Bug#834995: firefox: Crashes at startup on non-local display

[Andreas Metzler]

Package: firefox
Version: 49.0~b1-1
Severity: important

Hello,

After upgrading firefox from 48.0-1 to 49.0~b1-1  it segfaults at startup
when $DISPLAY is not "owned" by the user running firefox. This shows up
e.g. when running through ssh adifferentuser at localhost or with su - and
manual setting of DISPLAY and XAUTHORITY.

At the time of crash a "Firefox Update" window is open. (See attached
screenshot).

gdb backtrace (with MOZILLA_DISABLE_PLUGINS=1) attached.

cu Andreas

-- Package-specific info:

-- Extensions information
Name: Clear Search 2
Location: ${PROFILE_EXTENSIONS}/ClearSearch2 at extension-id.invalid.xpi
Status: enabled

Name: Default theme
Location: /usr/lib/firefox/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi
Package: firefox
Status: enabled

Name: Download YouTube Videos as MP4
Location: ${PROFILE_EXTENSIONS}/{b9bfaf1c-a63f-47cd-8b9a-29526ced9060}.xpi
Status: enabled

Name: Multi-process staged rollout
Location: ${PROFILE_EXTENSIONS}/e10srollout at mozilla.org.xpi
Status: enabled

Name: Pocket
Location: ${PROFILE_EXTENSIONS}/firefox at getpocket.com.xpi
Status: enabled

Name: Web Compat
Location: ${PROFILE_EXTENSIONS}/webcompat at mozilla.org.xpi
Status: enabled

-- Plugins information
Name: Shockwave Flash (11.2.202.632)
Location: /usr/lib/flashplugin-nonfree/libflashplayer.so
Status: enabled


-- Addons package information
ii  firefox        49.0~b1-1    amd64        Mozilla Firefox web browser

-- System Information:
Debian Release: stretch/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.6.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages firefox depends on:
ii  debianutils               4.8
ii  fontconfig                2.11.0-6.5
ii  libasound2                1.1.2-1
ii  libatk1.0-0               2.20.0-1
ii  libc6                     2.23-4
ii  libcairo2                 1.14.6-1+b1
ii  libdbus-1-3               1.10.10-1
ii  libdbus-glib-1-2          0.106-1
ii  libevent-2.0-5            2.0.21-stable-2+b1
ii  libffi6                   3.2.1-4
ii  libfontconfig1            2.11.0-6.5
ii  libfreetype6              2.6.3-3+b1
ii  libgcc1                   1:6.1.1-11
ii  libgdk-pixbuf2.0-0        2.34.0-1
ii  libglib2.0-0              2.48.1-2
ii  libgtk2.0-0               2.24.30-4
ii  libhunspell-1.4-0         1.4.1-2
ii  libnspr4                  2:4.12-2
ii  libnss3                   2:3.25-1
ii  libpango-1.0-0            1.40.1-1
ii  libsqlite3-0              3.13.0-1
ii  libstartup-notification0  0.12-4
ii  libstdc++6                6.1.1-11
ii  libvpx3                   1.5.0-4
ii  libx11-6                  2:1.6.3-1
ii  libxcomposite1            1:0.4.4-1
ii  libxdamage1               1:1.1.4-2+b1
ii  libxext6                  2:1.3.3-1
ii  libxfixes3                1:5.0.2-1
ii  libxrender1               1:0.9.9-2
ii  libxt6                    1:1.1.5-1
ii  procps                    2:3.3.12-2
ii  zlib1g                    1:1.2.8.dfsg-2+b1

firefox recommends no packages.

Versions of packages firefox suggests:
pn  fonts-lmodern          <none>
pn  fonts-stix | otf-stix  <none>
ii  libcanberra0           0.30-3
pn  libgnomeui-0           <none>
ii  libgssapi-krb5-2       1.14.3+dfsg-1
pn  mozplugger             <none>

-- no debconf information
-- 
`What a good friend you are to him, Dr. Maturin. His other friends are
so grateful to you.'
`I sew his ears on from time to time, sure'
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