Crash when inserting/switching modem: "code should not be reached"

[Marius B. Kotsbak]

I sometimes when inserting/removing/switching modem get this crash. Apport failed to report it, but using its local inventigation feature, I got this backtrace:

#0 0xb779b424 in __kernel_vsyscall ()
#1 0xb74581df in __GI_raise (sig=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2 0xb745b825 in __GI_abort () at abort.c:91
#3 0xb76597e8 in g_assertion_message (domain=domain@entry=0x0,
    file=file@entry=0x809401d "mm-manager.c", line=line@entry=715,
    func=func@entry=0x8094be1 <__PRETTY_FUNCTION__.14141> "supports_callback",
    message=0xb76832b4 "code should not be reached", message@entry=0x0)
    at /build/buildd/glib2.0-2.34.0/./glib/gtestutils.c:1877
#4 0x08056613 in supports_callback (plugin=0x8c8eae0,
    subsys=subsys@entry=0x8c8dae8 "tty", name=name@entry=0x8cb0848 "ttyUSB4",
    level=level@entry=0, user_data=0x8cb20c0) at mm-manager.c:715
#5 0x0807d6c9 in mm_plugin_base_supports_task_complete (
    task=task@entry=0x8ca6468, level=0) at mm-plugin-base.c:335
#6 0xb7783c7f in probe_result (base=base@entry=0x8c8eae0, task=0x8ca6468,
    capabilities=0, user_data=0x0) at mm-plugin-cinterion.c:114
#7 0x080801a1 in mm_marshal_VOID__OBJECT_UINT (
    closure=closure@entry=0x8c9a4f0, return_value=return_value@entry=0x0,
    n_param_values=n_param_values@entry=3,
    param_values=param_values@entry=0xbf819340,
    invocation_hint=invocation_hint@entry=0xbf8192ec,
    marshal_data=marshal_data@entry=0x0) at mm-marshal.c:161
#8 0xb76f7826 in g_closure_invoke (closure=0x8c9a4f0,

    return_value=return_value@entry=0x0, n_param_values=3,
    param_values=param_values@entry=0xbf819340,
    invocation_hint=invocation_hint@entry=0xbf8192ec)
    at /build/buildd/glib2.0-2.34.0/./gobject/gclosure.c:777
#9 0xb770961f in signal_emit_unlocked_R (node=node@entry=0x8c98a60,
    detail=detail@entry=0, instance=instance@entry=0x8c8eae0,
    emission_return=emission_return@entry=0x0,
    instance_and_params=instance_and_params@entry=0xbf819340)
    at /build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3551
#10 0xb7711732 in g_signal_emit_valist (instance=instance@entry=0x8c8eae0,
    signal_id=signal_id@entry=6, detail=detail@entry=0,
    var_args=0xbf819554 "\346qg\267", var_args@entry=0xbf81954c "hd\312\b")
    at /build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3300
#11 0xb77118b3 in g_signal_emit (instance=instance@entry=0x8c8eae0,
    signal_id=6, detail=detail@entry=0)
    at /build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3356
#12 0x0807ccda in emit_probe_result (user_data=user_data@entry=0x8ca6468)
    at mm-plugin-base.c:610
#13 0xb7632c30 in g_idle_dispatch (source=source@entry=0x8c95968,
    callback=0x807cc40 <emit_probe_result>, user_data=0x8ca6468)
    at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:4806
#14 0xb76359e3 in g_main_dispatch (context=0x8c89960)
    at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:2715

#15 g_main_context_dispatch (context=context@entry=0x8c89960)
    at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3219
#16 0xb7635d80 in g_main_context_iterate (context=0x8c89960,
    block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3290
#17 0xb76361db in g_main_loop_run (loop=0x8ca4978)
    at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3484
#18 0x08052e8e in main (argc=1, argv=0xbf819964) at main.c:199

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: modemmanager 0.6.0.0.really-0ubuntu1 [modified: lib/udev/rules.d/77-mm-ericsson-mbm.rules lib/udev/rules.d/77-mm-usb-device-blacklist.rules lib/udev/rules.d/80-mm-candidate.rules]
Uname: Linux 3.6.0-030600-generic i686
ApportVersion: 2.6.1-0ubuntu3
Architecture: i386
Date: Tue Oct 16 14:25:03 2012
EcryptfsInUse: Yes
SourcePackage: modemmanager
UpgradeStatus: Upgraded to quantal on 2012-08-31 (45 days ago)

[Marius B. Kotsbak (mariusko)]

I am unsure if this is a duplicate or related to bug #970607.

[Marius B. Kotsbak (mariusko)]

I think this is the output when it happens:

modem-manager[7169]: <debug> [1350412098.663568] [mm-manager.c:690] supports_callback(): (tty/ttyUSB6): ignoring port unsupported by physical modem's plugin
modem-manager[7169]: <debug> [1350412098.663733] [mm-manager.c:298] check_export_modem(): (tty/ttyUSB8): outstanding support task prevents export of /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-8
modem-manager[7169]: <debug> [1350412099.661949] [mm-qcdm-serial-port.c:196] debug_log(): (ttyUSB8): --> 7e 00 78 f0 7e
modem-manager[7169]: <debug> [1350412102.664499] [mm-serial-port.c:908] mm_serial_port_close(): (ttyUSB8) device open count is 0 (close)
modem-manager[7169]: <info> [1350412102.664663] [mm-serial-port.c:923] mm_serial_port_close(): (ttyUSB8) closing serial port...
modem-manager[7169]: <info> [1350412102.664828] [mm-serial-port.c:944] mm_serial_port_close(): (ttyUSB8) serial port closed
modem-manager[7169]: <debug> [1350412102.666134] [mm-manager.c:714] supports_callback(): (tty/ttyUSB8): plugin 0x8b4bae0 (Cinterion) existing 0x8b4bda0 (Sierra) info->best 0x8b4bda0 (Sierra)
**
ERROR:mm-manager.c:715:supports_callback: code should not be reached

[Mathieu Trudel-Lapierre (cyphermox)]

Would be http://cgit.freedesktop.org/ModemManager/ModemManager/commit/?h=MM_06&id=f6d9f53369200ba277a48de3a24c377799765559

Definitely a candidate for SRU.

[jevgtv (tugevus)]

I have overcome the problem by installing package "wader-core" instead of "ModemManager"

[Rolf Leggewie (r0lf)]

quantal has seen the end of its life and is no longer receiving any updates. Marking the quantal task for this ticket as "Won't Fix".

[Steve Langasek (vorlon)]

The Precise Pangolin has reached end of life, so this bug will not be fixed for that release