[Bug 20992] New: Dispatcher: null pointer dereference if ObserveChannels times out

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=20992

           Summary: Dispatcher: null pointer dereference if ObserveChannels
                    times out
           Product: Telepathy
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: telepathy-mission-control
        AssignedTo: telepathy-bugs at lists.freedesktop.org
        ReportedBy: simon.mcvittie at collabora.co.uk


Created an attachment (id=24429)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=24429)
Unfinished regression test which demonstrates the bug

An unfinished test that does not yet return from ObserveChannels (attached)
causes Mission Control to segfault.

#0  0x4005a970 in mcd_connection_get_account (id=0x0) at mcd-connection.c:1982
No locals.
#1  0x40064afc in mcd_dispatcher_context_get_protocol_name (context=0x8b92740)
    at mcd-dispatcher.c:2911
        conn = (McdConnection *) 0x0
        account = <value optimized out>
#2  0x4006d6d0 in mcd_dispatcher_run_handlers (context=0x8b92740)
    at mcd-dispatcher.c:815
        channels = (GList *) 0x8b93d90
        unhandled = (GList *) 0x8b88830
#3  0x4006e0bd in mcd_dispatcher_context_release_client_lock (
    context=0x8b92740) at mcd-dispatcher.c:1346
        __PRETTY_FUNCTION__ = "mcd_dispatcher_context_release_client_lock"
#4  0x4006e304 in observe_channels_cb (proxy=0x8b72f50, error=0x8b93da0, 
    user_data=0x8b92740, weak_object=0x8b82828) at mcd-dispatcher.c:1360
        __PRETTY_FUNCTION__ = "observe_channels_cb"
#5  0x4006c0d7 in _mc_cli_client_observer_invoke_callback_observe_channels (
    self=0x8b72f50, error=0x8b93da0, args=0x0, 
    generic_callback=0x4006e270 <observe_channels_cb>, user_data=0x8b92740, 
    weak_object=0x8b82828) at _gen/cli-client-body.h:626
No locals.
#6  0x402afdf7 in tp_proxy_pending_call_idle_invoke (p=0x8b8f6b0)
    at proxy-methods.c:153
        invoke = (TpProxyInvokeFunc) 0x8b73bd8
        __PRETTY_FUNCTION__ = "tp_proxy_pending_call_idle_invoke"
#7  0x403a5811 in g_idle_dispatch (source=0x8b93af0, callback=0, 
    user_data=0x8b8f6b0)
    at
/build/buildd-glib2.0_2.20.0-2-i386-rcJiVy/glib2.0-2.20.0/glib/gmain.c:3922
No locals.
#8  0x403a7718 in IA__g_main_context_dispatch (context=0x8b77da8)
    at
/build/buildd-glib2.0_2.20.0-2-i386-rcJiVy/glib2.0-2.20.0/glib/gmain.c:1814
No locals.
#9  0x403aac7b in g_main_context_iterate (context=0x8b77da8, block=1, 
    dispatch=1, self=0x8b7b9d0)
    at
/build/buildd-glib2.0_2.20.0-2-i386-rcJiVy/glib2.0-2.20.0/glib/gmain.c:2448
        max_priority = -100
        timeout = 0
        some_ready = 1
        nfds = 0
        allocated_nfds = <value optimized out>
        fds = (GPollFD *) 0x8b7c260
        __PRETTY_FUNCTION__ = "g_main_context_iterate"
#10 0x403ab14a in IA__g_main_loop_run (loop=0x8b78bc0)
    at
/build/buildd-glib2.0_2.20.0-2-i386-rcJiVy/glib2.0-2.20.0/glib/gmain.c:2656
        self = (GThread *) 0x8b7b9d0
        __PRETTY_FUNCTION__ = "IA__g_main_loop_run"
#11 0x4007690e in mcd_service_run (self=0x8b7f810) at mcd-service.c:987
No locals.
#12 0x080492c0 in main () at mc-debug-server.c:109
        bus_daemon = <value optimized out>
        mcd = <value optimized out>
        error = (GError *) 0x0
        connection = (DBusConnection *) 0x8b76438
        ret = <value optimized out>


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