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  • Committer: Teddy Hogeborn
  • Date: 2016-03-17 20:40:55 UTC
  • 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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Makefile
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# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
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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=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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        -fsanitize=bounds -fsanitize=alignment \
 
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        -fsanitize=object-size -fsanitize=float-divide-by-zero \
 
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        -fsanitize=float-cast-overflow -fsanitize=nonnull-attribute \
 
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        -fsanitize=returns-nonnull-attribute -fsanitize=bool \
 
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        -fsanitize=enum
 
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# Check which sanitizing options can be used
 
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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
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LINK_FORTIFY=
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endif
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#COVERAGE=--coverage
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OPTIMIZE=-Os -fno-strict-aliasing
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LANGUAGE=-std=gnu99
 
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LANGUAGE=-std=gnu11
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htmldir=man
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version=1.6.5
 
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version=1.7.6
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SED=sed
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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 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=$(DESTDIR)/usr/local
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GPGME_CFLAGS=$(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)
 
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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) $(COVERAGE) $(OPTIMIZE) \
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        $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) \
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        -DVERSION='"$(version)"'
 
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CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(SANITIZE) $(COVERAGE) \
 
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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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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
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CPROGS=plugin-runner $(PLUGINS)
 
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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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        $(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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        $(LINK.c) $(LIBNL3_CFLAGS) $^ $(LIBNL3_LIBS) $(strip\
 
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                ) $(LOADLIBES) $(LDLIBS) -o $@
 
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.PHONY : all doc html clean distclean mostlyclean maintainer-clean \
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        check run-client run-server install install-html \
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        install-server install-client-nokey install-client uninstall \
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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: setuid: Operation not permitted             #"
 
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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: setuid: Operation not permitted             #"
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        @echo "#                     seteuid: Operation not permitted            #"
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        @echo "#                     klogctl: Operation not permitted            #"
 
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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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# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
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        ./plugin-runner --plugin-dir=plugins.d \
 
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                --plugin-helper-dir=plugin-helpers \
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                --config-file=plugin-runner.conf \
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                --options-for=mandos-client:--seckey=keydir/seckey.txt,--pubkey=keydir/pubkey.txt,--network-hook-dir=network-hooks.d \
 
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                --env-for=mandos-client:GNOME_KEYRING_CONTROL= \
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                $(CLIENTARGS)
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# Used by run-client
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        install --directory confdir
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        install --mode=u=rw $< $@
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# Add a client password
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        ./mandos-keygen --dir keydir --password >> $@
 
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        ./mandos-keygen --dir keydir --password --no-ssh >> $@
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statedir:
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        install --directory statedir
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install-client-nokey: all doc
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        install --directory $(LIBDIR)/mandos $(CONFDIR)
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        install --directory --mode=u=rwx $(KEYDIR) \
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                $(LIBDIR)/mandos/plugins.d
 
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                $(LIBDIR)/mandos/plugins.d \
 
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                $(LIBDIR)/mandos/plugin-helpers
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        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
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                install --mode=u=rwx \
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                        --directory "$(CONFDIR)/plugins.d"; \
 
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                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
 
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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 \
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                $(INITRAMFSTOOLS)/hooks/mandos
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        install --mode=u=rw,go=r initramfs-tools-hook-conf \