app-emulation/lxc: fix CVE-2018-6556

Apply patches from upstream. In the case of the 2.1.1 patch, I had to
modify it to make the code compile. See ADDENDUM in patch.

Bug: https://bugs.gentoo.org/662780
Package-Manager: Portage-2.3.44, Repoman-2.3.10

4 files changed, 606 insertions, 0 deletions

diff --git a/app-emulation/lxc/files/lxc-2.1.1-cve-2018-6556.patch b/app-emulation/lxc/files/lxc-2.1.1-cve-2018-6556.patch
new file mode 100644
index 000000000000..bad1e274527e
--- /dev/null
+++ b/app-emulation/lxc/files/lxc-2.1.1-cve-2018-6556.patch
@@ -0,0 +1,118 @@
+From d183654ec1a2cd1149bdb92601ccb7246bddb14e Mon Sep 17 00:00:00 2001
+From: Christian Brauner <christian.brauner@ubuntu.com>
+Date: Wed, 25 Jul 2018 19:56:54 +0200
+Subject: [PATCH] CVE 2018-6556: verify netns fd in lxc-user-nic
+
+Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
+---
+ src/lxc/lxc_user_nic.c | 35 ++++++++++++++++++++++++++++++++---
+ src/lxc/utils.c        | 12 ++++++++++++
+ src/lxc/utils.h        |  5 +++++
+ 3 files changed, 49 insertions(+), 3 deletions(-)
+
+ADDENDUM from vdupras@gentoo.org: Original patch from Christian didn't
+include LXC_PROC_PID_FD_LEN define, but referenced it. This resulted in
+code that doesn't compile. I fetched the definition from the stable-3.0
+branch and included it to this patch. Also, this diff is regenerated
+from lxc-2.1.1 tag instead of stable-2.0 branch.
+
+diff --git a/src/lxc/lxc_user_nic.c b/src/lxc/lxc_user_nic.c
+index 6f550f0d..09a342ac 100644
+--- a/src/lxc/lxc_user_nic.c
++++ b/src/lxc/lxc_user_nic.c
+@@ -1124,12 +1124,41 @@ int main(int argc, char *argv[])
+ 			exit(EXIT_FAILURE);
+ 		}
+ 	} else if (request == LXC_USERNIC_DELETE) {
+-		netns_fd = open(args.pid, O_RDONLY);
++		char opath[LXC_PROC_PID_FD_LEN];
++
++		/* Open the path with O_PATH which will not trigger an actual
++		 * open(). Don't report an errno to the caller to not leak
++		 * information whether the path exists or not.
++		 * When stracing setuid is stripped so this is not a concern
++		 * either.
++		 */
++		netns_fd = open(args.pid, O_PATH | O_CLOEXEC);
+ 		if (netns_fd < 0) {
+-			usernic_error("Could not open \"%s\": %s\n", args.pid,
+-				      strerror(errno));
++			usernic_error("Failed to open \"%s\"\n", args.pid);
+ 			exit(EXIT_FAILURE);
+ 		}
++
++		if (!fhas_fs_type(netns_fd, NSFS_MAGIC)) {
++			usernic_error("Path \"%s\" does not refer to a network namespace path\n", args.pid);
++			close(netns_fd);
++			exit(EXIT_FAILURE);
++		}
++
++		ret = snprintf(opath, sizeof(opath), "/proc/self/fd/%d", netns_fd);
++		if (ret < 0 || (size_t)ret >= sizeof(opath)) {
++			close(netns_fd);
++			exit(EXIT_FAILURE);
++		}
++
++		/* Now get an fd that we can use in setns() calls. */
++		ret = open(opath, O_RDONLY | O_CLOEXEC);
++		if (ret < 0) {
++			usernic_error("Failed to open \"%s\": %s\n", args.pid, strerror(errno));
++			close(netns_fd);
++			exit(EXIT_FAILURE);
++		}
++		close(netns_fd);
++		netns_fd = ret;
+ 	}
+ 
+ 	if (!create_db_dir(LXC_USERNIC_DB)) {
+diff --git a/src/lxc/utils.c b/src/lxc/utils.c
+index e6a44a51..c2a08a9d 100644
+--- a/src/lxc/utils.c
++++ b/src/lxc/utils.c
+@@ -2380,6 +2380,18 @@ bool has_fs_type(const char *path, fs_type_magic magic_val)
+ 	return has_type;
+ }
+ 
++bool fhas_fs_type(int fd, fs_type_magic magic_val)
++{
++	int ret;
++	struct statfs sb;
++
++	ret = fstatfs(fd, &sb);
++	if (ret < 0)
++		return false;
++
++	return is_fs_type(&sb, magic_val);
++}
++
+ bool lxc_nic_exists(char *nic)
+ {
+ #define __LXC_SYS_CLASS_NET_LEN 15 + IFNAMSIZ + 1
+diff --git a/src/lxc/utils.h b/src/lxc/utils.h
+index e83ed49e..06ec74d7 100644
+--- a/src/lxc/utils.h
++++ b/src/lxc/utils.h
+@@ -46,11 +46,16 @@
+ #define __S_ISTYPE(mode, mask) (((mode)&S_IFMT) == (mask))
+ #endif
+ 
++#ifndef NSFS_MAGIC
++#define NSFS_MAGIC 0x6e736673
++#endif
++
+ /* Useful macros */
+ /* Maximum number for 64 bit integer is a string with 21 digits: 2^64 - 1 = 21 */
+ #define LXC_NUMSTRLEN64 21
+ #define LXC_LINELEN 4096
+ #define LXC_IDMAPLEN 4096
++#define LXC_PROC_PID_FD_LEN (6 + LXC_NUMSTRLEN64 + 4 + LXC_NUMSTRLEN64 + 1)
+ 
+ /* returns 1 on success, 0 if there were any failures */
+ extern int lxc_rmdir_onedev(char *path, const char *exclude);
+@@ -402,6 +407,7 @@ extern void *must_realloc(void *orig, size_t sz);
+ /* __typeof__ should be safe to use with all compilers. */
+ typedef __typeof__(((struct statfs *)NULL)->f_type) fs_type_magic;
+ extern bool has_fs_type(const char *path, fs_type_magic magic_val);
++extern bool fhas_fs_type(int fd, fs_type_magic magic_val);
+ extern bool is_fs_type(const struct statfs *fs, fs_type_magic magic_val);
+ extern bool lxc_nic_exists(char *nic);
diff --git a/app-emulation/lxc/files/lxc-3.0.1-cve-2018-6556.patch b/app-emulation/lxc/files/lxc-3.0.1-cve-2018-6556.patch
new file mode 100644
index 000000000000..198e835e6c59
--- /dev/null
+++ b/app-emulation/lxc/files/lxc-3.0.1-cve-2018-6556.patch
@@ -0,0 +1,110 @@
+From f2314625c5702cfd25974929599fa439bdac8bdf Mon Sep 17 00:00:00 2001
+From: Christian Brauner <christian.brauner@ubuntu.com>
+Date: Wed, 25 Jul 2018 19:56:54 +0200
+Subject: [PATCH] CVE 2018-6556: verify netns fd in lxc-user-nic
+
+Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
+---
+ src/lxc/cmd/lxc_user_nic.c | 35 ++++++++++++++++++++++++++++++++---
+ src/lxc/utils.c            | 12 ++++++++++++
+ src/lxc/utils.h            |  5 +++++
+ 3 files changed, 49 insertions(+), 3 deletions(-)
+
+diff --git a/src/lxc/cmd/lxc_user_nic.c b/src/lxc/cmd/lxc_user_nic.c
+index ec9cd97e..c5beb6c8 100644
+--- a/src/lxc/cmd/lxc_user_nic.c
++++ b/src/lxc/cmd/lxc_user_nic.c
+@@ -1179,12 +1179,41 @@ int main(int argc, char *argv[])
+ 			exit(EXIT_FAILURE);
+ 		}
+ 	} else if (request == LXC_USERNIC_DELETE) {
+-		netns_fd = open(args.pid, O_RDONLY);
++		char opath[LXC_PROC_PID_FD_LEN];
++
++		/* Open the path with O_PATH which will not trigger an actual
++		 * open(). Don't report an errno to the caller to not leak
++		 * information whether the path exists or not.
++		 * When stracing setuid is stripped so this is not a concern
++		 * either.
++		 */
++		netns_fd = open(args.pid, O_PATH | O_CLOEXEC);
+ 		if (netns_fd < 0) {
+-			usernic_error("Could not open \"%s\": %s\n", args.pid,
+-				      strerror(errno));
++			usernic_error("Failed to open \"%s\"\n", args.pid);
++			exit(EXIT_FAILURE);
++		}
++
++		if (!fhas_fs_type(netns_fd, NSFS_MAGIC)) {
++			usernic_error("Path \"%s\" does not refer to a network namespace path\n", args.pid);
++			close(netns_fd);
++			exit(EXIT_FAILURE);
++		}
++
++		ret = snprintf(opath, sizeof(opath), "/proc/self/fd/%d", netns_fd);
++		if (ret < 0 || (size_t)ret >= sizeof(opath)) {
++			close(netns_fd);
++			exit(EXIT_FAILURE);
++		}
++
++		/* Now get an fd that we can use in setns() calls. */
++		ret = open(opath, O_RDONLY | O_CLOEXEC);
++		if (ret < 0) {
++			usernic_error("Failed to open \"%s\": %s\n", args.pid, strerror(errno));
++			close(netns_fd);
+ 			exit(EXIT_FAILURE);
+ 		}
++		close(netns_fd);
++		netns_fd = ret;
+ 	}
+ 
+ 	if (!create_db_dir(LXC_USERNIC_DB)) {
+diff --git a/src/lxc/utils.c b/src/lxc/utils.c
+index 26f1b058..69d362dc 100644
+--- a/src/lxc/utils.c
++++ b/src/lxc/utils.c
+@@ -2548,6 +2548,18 @@ bool has_fs_type(const char *path, fs_type_magic magic_val)
+ 	return has_type;
+ }
+ 
++bool fhas_fs_type(int fd, fs_type_magic magic_val)
++{
++	int ret;
++	struct statfs sb;
++
++	ret = fstatfs(fd, &sb);
++	if (ret < 0)
++		return false;
++
++	return is_fs_type(&sb, magic_val);
++}
++
+ bool lxc_nic_exists(char *nic)
+ {
+ #define __LXC_SYS_CLASS_NET_LEN 15 + IFNAMSIZ + 1
+diff --git a/src/lxc/utils.h b/src/lxc/utils.h
+index 7d672b77..fedc395b 100644
+--- a/src/lxc/utils.h
++++ b/src/lxc/utils.h
+@@ -95,6 +95,10 @@
+ #define CGROUP2_SUPER_MAGIC 0x63677270
+ #endif
+ 
++#ifndef NSFS_MAGIC
++#define NSFS_MAGIC 0x6e736673
++#endif
++
+ /* Useful macros */
+ /* Maximum number for 64 bit integer is a string with 21 digits: 2^64 - 1 = 21 */
+ #define LXC_NUMSTRLEN64 21
+@@ -581,6 +585,7 @@ extern void *must_realloc(void *orig, size_t sz);
+ /* __typeof__ should be safe to use with all compilers. */
+ typedef __typeof__(((struct statfs *)NULL)->f_type) fs_type_magic;
+ extern bool has_fs_type(const char *path, fs_type_magic magic_val);
++extern bool fhas_fs_type(int fd, fs_type_magic magic_val);
+ extern bool is_fs_type(const struct statfs *fs, fs_type_magic magic_val);
+ extern bool lxc_nic_exists(char *nic);
+ extern int lxc_make_tmpfile(char *template, bool rm);
+-- 
+2.17.1
+
diff --git a/app-emulation/lxc/lxc-2.1.1-r1.ebuild b/app-emulation/lxc/lxc-2.1.1-r1.ebuild
new file mode 100644
index 000000000000..e5915426973b
--- /dev/null
+++ b/app-emulation/lxc/lxc-2.1.1-r1.ebuild
@@ -0,0 +1,215 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+PYTHON_COMPAT=( python3_{4,5,6} )
+DISTUTILS_OPTIONAL=1
+
+inherit autotools bash-completion-r1 distutils-r1 linux-info versionator flag-o-matic systemd readme.gentoo-r1
+DESCRIPTION="LinuX Containers userspace utilities"
+HOMEPAGE="https://linuxcontainers.org/"
+SRC_URI="https://linuxcontainers.org/downloads/lxc/${P}.tar.gz"
+
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
+
+LICENSE="LGPL-3"
+SLOT="0"
+IUSE="cgmanager examples lua python seccomp selinux"
+
+RDEPEND="
+	net-libs/gnutls
+	sys-libs/libcap
+	cgmanager? ( app-admin/cgmanager )
+	lua? ( >=dev-lang/lua-5.1:= )
+	python? ( ${PYTHON_DEPS} )
+	seccomp? ( sys-libs/libseccomp )
+	selinux? ( sys-libs/libselinux )"
+
+DEPEND="${RDEPEND}
+	app-text/docbook-sgml-utils
+	>=sys-kernel/linux-headers-3.2"
+
+RDEPEND="${RDEPEND}
+	sys-apps/util-linux
+	app-misc/pax-utils
+	virtual/awk"
+
+CONFIG_CHECK="~CGROUPS ~CGROUP_DEVICE
+	~CPUSETS ~CGROUP_CPUACCT
+	~CGROUP_SCHED
+
+	~NAMESPACES
+	~IPC_NS ~USER_NS ~PID_NS
+
+	~NETLINK_DIAG ~PACKET_DIAG
+	~INET_UDP_DIAG ~INET_TCP_DIAG
+	~UNIX_DIAG ~CHECKPOINT_RESTORE
+
+	~CGROUP_FREEZER
+	~UTS_NS ~NET_NS
+	~VETH ~MACVLAN
+
+	~POSIX_MQUEUE
+	~!NETPRIO_CGROUP
+
+	~!GRKERNSEC_CHROOT_MOUNT
+	~!GRKERNSEC_CHROOT_DOUBLE
+	~!GRKERNSEC_CHROOT_PIVOT
+	~!GRKERNSEC_CHROOT_CHMOD
+	~!GRKERNSEC_CHROOT_CAPS
+	~!GRKERNSEC_PROC
+	~!GRKERNSEC_SYSFS_RESTRICT
+"
+
+ERROR_DEVPTS_MULTIPLE_INSTANCES="CONFIG_DEVPTS_MULTIPLE_INSTANCES:  needed for pts inside container"
+
+ERROR_CGROUP_FREEZER="CONFIG_CGROUP_FREEZER:  needed to freeze containers"
+
+ERROR_UTS_NS="CONFIG_UTS_NS:  needed to unshare hostnames and uname info"
+ERROR_NET_NS="CONFIG_NET_NS:  needed for unshared network"
+
+ERROR_VETH="CONFIG_VETH:  needed for internal (host-to-container) networking"
+ERROR_MACVLAN="CONFIG_MACVLAN:  needed for internal (inter-container) networking"
+
+ERROR_NETLINK_DIAG="CONFIG_NETLINK_DIAG:  needed for lxc-checkpoint"
+ERROR_PACKET_DIAG="CONFIG_PACKET_DIAG:  needed for lxc-checkpoint"
+ERROR_INET_UDP_DIAG="CONFIG_INET_UDP_DIAG:  needed for lxc-checkpoint"
+ERROR_INET_TCP_DIAG="CONFIG_INET_TCP_DIAG:  needed for lxc-checkpoint"
+ERROR_UNIX_DIAG="CONFIG_UNIX_DIAG:  needed for lxc-checkpoint"
+ERROR_CHECKPOINT_RESTORE="CONFIG_CHECKPOINT_RESTORE:  needed for lxc-checkpoint"
+
+ERROR_POSIX_MQUEUE="CONFIG_POSIX_MQUEUE:  needed for lxc-execute command"
+
+ERROR_NETPRIO_CGROUP="CONFIG_NETPRIO_CGROUP:  as of kernel 3.3 and lxc 0.8.0_rc1 this causes LXCs to fail booting."
+
+ERROR_GRKERNSEC_CHROOT_MOUNT="CONFIG_GRKERNSEC_CHROOT_MOUNT:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_DOUBLE="CONFIG_GRKERNSEC_CHROOT_DOUBLE:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_PIVOT="CONFIG_GRKERNSEC_CHROOT_PIVOT:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_CHMOD="CONFIG_GRKERNSEC_CHROOT_CHMOD:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_CAPS="CONFIG_GRKERNSEC_CHROOT_CAPS:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_PROC="CONFIG_GRKERNSEC_PROC:  this GRSEC feature is incompatible with unprivileged containers"
+ERROR_GRKERNSEC_SYSFS_RESTRICT="CONFIG_GRKERNSEC_SYSFS_RESTRICT:  this GRSEC feature is incompatible with unprivileged containers"
+
+DOCS=(AUTHORS CONTRIBUTING MAINTAINERS NEWS README doc/FAQ.txt)
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+pkg_setup() {
+	kernel_is -lt 4 7 && CONFIG_CHECK="${CONFIG_CHECK} ~DEVPTS_MULTIPLE_INSTANCES"
+	linux-info_pkg_setup
+}
+
+src_prepare() {
+	eapply "${FILESDIR}"/${PN}-2.0.6-bash-completion.patch
+	#558854
+	eapply "${FILESDIR}"/${PN}-2.0.5-omit-sysconfig.patch
+	eapply "${FILESDIR}"/${PN}-2.1.1-fix-cgroup2-detection.patch
+	eapply "${FILESDIR}"/${PN}-2.1.1-cgroups-enable-container-without-CAP_SYS_ADMIN.patch
+	eapply "${FILESDIR}"/${PN}-2.1.1-cve-2018-6556.patch
+	eapply_user
+	eautoreconf
+}
+
+src_configure() {
+	append-flags -fno-strict-aliasing
+
+	if use python; then
+		#541932
+		python_setup "python3*"
+		export PKG_CONFIG_PATH="${T}/${EPYTHON}/pkgconfig:${PKG_CONFIG_PATH}"
+	fi
+
+	# I am not sure about the --with-rootfs-path
+	# /var/lib/lxc is probably more appropriate than
+	# /usr/lib/lxc.
+	# Note by holgersson: Why is apparmor disabled?
+
+	# --enable-doc is for manpages which is why we don't link it to a "doc"
+	# USE flag. We always want man pages.
+	econf \
+		--localstatedir=/var \
+		--bindir=/usr/bin \
+		--sbindir=/usr/bin \
+		--with-config-path=/var/lib/lxc	\
+		--with-rootfs-path=/var/lib/lxc/rootfs \
+		--with-distro=gentoo \
+		--with-runtime-path=/run \
+		--disable-apparmor \
+		--disable-werror \
+		--enable-doc \
+		$(use_enable cgmanager) \
+		$(use_enable examples) \
+		$(use_enable lua) \
+		$(use_enable python) \
+		$(use_enable seccomp) \
+		$(use_enable selinux)
+}
+
+python_compile() {
+	distutils-r1_python_compile build_ext -I.. -L../lxc/.libs --no-pkg-config
+}
+
+src_compile() {
+	default
+
+	if use python; then
+		pushd "${S}/src/python-${PN}" > /dev/null
+		distutils-r1_src_compile
+		popd > /dev/null
+	fi
+}
+
+src_install() {
+	default
+
+	mv "${ED}"/usr/share/bash-completion/completions/${PN} "${ED}"/$(get_bashcompdir)/${PN}-start || die
+	# start-ephemeral is no longer a command but removing it here
+	# generates QA warnings (still in upstream completion script)
+	bashcomp_alias ${PN}-start \
+		${PN}-{attach,cgroup,copy,console,create,destroy,device,execute,freeze,info,monitor,snapshot,start-ephemeral,stop,unfreeze,wait}
+
+	if use python; then
+		pushd "${S}/src/python-lxc" > /dev/null
+		# Unset DOCS. This has been handled by the default target
+		unset DOCS
+		distutils-r1_src_install
+		popd > /dev/null
+	fi
+
+	keepdir /etc/lxc /var/lib/lxc/rootfs /var/log/lxc
+
+	find "${D}" -name '*.la' -delete
+
+	# Gentoo-specific additions!
+	newinitd "${FILESDIR}/${PN}.initd.7" ${PN}
+
+	# Remember to compare our systemd unit file with the upstream one
+	# config/init/systemd/lxc.service.in
+	systemd_newunit "${FILESDIR}"/${PN}_at.service.4 "lxc@.service"
+
+	DOC_CONTENTS="
+	Starting from version ${PN}-1.1.0-r3, the default lxc path has been
+	moved from /etc/lxc to /var/lib/lxc. If you still want to use /etc/lxc
+	please add the following to your /etc/lxc/lxc.conf
+
+	  lxc.lxcpath = /etc/lxc
+
+	For openrc, there is an init script provided with the package.
+	You _should_ only need to symlink /etc/init.d/lxc to
+	/etc/init.d/lxc.configname to start the container defined in
+	/etc/lxc/configname.conf.
+
+	Correspondingly, for systemd a service file lxc@.service is installed.
+	Enable and start lxc@configname in order to start the container defined
+	in /etc/lxc/configname.conf.
+
+	If you want checkpoint/restore functionality, please install criu
+	(sys-process/criu)."
+	DISABLE_AUTOFORMATTING=true
+	readme.gentoo_create_doc
+}
+
+pkg_postinst() {
+	readme.gentoo_print_elog
+}
diff --git a/app-emulation/lxc/lxc-3.0.1-r1.ebuild b/app-emulation/lxc/lxc-3.0.1-r1.ebuild
new file mode 100644
index 000000000000..be0d3a86f258
--- /dev/null
+++ b/app-emulation/lxc/lxc-3.0.1-r1.ebuild
@@ -0,0 +1,163 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit autotools bash-completion-r1 linux-info flag-o-matic systemd readme.gentoo-r1 pam
+
+DESCRIPTION="LinuX Containers userspace utilities"
+HOMEPAGE="https://linuxcontainers.org/"
+SRC_URI="https://linuxcontainers.org/downloads/lxc/${P}.tar.gz"
+
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
+
+LICENSE="LGPL-3"
+SLOT="0"
+IUSE="examples pam python seccomp selinux +templates"
+
+RDEPEND="
+	net-libs/gnutls
+	sys-libs/libcap
+	pam? ( virtual/pam )
+	seccomp? ( sys-libs/libseccomp )
+	selinux? ( sys-libs/libselinux )"
+
+DEPEND="${RDEPEND}
+	>=app-text/docbook-sgml-utils-0.6.14-r2
+	>=sys-kernel/linux-headers-3.2"
+
+RDEPEND="${RDEPEND}
+	sys-apps/util-linux
+	app-misc/pax-utils
+	virtual/awk"
+
+PDEPEND="templates? ( app-emulation/lxc-templates )
+	python? ( dev-python/python3-lxc )"
+
+CONFIG_CHECK="~CGROUPS ~CGROUP_DEVICE
+	~CPUSETS ~CGROUP_CPUACCT
+	~CGROUP_SCHED
+
+	~NAMESPACES
+	~IPC_NS ~USER_NS ~PID_NS
+
+	~CGROUP_FREEZER
+	~UTS_NS ~NET_NS
+	~VETH ~MACVLAN
+
+	~POSIX_MQUEUE
+	~!NETPRIO_CGROUP
+
+	~!GRKERNSEC_CHROOT_MOUNT
+	~!GRKERNSEC_CHROOT_DOUBLE
+	~!GRKERNSEC_CHROOT_PIVOT
+	~!GRKERNSEC_CHROOT_CHMOD
+	~!GRKERNSEC_CHROOT_CAPS
+	~!GRKERNSEC_PROC
+	~!GRKERNSEC_SYSFS_RESTRICT
+"
+
+ERROR_DEVPTS_MULTIPLE_INSTANCES="CONFIG_DEVPTS_MULTIPLE_INSTANCES:  needed for pts inside container"
+
+ERROR_CGROUP_FREEZER="CONFIG_CGROUP_FREEZER:  needed to freeze containers"
+
+ERROR_UTS_NS="CONFIG_UTS_NS:  needed to unshare hostnames and uname info"
+ERROR_NET_NS="CONFIG_NET_NS:  needed for unshared network"
+
+ERROR_VETH="CONFIG_VETH:  needed for internal (host-to-container) networking"
+ERROR_MACVLAN="CONFIG_MACVLAN:  needed for internal (inter-container) networking"
+
+ERROR_POSIX_MQUEUE="CONFIG_POSIX_MQUEUE:  needed for lxc-execute command"
+
+ERROR_NETPRIO_CGROUP="CONFIG_NETPRIO_CGROUP:  as of kernel 3.3 and lxc 0.8.0_rc1 this causes LXCs to fail booting."
+
+ERROR_GRKERNSEC_CHROOT_MOUNT="CONFIG_GRKERNSEC_CHROOT_MOUNT:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_DOUBLE="CONFIG_GRKERNSEC_CHROOT_DOUBLE:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_PIVOT="CONFIG_GRKERNSEC_CHROOT_PIVOT:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_CHMOD="CONFIG_GRKERNSEC_CHROOT_CHMOD:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_CHROOT_CAPS="CONFIG_GRKERNSEC_CHROOT_CAPS:  some GRSEC features make LXC unusable see postinst notes"
+ERROR_GRKERNSEC_PROC="CONFIG_GRKERNSEC_PROC:  this GRSEC feature is incompatible with unprivileged containers"
+ERROR_GRKERNSEC_SYSFS_RESTRICT="CONFIG_GRKERNSEC_SYSFS_RESTRICT:  this GRSEC feature is incompatible with unprivileged containers"
+
+DOCS=(AUTHORS CONTRIBUTING MAINTAINERS NEWS README doc/FAQ.txt)
+
+pkg_setup() {
+	kernel_is -lt 4 7 && CONFIG_CHECK="${CONFIG_CHECK} ~DEVPTS_MULTIPLE_INSTANCES"
+	linux-info_pkg_setup
+}
+
+src_prepare() {
+	eapply "${FILESDIR}"/${PN}-3.0.0-bash-completion.patch
+	#558854
+	eapply "${FILESDIR}"/${PN}-2.0.5-omit-sysconfig.patch
+	eapply "${FILESDIR}"/${PN}-3.0.1-cve-2018-6556.patch
+	eapply_user
+	eautoreconf
+}
+
+src_configure() {
+	append-flags -fno-strict-aliasing
+
+	# I am not sure about the --with-rootfs-path
+	# /var/lib/lxc is probably more appropriate than
+	# /usr/lib/lxc.
+	# Note by holgersson: Why is apparmor disabled?
+
+	# --enable-doc is for manpages which is why we don't link it to a "doc"
+	# USE flag. We always want man pages.
+	econf \
+		--localstatedir=/var \
+		--bindir=/usr/bin \
+		--sbindir=/usr/bin \
+		--with-config-path=/var/lib/lxc	\
+		--with-rootfs-path=/var/lib/lxc/rootfs \
+		--with-distro=gentoo \
+		--with-runtime-path=/run \
+		--disable-apparmor \
+		--disable-werror \
+		--enable-doc \
+		$(use_enable examples) \
+		$(use_enable pam) \
+		$(use_with pam pamdir $(getpam_mod_dir)) \
+		$(use_enable seccomp) \
+		$(use_enable selinux)
+}
+
+src_install() {
+	default
+
+	mv "${ED}"/usr/share/bash-completion/completions/${PN} "${ED}"/$(get_bashcompdir)/${PN}-start || die
+	bashcomp_alias ${PN}-start \
+		${PN}-{attach,cgroup,copy,console,create,destroy,device,execute,freeze,info,monitor,snapshot,stop,unfreeze,wait}
+
+	keepdir /etc/lxc /var/lib/lxc/rootfs /var/log/lxc
+	rmdir "${D}"/var/cache/lxc "${D}"/var/cache || die "rmdir failed"
+
+	find "${D}" -name '*.la' -delete
+
+	# Gentoo-specific additions!
+	newinitd "${FILESDIR}/${PN}.initd.7" ${PN}
+
+	# Remember to compare our systemd unit file with the upstream one
+	# config/init/systemd/lxc.service.in
+	systemd_newunit "${FILESDIR}"/${PN}_at.service.4 "lxc@.service"
+
+	DOC_CONTENTS="
+	For openrc, there is an init script provided with the package.
+	You _should_ only need to symlink /etc/init.d/lxc to
+	/etc/init.d/lxc.configname to start the container defined in
+	/etc/lxc/configname.conf.
+
+	Correspondingly, for systemd a service file lxc@.service is installed.
+	Enable and start lxc@configname in order to start the container defined
+	in /etc/lxc/configname.conf.
+
+	If you want checkpoint/restore functionality, please install criu
+	(sys-process/criu)."
+	DISABLE_AUTOFORMATTING=true
+	readme.gentoo_create_doc
+}
+
+pkg_postinst() {
+	readme.gentoo_print_elog
+}