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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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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 \
2
2
        -Wmissing-include-dirs -Wswitch-default -Wswitch-enum \
3
3
        -Wunused -Wuninitialized -Wstrict-overflow=5 \
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        -Wsuggest-attribute=pure -Wsuggest-attribute=const \
10
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        -Wmissing-format-attribute -Wnormalized=nfc -Wpacked \
11
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        -Wredundant-decls -Wnested-externs -Winline -Wvla \
12
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        -Wvolatile-register-var -Woverlength-strings
13
 
#DEBUG:=-ggdb3 -fsanitize=address 
 
13
#DEBUG=-ggdb3
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# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
15
 
# and <https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
16
 
FORTIFY:=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
 
15
# 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/>
18
 
ALL_SANITIZE_OPTIONS:=-fsanitize=leak -fsanitize=undefined \
 
18
ALL_SANITIZE_OPTIONS:=-fsanitize=address -fsanitize=undefined \
19
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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)))
31
 
LINK_FORTIFY_LD:=-z relro -z now
32
 
LINK_FORTIFY:=
 
31
LINK_FORTIFY_LD=-z relro -z now
 
32
LINK_FORTIFY=
33
33
 
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# If BROKEN_PIE is set, do not build with -pie
35
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ifndef BROKEN_PIE
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LINK_FORTIFY += -pie
38
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endif
39
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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
 
40
OPTIMIZE=-Os -fno-strict-aliasing
 
41
LANGUAGE=-std=gnu11
 
42
htmldir=man
 
43
version=1.7.6
 
44
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)))
 
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)))
48
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## Use these settings for a traditional /usr/local install
50
 
# PREFIX:=$(DESTDIR)/usr/local
51
 
# CONFDIR:=$(DESTDIR)/etc/mandos
52
 
# KEYDIR:=$(DESTDIR)/etc/mandos/keys
53
 
# MANDIR:=$(PREFIX)/man
54
 
# INITRAMFSTOOLS:=$(DESTDIR)/etc/initramfs-tools
55
 
# STATEDIR:=$(DESTDIR)/var/lib/mandos
56
 
# 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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##
58
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## These settings are for a package-type install
60
 
PREFIX:=$(DESTDIR)/usr
61
 
CONFDIR:=$(DESTDIR)/etc/mandos
62
 
KEYDIR:=$(DESTDIR)/etc/keys/mandos
63
 
MANDIR:=$(PREFIX)/share/man
64
 
INITRAMFSTOOLS:=$(DESTDIR)/usr/share/initramfs-tools
65
 
STATEDIR:=$(DESTDIR)/var/lib/mandos
66
 
LIBDIR:=$(shell \
 
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PREFIX=$(DESTDIR)/usr
 
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CONFDIR=$(DESTDIR)/etc/mandos
 
62
KEYDIR=$(DESTDIR)/etc/keys/mandos
 
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MANDIR=$(PREFIX)/share/man
 
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INITRAMFSTOOLS=$(DESTDIR)/usr/share/initramfs-tools
 
65
STATEDIR=$(DESTDIR)/var/lib/mandos
 
66
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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##
76
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77
 
SYSTEMD:=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
78
 
TMPFILES:=$(DESTDIR)$(shell pkg-config systemd --variable=tmpfilesdir)
 
77
SYSTEMD=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
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80
 
GNUTLS_CFLAGS:=$(shell pkg-config --cflags-only-I gnutls)
81
 
GNUTLS_LIBS:=$(shell pkg-config --libs gnutls)
82
 
AVAHI_CFLAGS:=$(shell pkg-config --cflags-only-I avahi-core)
83
 
AVAHI_LIBS:=$(shell pkg-config --libs avahi-core)
84
 
GPGME_CFLAGS:=$(shell gpgme-config --cflags; getconf LFS_CFLAGS)
85
 
GPGME_LIBS:=$(shell gpgme-config --libs; getconf LFS_LIBS; \
 
79
GNUTLS_CFLAGS=$(shell pkg-config --cflags-only-I gnutls)
 
80
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)
 
83
GPGME_CFLAGS=$(shell gpgme-config --cflags; getconf LFS_CFLAGS)
 
84
GPGME_LIBS=$(shell gpgme-config --libs; getconf LFS_LIBS; \
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        getconf LFS_LDFLAGS)
87
 
LIBNL3_CFLAGS:=$(shell pkg-config --cflags-only-I libnl-route-3.0)
88
 
LIBNL3_LIBS:=$(shell pkg-config --libs libnl-route-3.0)
 
86
LIBNL3_CFLAGS=$(shell pkg-config --cflags-only-I libnl-route-3.0)
 
87
LIBNL3_LIBS=$(shell pkg-config --libs libnl-route-3.0)
89
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90
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# Do not change these two
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CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(SANITIZE) $(COVERAGE) \
92
 
        $(OPTIMIZE) $(LANGUAGE) -DVERSION='"$(version)"'
 
91
        $(OPTIMIZE) $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) \
 
92
        $(GPGME_CFLAGS) -DVERSION='"$(version)"'
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LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
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95
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# Commands to format a DocBook <refentry> document into a manual page
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116
        /usr/share/xml/docbook/stylesheet/nwalsh/xhtml/docbook.xsl \
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        $<; $(HTMLPOST) $@)
118
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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 \
 
122
PLUGINS=plugins.d/password-prompt plugins.d/mandos-client \
123
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        plugins.d/usplash plugins.d/splashy plugins.d/askpass-fifo \
124
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        plugins.d/plymouth
125
 
PLUGIN_HELPERS:=plugin-helpers/mandos-client-iprouteadddel
126
 
CPROGS:=plugin-runner $(PLUGINS) $(PLUGIN_HELPERS)
127
 
PROGS:=mandos mandos-keygen mandos-ctl mandos-monitor $(CPROGS)
128
 
DOCS:=mandos.8 mandos-keygen.8 mandos-monitor.8 mandos-ctl.8 \
 
125
PLUGIN_HELPERS=plugin-helpers/mandos-client-iprouteadddel
 
126
CPROGS=plugin-runner $(PLUGINS) $(PLUGIN_HELPERS)
 
127
PROGS=mandos mandos-keygen mandos-ctl mandos-monitor $(CPROGS)
 
128
DOCS=mandos.8 mandos-keygen.8 mandos-monitor.8 mandos-ctl.8 \
129
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        mandos.conf.5 mandos-clients.conf.5 plugin-runner.8mandos \
130
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        plugins.d/mandos-client.8mandos \
131
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        plugins.d/password-prompt.8mandos plugins.d/usplash.8mandos \
132
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        plugins.d/splashy.8mandos plugins.d/askpass-fifo.8mandos \
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        plugins.d/plymouth.8mandos intro.8mandos
134
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135
 
htmldocs:=$(addsuffix .xhtml,$(DOCS))
 
135
htmldocs=$(addsuffix .xhtml,$(DOCS))
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137
 
objects:=$(addsuffix .o,$(CPROGS))
 
137
objects=$(addsuffix .o,$(CPROGS))
138
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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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255
 
# 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\
259
 
        ) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) $(strip\
260
 
                ) $(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     #"
290
 
        @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 *      #"
297
 
        @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  #"
300
 
        @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
347
 
        if [ "$(TMPFILES)" != "$(DESTDIR)" -a -d "$(TMPFILES)" ]; then \
348
 
                install --mode=u=rw,go=r tmpfiles.d-mandos.conf \
349
 
                        $(TMPFILES)/mandos.conf; \
350
 
        fi
351
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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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                $(LIBDIR)/mandos/plugin-helpers
390
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        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
391
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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 "$(CONFDIR)/plugin-helpers"; \
394
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        fi
395
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        install --mode=u=rwx,go=rx --directory \
396
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                "$(CONFDIR)/network-hooks.d"
397
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        install --mode=u=rwx,go=rx \
398
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                --target-directory=$(LIBDIR)/mandos plugin-runner
399
 
        install --mode=u=rwx,go=rx \
400
 
                --target-directory=$(LIBDIR)/mandos mandos-to-cryptroot-unlock
401
388
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
402
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                mandos-keygen
403
390
        install --mode=u=rwx,go=rx \
418
405
        install --mode=u=rwxs,go=rx \
419
406
                --target-directory=$(LIBDIR)/mandos/plugins.d \
420
407
                plugins.d/plymouth
421
 
        install --mode=u=rwx,go=rx \
 
408
        install --mode=u=rwxs,go=rx \
422
409
                --target-directory=$(LIBDIR)/mandos/plugin-helpers \
423
410
                plugin-helpers/mandos-client-iprouteadddel
424
411
        install initramfs-tools-hook \
425
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                $(INITRAMFSTOOLS)/hooks/mandos
426
 
        install --mode=u=rw,go=r initramfs-tools-conf \
427
 
                $(INITRAMFSTOOLS)/conf.d/mandos-conf
 
413
        install --mode=u=rw,go=r initramfs-tools-hook-conf \
 
414
                $(INITRAMFSTOOLS)/conf-hooks.d/mandos
428
415
        install initramfs-tools-script \
429
416
                $(INITRAMFSTOOLS)/scripts/init-premount/mandos
430
 
        install initramfs-tools-script-stop \
431
 
                $(INITRAMFSTOOLS)/scripts/local-premount/mandos
432
417
        install --mode=u=rw,go=r plugin-runner.conf $(CONFDIR)
433
418
        gzip --best --to-stdout mandos-keygen.8 \
434
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                > $(MANDIR)/man8/mandos-keygen.8.gz