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  • Committer: Teddy Hogeborn
  • Date: 2016-03-17 20:40:55 UTC
  • mto: (237.7.594 trunk)
  • mto: This revision was merged to the branch mainline in revision 341.
  • Revision ID: teddy@recompile.se-20160317204055-bhsh5xsidq7w5cxu
Client: Fix plymouth agent; broken since 1.7.2.

Fix an very old memory bug in the plymouth agent (which has been
present since its apperance in version 1.2), but which was only
recently detected at run time due to the new -fsanitize=address
compile- time flag, which has been used since version 1.7.2.  This
detection of a memory access violation causes the program to abort,
making the Plymouth graphical boot system unable to accept interactive
input of passwords when using the Mandos client.

* plugins.d/plymouth.c (exec_and_wait): Fix memory allocation bug when
  allocating new_argv.  Also tolerate a zero-length argv.

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Lines of Context:
Makefile
1
 
WARN:=-O -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self \
 
1
WARN=-O -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self \
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        -Wmissing-include-dirs -Wswitch-default -Wswitch-enum \
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        -Wunused -Wuninitialized -Wstrict-overflow=5 \
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        -Wsuggest-attribute=pure -Wsuggest-attribute=const \
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        -Wmissing-format-attribute -Wnormalized=nfc -Wpacked \
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        -Wredundant-decls -Wnested-externs -Winline -Wvla \
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        -Wvolatile-register-var -Woverlength-strings
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#DEBUG:=-ggdb3 -fsanitize=address 
 
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#DEBUG=-ggdb3
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# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
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# and <https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
16
 
FORTIFY:=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
 
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# and <http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
 
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FORTIFY=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
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# <https://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/>
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ALL_SANITIZE_OPTIONS:=-fsanitize=leak -fsanitize=undefined \
 
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ALL_SANITIZE_OPTIONS:=-fsanitize=address -fsanitize=undefined \
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        -fsanitize=shift -fsanitize=integer-divide-by-zero \
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        -fsanitize=unreachable -fsanitize=vla-bound -fsanitize=null \
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        -fsanitize=return -fsanitize=signed-integer-overflow \
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SANITIZE:=$(foreach option,$(ALL_SANITIZE_OPTIONS),$(shell \
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        echo 'int main(){}' | $(CC) --language=c $(option) /dev/stdin \
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        -o /dev/null >/dev/null 2>&1 && echo $(option)))
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LINK_FORTIFY_LD:=-z relro -z now
32
 
LINK_FORTIFY:=
 
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LINK_FORTIFY_LD=-z relro -z now
 
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LINK_FORTIFY=
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# If BROKEN_PIE is set, do not build with -pie
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ifndef BROKEN_PIE
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LINK_FORTIFY += -pie
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endif
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#COVERAGE=--coverage
40
 
OPTIMIZE:=-Os -fno-strict-aliasing
41
 
LANGUAGE:=-std=gnu11
42
 
htmldir:=man
43
 
version:=1.7.19
44
 
SED:=sed
 
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OPTIMIZE=-Os -fno-strict-aliasing
 
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LANGUAGE=-std=gnu11
 
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htmldir=man
 
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version=1.7.6
 
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SED=sed
45
45
 
46
 
USER:=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
47
 
GROUP:=$(firstword $(subst :, ,$(shell getent group _mandos || getent group nogroup || echo 65534)))
 
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USER=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
 
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GROUP=$(firstword $(subst :, ,$(shell getent group _mandos || getent group nogroup || echo 65534)))
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## Use these settings for a traditional /usr/local install
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# PREFIX:=$(DESTDIR)/usr/local
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# CONFDIR:=$(DESTDIR)/etc/mandos
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# KEYDIR:=$(DESTDIR)/etc/mandos/keys
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# MANDIR:=$(PREFIX)/man
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# INITRAMFSTOOLS:=$(DESTDIR)/etc/initramfs-tools
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# STATEDIR:=$(DESTDIR)/var/lib/mandos
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# LIBDIR:=$(PREFIX)/lib
 
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# PREFIX=$(DESTDIR)/usr/local
 
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# CONFDIR=$(DESTDIR)/etc/mandos
 
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# KEYDIR=$(DESTDIR)/etc/mandos/keys
 
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# MANDIR=$(PREFIX)/man
 
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# INITRAMFSTOOLS=$(DESTDIR)/etc/initramfs-tools
 
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# STATEDIR=$(DESTDIR)/var/lib/mandos
 
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# LIBDIR=$(PREFIX)/lib
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##
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## These settings are for a package-type install
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PREFIX:=$(DESTDIR)/usr
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CONFDIR:=$(DESTDIR)/etc/mandos
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KEYDIR:=$(DESTDIR)/etc/keys/mandos
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MANDIR:=$(PREFIX)/share/man
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INITRAMFSTOOLS:=$(DESTDIR)/usr/share/initramfs-tools
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STATEDIR:=$(DESTDIR)/var/lib/mandos
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LIBDIR:=$(shell \
 
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PREFIX=$(DESTDIR)/usr
 
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CONFDIR=$(DESTDIR)/etc/mandos
 
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KEYDIR=$(DESTDIR)/etc/keys/mandos
 
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MANDIR=$(PREFIX)/share/man
 
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INITRAMFSTOOLS=$(DESTDIR)/usr/share/initramfs-tools
 
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STATEDIR=$(DESTDIR)/var/lib/mandos
 
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LIBDIR=$(shell \
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        for d in \
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        "/usr/lib/`dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null`" \
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        "`rpm --eval='%{_libdir}' 2>/dev/null`" /usr/lib; do \
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        done)
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##
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SYSTEMD:=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
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TMPFILES:=$(DESTDIR)$(shell pkg-config systemd --variable=tmpfilesdir)
 
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SYSTEMD=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
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GNUTLS_CFLAGS:=$(shell pkg-config --cflags-only-I gnutls)
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GNUTLS_LIBS:=$(shell pkg-config --libs gnutls)
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AVAHI_CFLAGS:=$(shell pkg-config --cflags-only-I avahi-core)
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AVAHI_LIBS:=$(shell pkg-config --libs avahi-core)
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GPGME_CFLAGS:=$(shell gpgme-config --cflags; getconf LFS_CFLAGS)
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GPGME_LIBS:=$(shell gpgme-config --libs; getconf LFS_LIBS; \
 
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GNUTLS_CFLAGS=$(shell pkg-config --cflags-only-I gnutls)
 
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GNUTLS_LIBS=$(shell pkg-config --libs gnutls)
 
81
AVAHI_CFLAGS=$(shell pkg-config --cflags-only-I avahi-core)
 
82
AVAHI_LIBS=$(shell pkg-config --libs avahi-core)
 
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GPGME_CFLAGS=$(shell gpgme-config --cflags; getconf LFS_CFLAGS)
 
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GPGME_LIBS=$(shell gpgme-config --libs; getconf LFS_LIBS; \
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        getconf LFS_LDFLAGS)
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LIBNL3_CFLAGS:=$(shell pkg-config --cflags-only-I libnl-route-3.0)
88
 
LIBNL3_LIBS:=$(shell pkg-config --libs libnl-route-3.0)
 
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LIBNL3_CFLAGS=$(shell pkg-config --cflags-only-I libnl-route-3.0)
 
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LIBNL3_LIBS=$(shell pkg-config --libs libnl-route-3.0)
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# Do not change these two
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CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(SANITIZE) $(COVERAGE) \
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        $(OPTIMIZE) $(LANGUAGE) -DVERSION='"$(version)"'
 
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        $(OPTIMIZE) $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) \
 
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        $(GPGME_CFLAGS) -DVERSION='"$(version)"'
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LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
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# Commands to format a DocBook <refentry> document into a manual page
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        /usr/share/xml/docbook/stylesheet/nwalsh/xhtml/docbook.xsl \
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        $<; $(HTMLPOST) $@)
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# Fix citerefentry links
119
 
HTMLPOST:=$(SED) --in-place \
 
119
HTMLPOST=$(SED) --in-place \
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        --expression='s/\(<a class="citerefentry" href="\)\("><span class="citerefentry"><span class="refentrytitle">\)\([^<]*\)\(<\/span>(\)\([^)]*\)\()<\/span><\/a>\)/\1\3.\5\2\3\4\5\6/g'
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122
 
PLUGINS:=plugins.d/password-prompt plugins.d/mandos-client \
 
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PLUGINS=plugins.d/password-prompt plugins.d/mandos-client \
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        plugins.d/usplash plugins.d/splashy plugins.d/askpass-fifo \
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        plugins.d/plymouth
125
 
PLUGIN_HELPERS:=plugin-helpers/mandos-client-iprouteadddel
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CPROGS:=plugin-runner $(PLUGINS) $(PLUGIN_HELPERS)
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PROGS:=mandos mandos-keygen mandos-ctl mandos-monitor $(CPROGS)
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DOCS:=mandos.8 mandos-keygen.8 mandos-monitor.8 mandos-ctl.8 \
 
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PLUGIN_HELPERS=plugin-helpers/mandos-client-iprouteadddel
 
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CPROGS=plugin-runner $(PLUGINS) $(PLUGIN_HELPERS)
 
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PROGS=mandos mandos-keygen mandos-ctl mandos-monitor $(CPROGS)
 
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DOCS=mandos.8 mandos-keygen.8 mandos-monitor.8 mandos-ctl.8 \
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        mandos.conf.5 mandos-clients.conf.5 plugin-runner.8mandos \
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        plugins.d/mandos-client.8mandos \
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        plugins.d/password-prompt.8mandos plugins.d/usplash.8mandos \
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        plugins.d/splashy.8mandos plugins.d/askpass-fifo.8mandos \
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        plugins.d/plymouth.8mandos intro.8mandos
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htmldocs:=$(addsuffix .xhtml,$(DOCS))
 
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htmldocs=$(addsuffix .xhtml,$(DOCS))
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objects:=$(addsuffix .o,$(CPROGS))
 
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objects=$(addsuffix .o,$(CPROGS))
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all: $(PROGS) mandos.lsm
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                --expression='s/\(mandos_\)[0-9.]\+\(\.orig\.tar\.gz\)/\1$(version)\2/' \
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                $@)
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# Need to add the GnuTLS, Avahi and GPGME libraries, and can't use
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# -fsanitize=leak because GnuTLS and GPGME both leak memory.
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plugins.d/mandos-client: plugins.d/mandos-client.c
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        $(CC) $(filter-out -fsanitize=leak,$(CFLAGS)) $(strip\
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        ) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) $(strip\
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                ) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH) $^ $(strip\
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                ) -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
 
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        $(LINK.c) $^ -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
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                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
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plugin-helpers/mandos-client-iprouteadddel: plugin-helpers/mandos-client-iprouteadddel.c
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run-client: all keydir/seckey.txt keydir/pubkey.txt
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        @echo "###################################################################"
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        @echo "# The following error messages are harmless and can be safely     #"
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        @echo "# ignored:                                                        #"
 
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        @echo "# ignored.  The messages are caused by not running as root, but   #"
 
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        @echo "# you should NOT run \"make run-client\" as root unless you also    #"
 
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        @echo "# unpacked and compiled Mandos as root, which is NOT recommended. #"
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        @echo "# From plugin-runner: setgid: Operation not permitted             #"
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        @echo "#                     setuid: Operation not permitted             #"
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        @echo "# From askpass-fifo:  mkfifo: Permission denied                   #"
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        @echo "# From mandos-client:                                             #"
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        @echo "#             Failed to raise privileges: Operation not permitted #"
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        @echo "#             Warning: network hook \"*\" exited with status *      #"
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        @echo "#                                                                 #"
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        @echo "# (The messages are caused by not running as root, but you should #"
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        @echo "# NOT run \"make run-client\" as root unless you also unpacked and  #"
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        @echo "# compiled Mandos as root, which is also NOT recommended.)        #"
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        @echo "###################################################################"
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# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
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        ./plugin-runner --plugin-dir=plugins.d \
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        elif install --directory --mode=u=rwx $(STATEDIR); then \
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                chown -- $(USER):$(GROUP) $(STATEDIR) || :; \
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        fi
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        if [ "$(TMPFILES)" != "$(DESTDIR)" -a -d "$(TMPFILES)" ]; then \
348
 
                install --mode=u=rw,go=r tmpfiles.d-mandos.conf \
349
 
                        $(TMPFILES)/mandos.conf; \
350
 
        fi
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        install --mode=u=rwx,go=rx mandos $(PREFIX)/sbin/mandos
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        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
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                mandos-ctl
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                $(LIBDIR)/mandos/plugin-helpers
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        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
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                install --mode=u=rwx \
392
 
                        --directory "$(CONFDIR)/plugins.d" \
393
 
                        "$(CONFDIR)/plugin-helpers"; \
 
381
                        --directory "$(CONFDIR)/plugins.d"; \
 
382
                install --directory "$(CONFDIR)/plugin-helpers"; \
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        fi
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        install --mode=u=rwx,go=rx --directory \
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                "$(CONFDIR)/network-hooks.d"
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        install --mode=u=rwxs,go=rx \
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                --target-directory=$(LIBDIR)/mandos/plugins.d \
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                plugins.d/plymouth
419
 
        install --mode=u=rwx,go=rx \
 
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        install --mode=u=rwxs,go=rx \
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                --target-directory=$(LIBDIR)/mandos/plugin-helpers \
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                plugin-helpers/mandos-client-iprouteadddel
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        install initramfs-tools-hook \