app-emulation/xen: add patches for 4.13

Fix Xen security bugs
  CVE-2020-{11739,11740,11741,11742,11743}

Bug: https://bugs.gentoo.org/717446
Closes: https://github.com/gentoo/gentoo/pull/15343
Signed-off-by: Tomáš Mózes <hydrapolic@gmail.com>
Signed-off-by: Yixun Lan <dlan@gentoo.org>

2 files changed, 166 insertions, 0 deletions

diff --git a/app-emulation/xen/Manifest b/app-emulation/xen/Manifest
index 6021a3253e2f..e2a76b9d8a42 100644
--- a/app-emulation/xen/Manifest
+++ b/app-emulation/xen/Manifest
@@ -2,4 +2,5 @@ DIST xen-4.12.2-upstream-patches-1.tar.xz 17016 BLAKE2B 5bd27f6187c13b1c4792aa81
 DIST xen-4.12.2-upstream-patches-2.tar.xz 34484 BLAKE2B 79799a2fa9e638adf80ff1b5a1609b28747dad254da2e8ebd94afd75d5b7c061d25d507e7d388af17905347e180537dec8d0e27bd18cf6c53f51f7272d4adafe SHA512 abf9d82fe20fc9411384283876cf020a31e6c22ab2e54a7fae0d95ade02f434e4afb08d47c3ed5e4bc7ea5f518df7dc57baef2b8e76e3439bd937e2ee3c2b658
 DIST xen-4.12.2.tar.gz 26985135 BLAKE2B 530821011a6dd0ac0a99fb135ff5311eb8e975c3791818093b5e250eed7854d153de6d4340197f9b949c0ad2c3d7b2b7180deb42bc71748ff70ff6fad195269d SHA512 7d9e7921271830c9eadf1bb8eca1aec20d343ad7475b0dc3165ef6d681759e7cb70739f8d9f85622a23aef960988820e822267fb198b12ee3dd657ad6164069f
 DIST xen-4.13.0-upstream-patches-1.tar.xz 26000 BLAKE2B 0ab884f4b64f318c256d1959fde34da85e85a1d6974f00001125e29838f3f7d9b06ff767dff437635648eed1449976ff88250cbe141e9175d4430135e8923667 SHA512 f37514bf7ad92f8d8be798129c446fe9ec0d409e904f6b4971f07dd8b899dd20f40424a72106d7c50da83fed1f7097c575fbdeee06e18f9f4255bf6b2a71f08a
+DIST xen-4.13.0-upstream-patches-2.tar.xz 55980 BLAKE2B b85512456cac253d7f4dd0dca120d694cde0b0f4d0270023bca337f9bc693eb768c1a43d74d412c38dc665ee50a70d2985e5bfc6edde3eacc4376d2f6d7877c8 SHA512 fb852be98209e135a11241dd15e9bd174a5a3724bfaea1fc3b12ba964b8fc275946b1c443c70a78212dff0bc9b25015a00d9f902183c135053e27957b55b6bb6
 DIST xen-4.13.0.tar.gz 39005191 BLAKE2B cd85bfe549e20447afb8ec6b2ab33ea1893f45392c08737730d7898706748ebb96b2e842b2ff3e4af8c5d8a705e6d25a2bfb8acf0d7cc771805d0cc97757a949 SHA512 5b2ded9a2fe3f7ddf40eed1fa9858baead06233a01eb6099cc45b3c78b6c3823acfe7b731910733e87125dfa49d08c53f74c215fb1b320a92b44b87a0a105225
diff --git a/app-emulation/xen/xen-4.13.0-r3.ebuild b/app-emulation/xen/xen-4.13.0-r3.ebuild
new file mode 100644
index 000000000000..f95ccf1dab63
--- /dev/null
+++ b/app-emulation/xen/xen-4.13.0-r3.ebuild
@@ -0,0 +1,165 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_6 )
+
+inherit flag-o-matic mount-boot multilib python-any-r1 toolchain-funcs
+
+MY_PV=${PV/_/-}
+MY_P=${PN}-${MY_PV}
+
+if [[ $PV == *9999 ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="git://xenbits.xen.org/xen.git"
+	SRC_URI=""
+else
+	KEYWORDS="~amd64 ~arm -x86"
+	UPSTREAM_VER=2
+	SECURITY_VER=
+	GENTOO_VER=
+
+	[[ -n ${UPSTREAM_VER} ]] && \
+		UPSTREAM_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${P}-upstream-patches-${UPSTREAM_VER}.tar.xz
+		https://github.com/hydrapolic/gentoo-dist/raw/master/xen/${P}-upstream-patches-${UPSTREAM_VER}.tar.xz"
+	[[ -n ${SECURITY_VER} ]] && \
+		SECURITY_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${PN}-security-patches-${SECURITY_VER}.tar.xz"
+	[[ -n ${GENTOO_VER} ]] && \
+		GENTOO_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${PN}-gentoo-patches-${GENTOO_VER}.tar.xz"
+	SRC_URI="https://downloads.xenproject.org/release/xen/${MY_PV}/${MY_P}.tar.gz
+		${UPSTREAM_PATCHSET_URI}
+		${SECURITY_PATCHSET_URI}
+		${GENTOO_PATCHSET_URI}"
+fi
+
+DESCRIPTION="The Xen virtual machine monitor"
+HOMEPAGE="https://www.xenproject.org"
+LICENSE="GPL-2"
+SLOT="0"
+IUSE="debug efi flask"
+
+DEPEND="${PYTHON_DEPS}
+	efi? ( >=sys-devel/binutils-2.22[multitarget] )
+	!efi? ( >=sys-devel/binutils-2.22 )"
+RDEPEND=""
+PDEPEND="~app-emulation/xen-tools-${PV}"
+
+# no tests are available for the hypervisor
+# prevent the silliness of /usr/lib/debug/usr/lib/debug files
+# prevent stripping of the debug info from the /usr/lib/debug/xen-syms
+RESTRICT="test splitdebug strip"
+
+# Approved by QA team in bug #144032
+QA_WX_LOAD="boot/xen-syms-${PV}"
+
+REQUIRED_USE="arm? ( debug )"
+
+S="${WORKDIR}/${MY_P}"
+
+pkg_setup() {
+	python-any-r1_pkg_setup
+	if [[ -z ${XEN_TARGET_ARCH} ]]; then
+		if use amd64; then
+			export XEN_TARGET_ARCH="x86_64"
+		elif use arm; then
+			export XEN_TARGET_ARCH="arm32"
+		elif use arm64; then
+			export XEN_TARGET_ARCH="arm64"
+		else
+			die "Unsupported architecture!"
+		fi
+	fi
+
+	if use flask ; then
+		export "XSM_ENABLE=y"
+		export "FLASK_ENABLE=y"
+	fi
+}
+
+src_prepare() {
+	# Upstream's patchset
+	[[ -n ${UPSTREAM_VER} ]] && eapply "${WORKDIR}"/patches-upstream
+
+	# Security patchset
+	if [[ -n ${SECURITY_VER} ]]; then
+	einfo "Try to apply Xen Security patch set"
+		# apply main xen patches
+		# Two parallel systems, both work side by side
+		# Over time they may concdense into one. This will suffice for now
+		source "${WORKDIR}"/patches-security/${PV}.conf
+
+		local i
+		for i in ${XEN_SECURITY_MAIN}; do
+			eapply "${WORKDIR}"/patches-security/xen/$i
+		done
+	fi
+
+	# Gentoo's patchset
+	[[ -n ${GENTOO_VER} ]] && eapply "${WORKDIR}"/patches-gentoo
+
+	eapply "${FILESDIR}"/${PN}-4.11-efi.patch
+
+	# Drop .config
+	sed -e '/-include $(XEN_ROOT)\/.config/d' -i Config.mk || die "Couldn't	drop"
+
+	if use efi; then
+		export EFI_VENDOR="gentoo"
+		export EFI_MOUNTPOINT="/boot"
+	fi
+
+	default
+}
+
+src_configure() {
+	use arm && myopt="${myopt} CONFIG_EARLY_PRINTK=sun7i"
+
+	use debug && myopt="${myopt} debug=y"
+
+	# remove flags
+	unset CFLAGS
+	unset LDFLAGS
+	unset ASFLAGS
+
+	tc-ld-disable-gold # Bug 700374
+}
+
+src_compile() {
+	# Send raw LDFLAGS so that --as-needed works
+	emake V=1 CC="$(tc-getCC)" LDFLAGS="$(raw-ldflags)" LD="$(tc-getLD)" -C xen ${myopt}
+}
+
+src_install() {
+	local myopt
+	use debug && myopt="${myopt} debug=y"
+
+	# The 'make install' doesn't 'mkdir -p' the subdirs
+	if use efi; then
+		mkdir -p "${D}"${EFI_MOUNTPOINT}/efi/${EFI_VENDOR} || die
+	fi
+
+	emake LDFLAGS="$(raw-ldflags)" DESTDIR="${D}" -C xen ${myopt} install
+
+	# make install likes to throw in some extra EFI bits if it built
+	use efi || rm -rf "${D}/usr/$(get_libdir)/efi"
+}
+
+pkg_postinst() {
+	elog "Official Xen Guide:"
+	elog " https://wiki.gentoo.org/wiki/Xen"
+
+	use efi && einfo "The efi executable is installed in /boot/efi/gentoo"
+
+	elog "You can optionally block the installation of /boot/xen-syms by an entry"
+	elog "in folder /etc/portage/env using the portage's feature INSTALL_MASK"
+	elog "e.g. echo ${msg} > /etc/portage/env/xen.conf"
+
+	ewarn
+	ewarn "Xen 4.12+ changed the default scheduler to credit2 which can cause"
+	ewarn "domU lockups on multi-cpu systems. The legacy credit scheduler seems"
+	ewarn "to work fine."
+	ewarn
+	ewarn "Add sched=credit to xen command line options to use the legacy scheduler."
+	ewarn
+	ewarn "https://wiki.gentoo.org/wiki/Xen#Xen_domU_hanging_with_Xen_4.12.2B"
+}