Bugzilla Bug 195886

If xorg-xserver has been built with the hal USE flag and is started while the
dbus service is not running, it crashes when shut down by exiting the wm or
pressing ctrl-alt-backspace. The console is unusable but the rest of the system
is not affected (e. g. remote login works).

When dbus is running, X shuts down properly. From the backtrace, I suspect that
the problem is in teardown() in xorg-server-1.4/config/dbus-core.c, but I have
not been able to test that in gdb.

Reproducible: Always

Steps to Reproduce:
1. Build x11-base/xorg-xserver-1.4.0-r2 with hal.
2. Stop dbus.
3. Run X.
4. Stop X.
Actual Results:  
X crashes on a segmentation fault.

Expected Results:  
X should shut down properly (or fail to start, if that is not possible).

Backtrace from Xorg.0.log:
0: X [0x80e9c66]
1: X(xf86SigHandler+0xa3) [0x80e9c12]
2: [0xb7fbd420]
3: X [0x80babd2]
4: X(config_dbus_core_fini+0xb) [0x80baf60]
5: X(config_fini+0x15) [0x80bab06]
6: X(main+0x766) [0x807484e]
7: /lib/libc.so.6(__libc_start_main+0xe3) [0xb7c87fd3]

Output of emerge --info:
Portage 2.1.3.12 (hardened/x86/2.6, gcc-4.2.2, glibc-2.6.1-r0,
2.6.22-hardened-r7 i686)
=================================================================
System uname: 2.6.22-hardened-r7 i686 Intel(R) Core(TM)2 CPU T5600 @ 1.83GHz
Timestamp of tree: Sun, 14 Oct 2007 18:50:01 +0000
app-shells/bash:     3.2_p17-r1
dev-java/java-config: 1.3.7, 2.1.1
dev-lang/python:     2.4.4-r4, 2.5.1-r2
dev-python/pycrypto: 2.0.1-r6
sys-apps/baselayout: 1.12.10-r5
sys-apps/sandbox:    1.2.18.1
sys-devel/autoconf:  2.13, 2.61-r1
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.18-r1
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool:   1.5.24
virtual/os-headers:  2.6.22-r2
ACCEPT_KEYWORDS="x86 ~x86"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-march=nocona -O0 -ggdb -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf
/etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/
/etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/splash /etc/terminfo
/etc/texmf/web2c /etc/udev/rules.d"
CXXFLAGS="-march=nocona -O0 -ggdb -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="candy collision-protect distlocks installsources metadata-transfer
nostrip parallel-fetch sandbox sfperms strict unmerge-orphans userfetch
userpriv usersandbox"
GENTOO_MIRRORS="http://213.186.33.37/gentoo-distfiles/"
LANG="en_GB.UTF-8"
LINGUAS="en_GB en en_US de fr es ru"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude=/distfiles --exclude=/local --exclude=/packages
--filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="3ds 7zip X X509 a52 aac aalib abook ace acl acpi additions aim alisp alsa
amr ansi apache2 arj artworkextra asf async audiofile auth bash-completion
bcmath berkdb bidi binfilter blender-game bluetooth bonusscripts boost bzip2
cairo cal3d calendar cardbus cddb cdparanoia chipcard chipcard2 chm cjk cli
colordiff cpudetection cracklib crypt cscope css ctype cups curl curlwrappers
dbase dbm dbus dbx devhelp dga dhcp dia divx djvu doc doomsday dri dts dv dvd
dvdnav dvdr dvdread eap-tls ecc effects emf enca encode erandom examples exif
extensions extrafilters fame fbcon fbsplash ffmpeg fftw figlet filter finger
firefox flac flash flatfile fltk fluidsynth foomaticdb fpx ftp fuse gcc-libffi
gcc64 gcj gconf gd gdbm geldkarte geoip ggi gif gimp gimpprint ginac glade glep
glgd glib glibc-omitfp glitz glut gmedia gmp gnuplot gnutls gopher gpgme
gphoto2 gpm graphviz gs gsl gsm gtk gtk2 gtkhtml guile hal hardened hash hbci
hddtemp hfs html i8x0 iconv icq icu id3 idea idn imagemagick imap imlib immqt
inkjar insecure-savers ipod ipv6 ipw3945 irda iso14755 ithreads jabber java jce
john jpeg jpeg2k json kerberos keyscrub kqemu ladspa lame lash lcms ldap
ldap-sasl libcaca libdsk libnotify libsamplerate libsexy libwww lights
linuxthreads-tls live lm_sensors logrotate lua lzo lzw m17n-lib math matroska
mbox mcal mccp md5sum meanwhile mhash midi mime mimencode ming mjpeg mmap mmx
mmxext mng mozbranding mozdevelop mozembed mozilla moznocompose moznoirc
moznomail mozsvg mp2 mp3 mp3rtp mp4 mp4live mpeg mpeg2 mplayer mpm-worker msn
musepack mysql ncurses net nethack network networking new-interface nfconntrack
nfs nis nls nntp normalizemime nptl nptlonly nsplugin ntlm offensive ofx ogg
on-the-fly-crypt openal openct openexr opengl openmp oscar overload pam pango
passwordsave pch pcmcia pcntl pcre pda perl php pic plotutils plugin png pnm
posix print python qt3support quicktime rar readline real realmedia reflection
regex resolvconf rle rtc ruby scanner sdl sensord session sharedext shorten
sift silc simplexml slang smartcard smime smp smtp sndfile sockets sound sox
speex spell spl sqlite sqlite3 sse sse2 ssl subtitles suhosin svg svgz syslog
sysvipc t1lib tcpd tetex tga theora threads threadsafe tidy tiff tokenizer
truetype type1 ucs2 ucs4 unicode urandom usb vcd vim vim-syntax vorbis
vorbis-psy wavpack wifi win32codecs wma wmf wmp x264 x86 xanim xcb
xchatdccserver xcomposite xface xforms xim xinetd xml xmlreader xmlrpc
xmlwriter xorg xosd xplanet xpm xprint xrandr xscreensaver xsl xslt xv xvid
xvmc yahoo yv12 zip zlib" ALSA_CARDS="hda-intel" ALSA_PCM_PLUGINS="adpcm alaw
asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa
lfloat linear meter mulaw multi null plug rate route share shm softvol"
CAMERAS="fuji" ELIBC="glibc" INPUT_DEVICES="evdev keyboard synaptics mouse
wacom" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216
lcdm001 mtxorb ncurses text" LINGUAS="en_GB en en_US de fr es ru"
USERLAND="GNU" VIDEO_CARDS="i810"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LDFLAGS,
PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

Created an attachment (id=133470) [details]
log of X crash

Created an attachment (id=133471) [details]
dont-segfault-if-dbus-isnt-running.patch

Here's a patch from upstream git to fix that. Can you test it?

The patch fixes the problem. Thanks for the quick reply. :)

Should be fixed in 1.4.0.90, please reopen if it's not.

*** Bug 192349 has been marked as a duplicate of this bug. ***