x86? (
+		https://raw.githubusercontent.com/projg2/fedora-kernel-config-for-gentoo/${CONFIG_VER}/kernel-i686-fedora.config
+			-> kernel-i686-fedora.config.${CONFIG_VER}
+	)
+"
+S=${WORKDIR}/${MY_P}
+
+LICENSE="GPL-2"
+KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~ppc ~ppc64 ~riscv ~x86"
+IUSE="debug hardened"
+REQUIRED_USE="arm? ( savedconfig )
+	hppa? ( savedconfig )
+	riscv? ( savedconfig )"
+
+RDEPEND="
+	!sys-kernel/gentoo-kernel-bin:${SLOT}
+"
+BDEPEND="
+	debug? ( dev-util/pahole )
+"
+PDEPEND="
+	>=virtual/dist-kernel-${PV}
+"
+
+QA_FLAGS_IGNORED="
+	usr/src/linux-.*/scripts/gcc-plugins/.*.so
+	usr/src/linux-.*/vmlinux
+	usr/src/linux-.*/arch/powerpc/kernel/vdso.*/vdso.*.so.dbg
+"
+
+src_prepare() {
+	local PATCHES=(
+		# meh, genpatches have no directory
+		"${WORKDIR}"/*.patch
+	)
+	default
+
+	local biendian=false
+
+	# prepare the default config
+	case ${ARCH} in
+		amd64)
+			cp "${DISTDIR}/kernel-x86_64-fedora.config.${CONFIG_VER}" .config || die
+			;;
+		arm)
+			return
+			;;
+		arm64)
+			cp "${DISTDIR}/kernel-aarch64-fedora.config.${CONFIG_VER}" .config || die
+			biendian=true
+			;;
+		hppa)
+			return
+			;;
+		ppc)
+			# assume powermac/powerbook defconfig
+			# we still package.use.force savedconfig
+			cp "${WORKDIR}/${MY_P}/arch/powerpc/configs/pmac32_defconfig" .config || die
+			;;
+		ppc64)
+			cp "${DISTDIR}/kernel-ppc64le-fedora.config.${CONFIG_VER}" .config || die
+			biendian=true
+			;;
+		riscv)
+			return
+			;;
+		x86)
+			cp "${DISTDIR}/kernel-i686-fedora.config.${CONFIG_VER}" .config || die
+			;;
+		*)
+			die "Unsupported arch ${ARCH}"
+			;;
+	esac
+
+	local myversion="-gentoo-dist"
+	use hardened && myversion+="-hardened"
+	echo "CONFIG_LOCALVERSION=\"${myversion}\"" > "${T}"/version.config || die
+	local dist_conf_path="${WORKDIR}/gentoo-kernel-config-${GENTOO_CONFIG_VER}"
+
+	local merge_configs=(
+		"${T}"/version.config
+		"${dist_conf_path}"/base.config
+	)
+	use debug || merge_configs+=(
+		"${dist_conf_path}"/no-debug.config
+	)
+	if use hardened; then
+		merge_configs+=( "${dist_conf_path}"/hardened-base.config )
+
+		tc-is-gcc && merge_configs+=( "${dist_conf_path}"/hardened-gcc-plugins.config )
+
+		if [[ -f "${dist_conf_path}/hardened-${ARCH}.config" ]]; then
+			merge_configs+=( "${dist_conf_path}/hardened-${ARCH}.config" )
+		fi
+	fi
+
+	# this covers ppc64 and aarch64_be only for now
+	if [[ ${biendian} == true && $(tc-endian) == big ]]; then
+		merge_configs+=( "${dist_conf_path}/big-endian.config" )
+	fi
+
+	kernel-build_merge_configs "${merge_configs[@]}"
+}