mission-control-5 crashed with SIGSEGV in g_str_hash()

[Alberto Mardegan]

I was testing shotwell with UOA; I killed the signon-ui process (which is the one providing the com.canonical.indicators.webcredentials service) and a couple of seconds later apport notified me that MC5 had crashed (I wasn't actively using empathy).

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: telepathy-mission-control-5 1:5.13.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-14.16-generic 3.5.3
Uname: Linux 3.5.0-14-generic x86_64
ApportVersion: 2.5.1-0ubuntu7
Architecture: amd64
Date: Wed Sep 12 10:19:39 2012
ExecutablePath: /usr/lib/telepathy/mission-control-5
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-3.5.0-14-generic root=UUID=e6a73b41-3db6-4165-ab61-812600c6adda ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f1168f16360 <g_str_hash>: movsbl (%rdi),%edx
 PC (0x7f1168f16360) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: telepathy-mission-control-5
StacktraceTop:
 g_str_hash (v=0x0) at /build/buildd/glib2.0-2.33.12/./glib/ghash.c:1730
 g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x0, hash_table=0x1e000c0) at /build/buildd/glib2.0-2.33.12/./glib/ghash.c:401
 g_hash_table_lookup (hash_table=0x1e000c0, key=key@entry=0x0) at /build/buildd/glib2.0-2.33.12/./glib/ghash.c:1074
 mcd_account_manager_lookup_account (account_manager=<optimized out>, name=name@entry=0x0) at mcd-account-manager.c:1772
 reconnect_cb (plugin=<optimized out>, name=0x0, data=0x1dcfa30) at mcd-account-manager.c:420
Title: mission-control-5 crashed with SIGSEGV in g_str_hash()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin nopasswdlogin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 g_str_hash (v=0x0) at /build/buildd/glib2.0-2.33.12/./glib/ghash.c:1730
 g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x0, hash_table=0x1e000c0) at /build/buildd/glib2.0-2.33.12/./glib/ghash.c:401
 g_hash_table_lookup (hash_table=0x1e000c0, key=key@entry=0x0) at /build/buildd/glib2.0-2.33.12/./glib/ghash.c:1074
 mcd_account_manager_lookup_account (account_manager=<optimized out>, name=name@entry=0x0) at mcd-account-manager.c:1772
 reconnect_cb (plugin=<optimized out>, name=0x0, data=0x1dcfa30) at mcd-account-manager.c:420

[Guillaume Desmottes (cassidy)]

Fixed with http://git.gnome.org/browse/empathy/commit/?id=5676e2a343460465e4439449e4d6d834f21ccdbd

[Alberto Mardegan (mardy)]

For the record: this crash is unlikely to happen out there: it happened on my machine because I had an additional service file for the google account, which I've been using for development/testing purposes.

But indeed the fix is very welcome, and contributes to the robustness.

Thanks Guillaume!