sys-apps/shadow: backport upstream patch for crash

Also throw in a configure typo patch, given we're calling eautoreconf anyway.

Signed-off-by: Sam James <sam@gentoo.org>

3 files changed, 305 insertions, 0 deletions

diff --git a/sys-apps/shadow/files/shadow-4.9-configure-typo.patch b/sys-apps/shadow/files/shadow-4.9-configure-typo.patch
new file mode 100644
index 000000000000..1a6db304a013
--- /dev/null
+++ b/sys-apps/shadow/files/shadow-4.9-configure-typo.patch
@@ -0,0 +1,19 @@
+https://github.com/shadow-maint/shadow/commit/049f9a7f6b320c728a6274299041e360381d7cd5
+
+From 049f9a7f6b320c728a6274299041e360381d7cd5 Mon Sep 17 00:00:00 2001
+From: Andy Zaugg <andy.zaugg@gmail.com>
+Date: Tue, 21 Sep 2021 21:51:10 -0700
+Subject: [PATCH] Fix parentheses in configure.ac
+
+Resolving issue https://github.com/shadow-maint/shadow/issues/419
+--- a/configure.ac
++++ b/configure.ac
+@@ -345,7 +345,7 @@ if test "$with_sssd" = "yes"; then
+ 	              [AC_MSG_ERROR([posix_spawn is needed for sssd support])])
+ fi
+ 
+-AS_IF([test "$with_su" != "no"], AC_DEFINE(WITH_SU, 1, [Build with su])])
++AS_IF([test "$with_su" != "no"], AC_DEFINE(WITH_SU, 1, [Build with su]))
+ AM_CONDITIONAL([WITH_SU], [test "x$with_su" != "xno"])
+ 
+ dnl Check for some functions in libc first, only if not found check for
diff --git a/sys-apps/shadow/files/shadow-4.9-gpasswd-double-free.patch b/sys-apps/shadow/files/shadow-4.9-gpasswd-double-free.patch
new file mode 100644
index 000000000000..d7102ce03c32
--- /dev/null
+++ b/sys-apps/shadow/files/shadow-4.9-gpasswd-double-free.patch
@@ -0,0 +1,35 @@
+https://github.com/shadow-maint/shadow/commit/117bc66c6f95fa85ca75ecfdb8fbd3615deca0b6
+
+From 117bc66c6f95fa85ca75ecfdb8fbd3615deca0b6 Mon Sep 17 00:00:00 2001
+From: Michael Vetter <jubalh@iodoru.org>
+Date: Mon, 20 Sep 2021 11:04:50 +0200
+Subject: [PATCH] Only free sgent if it was initialized
+
+`sgent` is only initialized in `get_group()` if `is_shadowgrp` is true.
+So we should also only attempt to free it if this is actually the case.
+
+Can otherwise lead to:
+```
+free() double free detected in tcache 2 (gpasswd)
+```
+--- a/src/gpasswd.c
++++ b/src/gpasswd.c
+@@ -1207,11 +1207,13 @@ int main (int argc, char **argv)
+ 	sssd_flush_cache (SSSD_DB_GROUP);
+ 
+ #ifdef SHADOWGRP
+-	if (sgent.sg_adm) {
+-		xfree(sgent.sg_adm);
+-	}
+-	if (sgent.sg_mem) {
+-		xfree(sgent.sg_mem);
++	if (is_shadowgrp) {
++		if (sgent.sg_adm) {
++			xfree(sgent.sg_adm);
++		}
++		if (sgent.sg_mem) {
++			xfree(sgent.sg_mem);
++		}
+ 	}
+ #endif
+ 	if (grent.gr_mem) {
diff --git a/sys-apps/shadow/shadow-4.9-r4.ebuild b/sys-apps/shadow/shadow-4.9-r4.ebuild
new file mode 100644
index 000000000000..044718eed4c1
--- /dev/null
+++ b/sys-apps/shadow/shadow-4.9-r4.ebuild
@@ -0,0 +1,251 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools pam
+
+DESCRIPTION="Utilities to deal with user accounts"
+HOMEPAGE="https://github.com/shadow-maint/shadow"
+SRC_URI="https://github.com/shadow-maint/shadow/releases/download/v${PV}/${P}.tar.xz"
+
+LICENSE="BSD GPL-2"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+IUSE="acl audit bcrypt cracklib nls pam selinux skey split-usr +su xattr"
+# Taken from the man/Makefile.am file.
+LANGS=( cs da de es fi fr hu id it ja ko pl pt_BR ru sv tr zh_CN zh_TW )
+
+REQUIRED_USE="?? ( cracklib pam )"
+
+BDEPEND="
+	app-arch/xz-utils
+	sys-devel/gettext
+"
+COMMON_DEPEND="
+	virtual/libcrypt:=
+	acl? ( sys-apps/acl:0= )
+	audit? ( >=sys-process/audit-2.6:0= )
+	cracklib? ( >=sys-libs/cracklib-2.7-r3:0= )
+	nls? ( virtual/libintl )
+	pam? ( sys-libs/pam:0= )
+	skey? ( sys-auth/skey:0= )
+	selinux? (
+		>=sys-libs/libselinux-1.28:0=
+		sys-libs/libsemanage:0=
+	)
+	xattr? ( sys-apps/attr:0= )
+"
+DEPEND="${COMMON_DEPEND}
+	>=sys-kernel/linux-headers-4.14
+"
+RDEPEND="${COMMON_DEPEND}
+	!<sys-apps/man-pages-5.11-r1
+	!=sys-apps/man-pages-5.12-r0
+	!=sys-apps/man-pages-5.12-r1
+	nls? (
+		!<app-i18n/man-pages-it-5.06-r1
+		!<app-i18n/man-pages-ja-20180315-r1
+		!<app-i18n/man-pages-ru-5.03.2390.2390.20191017-r1
+	)
+	pam? ( >=sys-auth/pambase-20150213 )
+	su? ( !sys-apps/util-linux[su(-)] )
+"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-4.1.3-dots-in-usernames.patch"
+	"${FILESDIR}/${P}-libsubid_pam_linking.patch"
+	"${FILESDIR}/${P}-libsubid_oot_build.patch"
+	"${FILESDIR}/shadow-4.9-libcrack.patch"
+	"${FILESDIR}/shadow-4.9-SHA-rounds.patch"
+	"${FILESDIR}/${P}-gpasswd-double-free.patch"
+	"${FILESDIR}/${P}-configure-typo.patch"
+)
+
+src_prepare() {
+	default
+	eautoreconf
+	#elibtoolize
+}
+
+src_configure() {
+	local myeconfargs=(
+		--disable-account-tools-setuid
+		--with-btrfs
+		--without-group-name-max-length
+		--without-tcb
+		$(use_enable nls)
+		$(use_with acl)
+		$(use_with audit)
+		$(use_with bcrypt)
+		$(use_with cracklib libcrack)
+		$(use_with elibc_glibc nscd)
+		$(use_with pam libpam)
+		$(use_with selinux)
+		$(use_with skey)
+		$(use_with su)
+		$(use_with xattr attr)
+	)
+	econf "${myeconfargs[@]}"
+
+	has_version 'sys-libs/uclibc[-rpc]' && sed -i '/RLOGIN/d' config.h #425052
+
+	if use nls ; then
+		local l langs="po" # These are the pot files.
+		for l in ${LANGS[*]} ; do
+			has ${l} ${LINGUAS-${l}} && langs+=" ${l}"
+		done
+		sed -i "/^SUBDIRS = /s:=.*:= ${langs}:" man/Makefile || die
+	fi
+}
+
+set_login_opt() {
+	local comment="" opt=${1} val=${2}
+	if [[ -z ${val} ]]; then
+		comment="#"
+		sed -i \
+			-e "/^${opt}\>/s:^:#:" \
+			"${ED}"/etc/login.defs || die
+	else
+		sed -i -r \
+			-e "/^#?${opt}\>/s:.*:${opt} ${val}:" \
+			"${ED}"/etc/login.defs
+	fi
+	local res=$(grep "^${comment}${opt}\>" "${ED}"/etc/login.defs)
+	einfo "${res:-Unable to find ${opt} in /etc/login.defs}"
+}
+
+src_install() {
+	emake DESTDIR="${D}" suidperms=4711 install
+
+	# 4.9 regression: https://github.com/shadow-maint/shadow/issues/389
+	emake DESTDIR="${D}" -C man install
+
+	find "${ED}" -name '*.la' -type f -delete || die
+
+	insinto /etc
+	if ! use pam ; then
+		insopts -m0600
+		doins etc/login.access etc/limits
+	fi
+
+	# needed for 'useradd -D'
+	insinto /etc/default
+	insopts -m0600
+	doins "${FILESDIR}"/default/useradd
+
+	if use split-usr ; then
+		# move passwd to / to help recover broke systems #64441
+		# We cannot simply remove this or else net-misc/scponly
+		# and other tools will break because of hardcoded passwd
+		# location
+		dodir /bin
+		mv "${ED}"/usr/bin/passwd "${ED}"/bin/ || die
+		dosym ../../bin/passwd /usr/bin/passwd
+	fi
+
+	cd "${S}" || die
+	insinto /etc
+	insopts -m0644
+	newins etc/login.defs login.defs
+
+	set_login_opt CREATE_HOME yes
+	if ! use pam ; then
+		set_login_opt MAIL_CHECK_ENAB no
+		set_login_opt SU_WHEEL_ONLY yes
+		set_login_opt CRACKLIB_DICTPATH /usr/lib/cracklib_dict
+		set_login_opt LOGIN_RETRIES 3
+		set_login_opt ENCRYPT_METHOD SHA512
+		set_login_opt CONSOLE
+	else
+		dopamd "${FILESDIR}"/pam.d-include/shadow
+
+		for x in chsh shfn ; do
+			newpamd "${FILESDIR}"/pam.d-include/passwd ${x}
+		done
+
+		for x in chpasswd newusers ; do
+			newpamd "${FILESDIR}"/pam.d-include/chpasswd ${x}
+		done
+
+		newpamd "${FILESDIR}"/pam.d-include/shadow-r1 groupmems
+
+		# comment out login.defs options that pam hates
+		local opt sed_args=()
+		for opt in \
+			CHFN_AUTH \
+			CONSOLE \
+			CRACKLIB_DICTPATH \
+			ENV_HZ \
+			ENVIRON_FILE \
+			FAILLOG_ENAB \
+			FTMP_FILE \
+			LASTLOG_ENAB \
+			MAIL_CHECK_ENAB \
+			MOTD_FILE \
+			NOLOGINS_FILE \
+			OBSCURE_CHECKS_ENAB \
+			PASS_ALWAYS_WARN \
+			PASS_CHANGE_TRIES \
+			PASS_MIN_LEN \
+			PORTTIME_CHECKS_ENAB \
+			QUOTAS_ENAB \
+			SU_WHEEL_ONLY
+		do
+			set_login_opt ${opt}
+			sed_args+=( -e "/^#${opt}\>/b pamnote" )
+		done
+		sed -i "${sed_args[@]}" \
+			-e 'b exit' \
+			-e ': pamnote; i# NOTE: This setting should be configured via /etc/pam.d/ and not in this file.' \
+			-e ': exit' \
+			"${ED}"/etc/login.defs || die
+
+		# remove manpages that pam will install for us
+		# and/or don't apply when using pam
+		find "${ED}"/usr/share/man -type f \
+			'(' -name 'limits.5*' -o -name 'suauth.5*' ')' \
+			-delete
+
+		# Remove pam.d files provided by pambase.
+		rm "${ED}"/etc/pam.d/{login,passwd} || die
+		if use su ; then
+			rm "${ED}"/etc/pam.d/su || die
+		fi
+	fi
+
+	# Remove manpages that are handled by other packages
+	find "${ED}"/usr/share/man -type f \
+		'(' -name id.1 -o -name getspnam.3 ')' \
+		-delete
+
+	cd "${S}" || die
+	dodoc ChangeLog NEWS TODO
+	newdoc README README.download
+	cd doc || die
+	dodoc HOWTO README* WISHLIST *.txt
+}
+
+pkg_preinst() {
+	rm -f "${EROOT}"/etc/pam.d/system-auth.new \
+		"${EROOT}/etc/login.defs.new"
+}
+
+pkg_postinst() {
+	# Enable shadow groups.
+	if [ ! -f "${EROOT}"/etc/gshadow ] ; then
+		if grpck -r -R "${EROOT}" 2>/dev/null ; then
+			grpconv -R "${EROOT}"
+		else
+			ewarn "Running 'grpck' returned errors.  Please run it by hand, and then"
+			ewarn "run 'grpconv' afterwards!"
+		fi
+	fi
+
+	[[ ! -f "${EROOT}"/etc/subgid ]] &&
+		touch "${EROOT}"/etc/subgid
+	[[ ! -f "${EROOT}"/etc/subuid ]] &&
+		touch "${EROOT}"/etc/subuid
+
+	einfo "The 'adduser' symlink to 'useradd' has been dropped."
+}