Bug 319930

Summary:	KDE Daemon Seg Faults when removing iwlwifi module (or when reinserting module?)
Product:	[Unmaintained] Network Management	Reporter:	peterbrowne
Component:	KDED Module	Assignee:	Lamarque V. Souza <lamarque>
Status:	RESOLVED INTENTIONAL
Severity:	crash
Priority:	NOR
Version First Reported In:	0.9
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description peterbrowne 2013-05-17 00:56:03 UTC

Application: kded4 ($Id$)
KDE Platform Version: 4.9.5
Qt Version: 4.8.3
Operating System: Linux 3.2.0-23-generic x86_64
Distribution: Linux Mint 14 Nadia

-- Information about the crash:
Wifi ceased to work properly (dropped connection to AP) and KDE was slow and sluggish - this occurs once every few days, maybe once or twice a week - so I switched to tty1 to modprobe -r iwlwifi and reinsert, upon Alt+F7, KDE Daemon returned a seg fault

Lenovo Y570(0862) Notebook Computer running Linux Mint 14 - current updates were downloading and installing in the background

-- Backtrace:
Application: KDE Dæmon (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb20f075780 (LWP 7957))]

Thread 4 (Thread 0x7fb1f1e60700 (LWP 7968)):
#0  0x00007fb20c9018cd in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fb20983e15f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb209801914 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb209801d22 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb209801ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb20dd2fc16 in QEventDispatcherGlib::processEvents (this=0x7fb1ec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fb20dd002bf in QEventLoop::processEvents (this=this@entry=0x7fb1f1e5fdd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fb20dd00548 in QEventLoop::exec (this=0x7fb1f1e5fdd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fb20dc01b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fb20dce09af in QInotifyFileSystemWatcherEngine::run (this=0x280b370) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fb20dc04aec in QThreadPrivate::start (arg=0x280b370) at thread/qthread_unix.cpp:338
#11 0x00007fb20a0dae9a in start_thread (arg=0x7fb1f1e60700) at pthread_create.c:308
#12 0x00007fb20c90eccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fb1eacdb700 (LWP 8028)):
#0  0x00007fb20983eba5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb20983ee49 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb209801672 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb209801cab in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb209801ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb20dd2fc16 in QEventDispatcherGlib::processEvents (this=0x7fb1e40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fb20dd002bf in QEventLoop::processEvents (this=this@entry=0x7fb1eacdadd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fb20dd00548 in QEventLoop::exec (this=0x7fb1eacdadd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fb20dc01b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fb20dce09af in QInotifyFileSystemWatcherEngine::run (this=0x2aedfd0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fb20dc04aec in QThreadPrivate::start (arg=0x2aedfd0) at thread/qthread_unix.cpp:338
#11 0x00007fb20a0dae9a in start_thread (arg=0x7fb1eacdb700) at pthread_create.c:308
#12 0x00007fb20c90eccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fb1e9dc7700 (LWP 8123)):
#0  0x00007fb20c9018cd in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fb20983e15f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb209801914 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb209801d22 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb209801ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb20dd2fc16 in QEventDispatcherGlib::processEvents (this=0x7fb1d40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fb20dd002bf in QEventLoop::processEvents (this=this@entry=0x7fb1e9dc6dd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fb20dd00548 in QEventLoop::exec (this=0x7fb1e9dc6dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fb20dc01b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fb20dce09af in QInotifyFileSystemWatcherEngine::run (this=0x2acad30) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fb20dc04aec in QThreadPrivate::start (arg=0x2acad30) at thread/qthread_unix.cpp:338
#11 0x00007fb20a0dae9a in start_thread (arg=0x7fb1e9dc7700) at pthread_create.c:308
#12 0x00007fb20c90eccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fb20f075780 (LWP 7957)):
[KCrash Handler]
#6  0x00007fb1f2a1841a in WirelessNetworkInterfaceActivatableProvider::handleAdd(Knm::Connection*) () from /usr/lib/libknmservice.so.4
#7  0x00007fb1f2a19d43 in WirelessNetworkInterfaceActivatableProvider::wirelessEnabledChanged(bool) () from /usr/lib/libknmservice.so.4
#8  0x00007fb1f2a06907 in WirelessNetworkInterfaceActivatableProvider::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/libknmservice.so.4
#9  0x00007fb20dd16f5f in QMetaObject::activate (sender=0x2911010, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff9b06b650) at kernel/qobject.cpp:3547
#10 0x00007fb1f257078e in Solid::Control::NetworkManagerNm09::Notifier::wirelessHardwareEnabledChanged(bool) () from /usr/lib/libsolidcontrolnm09.so.4
#11 0x00007fb1f25704b2 in Solid::Control::NetworkManagerNm09::Notifier::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/libsolidcontrolnm09.so.4
#12 0x00007fb20dd16f5f in QMetaObject::activate (sender=0x29473f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff9b06b7e0) at kernel/qobject.cpp:3547
#13 0x00007fb1f018a2c4 in Solid::Control::Ifaces::NetworkManagerNm09::wirelessHardwareEnabledChanged(bool) () from /usr/lib/libsolidcontrolnm09ifaces.so.4
#14 0x00007fb1f03a7010 in NMNetworkManagerNm09::propertiesChanged(QMap<QString, QVariant> const&) () from /usr/lib/kde4/solid_networkmanager09.so
#15 0x00007fb1f03a7ab2 in NMNetworkManagerNm09::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/kde4/solid_networkmanager09.so
#16 0x00007fb20dd16f5f in QMetaObject::activate (sender=0x2960730, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff9b06bac0) at kernel/qobject.cpp:3547
#17 0x00007fb1f03b62c1 in OrgFreedesktopNetworkManagerInterface::PropertiesChanged(QMap<QString, QVariant> const&) () from /usr/lib/kde4/solid_networkmanager09.so
#18 0x00007fb1f03b5af4 in OrgFreedesktopNetworkManagerInterface::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/kde4/solid_networkmanager09.so
#19 0x00007fb1f03b5f75 in OrgFreedesktopNetworkManagerInterface::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/solid_networkmanager09.so
#20 0x00007fb20b079ed3 in QDBusConnectionPrivate::deliverCall (this=0x27f2270, object=0x2960730, msg=..., metaTypes=..., slotIdx=8) at qdbusintegrator.cpp:947
#21 0x00007fb20dd1643e in QObject::event (this=0x2960730, e=<optimized out>) at kernel/qobject.cpp:1195
#22 0x00007fb20d0a8e9c in QApplicationPrivate::notify_helper (this=this@entry=0x267b010, receiver=receiver@entry=0x2960730, e=e@entry=0x293e300) at kernel/qapplication.cpp:4562
#23 0x00007fb20d0ad30a in QApplication::notify (this=0x7fff9b06c910, receiver=0x2960730, e=0x293e300) at kernel/qapplication.cpp:4423
#24 0x00007fb20ea791f6 in KApplication::notify (this=0x7fff9b06c910, receiver=0x2960730, event=0x293e300) at ../../kdeui/kernel/kapplication.cpp:311
#25 0x00007fb20dd0156e in QCoreApplication::notifyInternal (this=0x7fff9b06c910, receiver=receiver@entry=0x2960730, event=event@entry=0x293e300) at kernel/qcoreapplication.cpp:915
#26 0x00007fb20dd053f1 in sendEvent (event=0x293e300, receiver=0x2960730) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#27 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x25e42b0) at kernel/qcoreapplication.cpp:1539
#28 0x00007fb20dd2fa63 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#29 postEventSourceDispatch (s=0x267c180) at kernel/qeventdispatcher_glib.cpp:279
#30 0x00007fb209801ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fb209801de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fb209801ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007fb20dd2fbf6 in QEventDispatcherGlib::processEvents (this=0x25e67d0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#34 0x00007fb20d14dc1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#35 0x00007fb20dd002bf in QEventLoop::processEvents (this=this@entry=0x7fff9b06c690, flags=...) at kernel/qeventloop.cpp:149
#36 0x00007fb20dd00548 in QEventLoop::exec (this=0x7fff9b06c690, flags=...) at kernel/qeventloop.cpp:204
#37 0x00007fb20dd05708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#38 0x00007fb1fa87b3f0 in kdemain (argc=1, argv=0x265c2c0) at ../../kded/kded.cpp:924
#39 0x00000000004084c6 in launch (argc=argc@entry=1, _name=_name@entry=0x40b126 "kded4", args=args@entry=0x0, cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x0, reset_env=reset_env@entry=false, tty=tty@entry=0x0, avoid_loops=avoid_loops@entry=false, startup_id_str=startup_id_str@entry=0x40afb6 "0") at ../../kinit/kinit.cpp:738
#40 0x0000000000405a29 in main (argc=4, argv=<optimized out>, envp=0x7fff9b06d310) at ../../kinit/kinit.cpp:1853

Reported using DrKonqi

Comment 1 Lamarque V. Souza 2013-06-10 14:17:20 UTC

Which Plasma NM version do you use? You can see the version string in "Manage Connections" -> "Other".

Comment 2 Lamarque V. Souza 2013-07-05 16:03:01 UTC

Anyway, even kernel developers acknowledge that removing kernel modules is race condition prone, in other words: it should not be done, if you do it then you are assuming the risks.