Bug#663899: resolver blocks, unable to open some websites or, sometimes, anything at all; high CPU load

[Andrew Shadura]

Package: iceweasel

Version: 11.0~a2+20120127042007-1
Severity: normal

First of all, I must note that I use dual-stack system. Mostly, when
I have IPv4-only connectivity, the bug doesn't show up that frequently.

The problem arises when for some reason (weak wireless signal, for
example), the resolver fails. After that, it seems like it blocks
somewhere and is unable to resolve any address at all. Every other
program works perfectly here.

Also, quite often this is accompanied by extremely high CPU load:

10289 andrew     20   0  789M  422M 35664 S 107% 13.9 36:31.78 /usr/lib/iceweasel/firefox-bin

Restarting Iceweasel usually helps.

-- Package-specific info:

-- Extensions information
Name: Adblock Plus extensionfalse
Location: ${PROFILE_EXTENSIONS}/{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}.xpi
Status: enabled

Name: Add-on Compatibility Reporter extensionfalse
Location: ${PROFILE_EXTENSIONS}/compatibility at addons.mozilla.org.xpi
Status: enabled

Name: British English Dictionary extensionfalse
Location: ${PROFILE_EXTENSIONS}/en-GB at dictionaries.addons.mozilla.org
Status: enabled

Name: Default themefalse
Location: /usr/lib/iceweasel/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
Status: enabled

Name: DOM Inspector extensionfalse
Location: ${PROFILE_EXTENSIONS}/inspector at mozilla.org.xpi
Status: enabled

Name: DownThemAll! extensionfalse
Location: ${PROFILE_EXTENSIONS}/{DDC359D1-844A-42a7-9AA1-88A850A938A8}.xpi
Status: enabled

Name: Element Hiding Helper for Adblock Plus extensionfalse
Location: ${PROFILE_EXTENSIONS}/elemhidehelper at adblockplus.org.xpi
Status: enabled

Name: Forecastfox extensionfalse
Location: ${PROFILE_EXTENSIONS}/{0538E3E3-7E9B-4d49-8831-A227C80A7AD3}
Status: enabled

Name: Vimperator extensionfalse
Location: ${PROFILE_EXTENSIONS}/vimperator at mozdev.org.xpi
Status: enabled

-- Plugins information
Name: MozPlugger 1.12.1 handles QuickTime and Windows Media Player Plugin
Location: /usr/lib/mozilla/plugins/mozplugger.so
Status: enabled

Name: MozPlugger 1.12.1 handles QuickTime and Windows Media Player Plugin
Location: /usr/lib/mozilla/plugins/mozplugger.so
Status: enabled

Name: Picasa
Location: /opt/google/picasa/3.0/lib/npPicasa3.so
Status: enabled

Name: Shockwave Flash
Location: /usr/lib/flashplugin-nonfree/libflashplayer.so
Status: enabled


-- Addons package information

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-rc7-686-pae (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_GB.UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages iceweasel depends on:
ii  debianutils         4.0.2                   
ii  fontconfig          2.8.0-3                 
ii  libc6               2.13-26                 
ii  libgdk-pixbuf2.0-0  2.24.0-1                
ii  libglib2.0-0        2.30.2-6                
ii  libgtk2.0-0         2.24.8-3                
ii  libnspr4-0d         4.8.7-1                 
ii  libstdc++6          4.6.2-12                
ii  procps              1:3.2.8-9               
ii  xulrunner-11.0      11.0~a2+20120127042007-1

iceweasel recommends no packages.

Versions of packages iceweasel suggests:
ii  latex-xft-fonts     1.6.4-1          
ii  libgssapi-krb5-2    1.10+dfsg~beta1-2
ii  mozplugger          1.12.1-2         
ii  ttf-lyx             2.0.0~beta4-1    
ii  ttf-mathematica4.1  <none>           
ii  xfonts-mathml       4                

Versions of packages xulrunner-11.0 depends on:
ii  libasound2                1.0.24.1-3              
ii  libatk1.0-0               2.2.0-2                 
ii  libbz2-1.0                1.0.5-3                 
ii  libc6                     2.13-26                 
ii  libcairo2                 1.10.2-2                
ii  libdbus-1-3               1.4.16-1                
ii  libdbus-glib-1-2          0.98-1                  
ii  libevent-2.0-5            2.0.16-stable-1         
ii  libfontconfig1            2.8.0-2.1               
ii  libfreetype6              2.4.2-2.1               
ii  libgcc1                   1:4.6.2-12              
ii  libgdk-pixbuf2.0-0        2.24.0-1                
ii  libglib2.0-0              2.30.2-6                
ii  libgtk2.0-0               2.24.8-3                
ii  libhunspell-1.3-0         1.3.2-4                 
ii  libjpeg8                  8c-2                    
ii  libmozjs11d               11.0~a2+20120127042007-1
ii  libnotify4                0.7.3-2                 
ii  libnspr4-0d               4.8.7-1                 
ii  libnss3-1d                3.13.2~beta1-3          
ii  libpango1.0-0             1.29.4-2                
ii  libpixman-1-0             0.22.2-1                
ii  libreadline6              6.2-8                   
ii  libsqlite3-0              3.7.4-2                 
ii  libstartup-notification0  0.10-1                  
ii  libstdc++6                4.6.2-12                
ii  libvpx0                   0.9.7.p1-2              
ii  libx11-6                  2:1.3.3-3               
ii  libxext6                  2:1.2.0-2               
ii  libxrender1               1:0.9.4-2               
ii  libxt6                    1:1.0.6-1               
ii  zlib1g                    1:1.2.3.4.dfsg-3        

Versions of packages xulrunner-11.0 suggests:
ii  libcanberra0  0.24-1  
ii  libgnomeui-0  2.24.1-1

-- no debconf information