[Bug 370603] Re: Firefox crashes in Ubuntu 9.04, seemingly at random

Mariano Iglesias mariano at cricava.com
Tue May 26 19:29:52 UTC 2009


I also found a lot of random firefox crashes lately. First my
environment (Jaunty Jackalope, AMD64, Firefox 3.0.10):

$ uname -a
Linux seinfeld 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linu

So I decided to debug the issue. I used gdb to debug firefox by using
the following commands:

$ cd /usr/lib/firefox-3.0.10
$ /usr/lib/firefox-3.0.10/run-mozilla.sh -g firefox -d gdb

Once inside gdb, I entered the command run to start firefox, and then
using FF I accessed a website which I known to have crashed my FF
everytime. This is what GDB gave me after doing that:

/usr/bin/gdb firefox -x /tmp/mozargs.dyrlOe
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(no debugging symbols found)
(gdb) run
Starting program: /usr/lib/firefox-3.0.10/firefox '-d' 'gdb'
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[New Thread 0x7f43ca7b1700 (LWP 14094)]
(no debugging symbols found)
[New Thread 0x7f43ba11f950 (LWP 14097)]
[New Thread 0x7f43b9479950 (LWP 14098)]
[New Thread 0x7f43b8a12950 (LWP 14099)]
[Thread 0x7f43b8a12950 (LWP 14099) exited]
[New Thread 0x7f43b8a12950 (LWP 14100)]
[New Thread 0x7f43b1491950 (LWP 14101)]
[New Thread 0x7f43b0c90950 (LWP 14102)]
[New Thread 0x7f43af00c950 (LWP 14103)]
[New Thread 0x7f43ae7f7950 (LWP 14105)]
[New Thread 0x7f43a7f47950 (LWP 14114)]
[New Thread 0x7f43a7746950 (LWP 14115)]
[New Thread 0x7f43a50e1950 (LWP 14116)]
[New Thread 0x7f43a4888950 (LWP 14117)]
[Thread 0x7f43a50e1950 (LWP 14116) exited]
[Thread 0x7f43a4888950 (LWP 14117) exited]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f43ca7b1700 (LWP 14094)]
0x00007f43a9197702 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so

>From the above output, it was clear that the flash player was making
Firefox unstable. I then remembered I had installed the Flash plugin
from Adobe website directly. So I removed the plugin:

$ sudo rm /usr/lib/mozilla/plugins/libflashplayer.so

And then installed the plugin from the repositories:

$ sudo apt-get install flashplugin-installer

Since then I have had no crashes, yay!

If some of you still have crashes, I recommend you use GDB to get some
very valuable information.

Firefox crashes in Ubuntu 9.04, seemingly at random
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