pidgin crashed with SIGSEGV in dbus_g_proxy_call()

[Colan Schwartz]

Binary package hint: pidgin

I noticed that I wasn't getting bubble pop-ups so I went to Tools -> Plugins -> Libnotify Popups to uncheck and then recheck the checkbox to see if that would help. When doing so, Pidgin crashed.

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: pidgin 1:2.6.6-1ubuntu4
ProcVersionSignature: Ubuntu 2.6.32-24.41-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue Aug 24 15:10:31 2010
ExecutablePath: /usr/bin/pidgin
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
ProcCmdline: pidgin --session 1068d642fdb887b504128225911682747800000030260038 --display :0.0
ProcEnviron:
 LANG=en_CA.utf8
 SHELL=/bin/zsh
SegvAnalysis:
 Segfault happened at: 0x7fe3699e1d75 <dbus_g_proxy_call+133>: cmp %rbp,(%rax)
 PC (0x7fe3699e1d75) ok
 source "%rbp" ok
 destination "(%rax)" (0x00000004) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: pidgin
StacktraceTop:
 dbus_g_proxy_call ()
 notify_get_server_caps ()
 ?? () from /usr/lib/purple-2/pidgin-libnotify.so
 purple_plugin_load () from /usr/lib/libpurple.so.0
 ?? ()
Title: pidgin crashed with SIGSEGV in dbus_g_proxy_call()
UserGroups: adm admin cdrom dialout lp lpadmin plugdev sambashare

[Colan Schwartz (colan)]

Here's a core dump without my password in it. ;)

[Colan Schwartz (colan)]

After restarting, I found that unchecking & rechecking the checkbox worked. However, the next time I waited a few minutes before doing it, rather than trying it immediately, and I was able to reproduce it.

[Simon Déziel (sdeziel)]

I am able to reproduce this using the same pidgin version on amd64. In my case the crash only occurs after I unchecked/checked the checkbox and try to send the pidgin to the system tray.

$ dpkg -l| grep pidgin
ii pidgin 1:2.6.6-1ubuntu4 graphical multi-protocol instant messaging c
ii pidgin-data 1:2.6.6-1ubuntu4 multi-protocol instant messaging client - da
ii pidgin-libnotify 0.14-1ubuntu14 display notification bubbles in pidgin

Note: I am not running the default Lucid kernel but this one :
$ uname -a
Linux simon-laptop 2.6.35-17-generic #23~lucid1-Ubuntu SMP Fri Aug 20 02:07:55 UTC 2010 x86_64 GNU/Linux

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.04.1 LTS
Release: 10.04
Codename: lucid

[Simon Déziel (sdeziel)]

Here is the log extract corresponding to the 2 crashes I triggered :

$ grep pidgin /var/log/messages
Aug 24 16:01:27 simon-laptop kernel: [114264.935591] pidgin[2179]: segfault at 1d ip 00007fa209175448 sp 00007fff2bb1c810 error 4 in libgobject-2.0.so.0.2400.1[7fa209166000+45000]
Aug 24 16:32:40 simon-laptop kernel: [116138.656170] pidgin[15648]: segfault at 1d ip 00007f6c9e1bf448 sp 00007ffff2dcd3a0 error 4 in libgobject-2.0.so.0.2400.1[7f6c9e1b0000+45000]

[Dennis Sheil (dennis-sheil)]

I've reproduced the bug, using the debug symbol packages, for a more robust trace. Trace attached.

[Apport retracing service (apport)]

StacktraceTop:
 dbus_g_proxy_call (proxy=0x1f126b0,
 notify_get_server_caps () at notify.c:226
 plugin_load (plugin=0x1c413b0)
 purple_plugin_load (plugin=0x1c413b0)
 plugin_toggled (cell=<value optimized out>,

[dino99 (9d9)]

This version is outdated and no more supported