Bug 355235

Summary:	kdeinit5 crash upon undocking
Product:	[Frameworks and Libraries] frameworks-kinit	Reporter:	Martin Kyral <sine.nomine>
Component:	general	Assignee:	David Faure <faure>
Status:	RESOLVED WORKSFORME
Severity:	crash	CC:	kdelibs-bugs-null
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Martin Kyral 2015-11-12 11:13:58 UTC

Very often (not all the time, though), kdeinit5 crashes when I'm undocking my laptop (Lenovo T450s).

Stacktrace:
Application: kdeinit5 (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
40	  int result = INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL);
[KCrash Handler]
#5  0x00007f2cac357628 in QXcbConnection::updateScreens(xcb_randr_notify_event_t const*) () from /lib64/libQt5XcbQpa.so.5
#6  0x00007f2cac358e93 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /lib64/libQt5XcbQpa.so.5
#7  0x00007f2cac359433 in QXcbConnection::processXcbEvents() () from /lib64/libQt5XcbQpa.so.5
#8  0x00007f2cc6b7c1b1 in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5
#9  0x00007f2cc6b4c649 in QCoreApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#10 0x00007f2cc6b4c77b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#11 0x00007f2cc6b4eb76 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib64/libQt5Core.so.5
#12 0x00007f2cc6ba0472 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#13 0x00007f2cac3bd95d in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5XcbQpa.so.5
#14 0x00007f2cc6b49f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#15 0x00007f2cc6b51fec in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#16 0x00007f2cac81ce52 in kdemain () from /lib64/libkdeinit5_klauncher.so
#17 0x00000000004085e0 in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) ()
#18 0x0000000000405843 in main ()




Reproducible: Sometimes

Comment 1 Christoph Feck 2015-11-13 11:13:38 UTC

Crash is in the Qt libraries. These bugs are reported upstream, and are still being investigated.
See e.g. https://bugreports.qt.io/browse/QTBUG-42985

Comment 2 Martin Kyral 2016-02-25 08:13:39 UTC

Unfortunatelly even after the 'fix' of the bug in QT, kdeinit5 + bunch of other KDE processes crashes almost every time when I suspend the laptop, undock it and resume after a while. Yesterday something went so wrong that I am now unable to even start plasmashell - it hangs waiting on some futex. I am disappointed by that to the point that I am considering switch to another desktop - KDE is unusable for me now anyways. It is another bug in QT it seems. Please file them an issue for me.

Application: kdeinit5 (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa03260e8c0 (LWP 15813))]

Thread 2 (Thread 0x7fa00fad1700 (LWP 15815)):
#0  0x00007fa02fcc8fdd in poll () at /lib64/libc.so.6
#1  0x00007fa02e33f16c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fa02e33f27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fa030b00acb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fa030aa950a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fa0308d5744 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fa0326cd225 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007fa0308da6b8 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007fa02f51160a in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa02fcd4a4d in clone () at /lib64/libc.so.6

    Thread 1 (Thread 0x7fa03260e8c0 (LWP 15813)):
        [KCrash Handler]
#4  0x00007fa016873081 in QXcbConnection::updateScreens(xcb_randr_notify_event_t const*) () at /lib64/libQt5XcbQpa.so.5
#5  0x00007fa016874732 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /lib64/libQt5XcbQpa.so.5
#6  0x00007fa016874bf6 in QXcbConnection::processXcbEvents() () at /lib64/libQt5XcbQpa.so.5
#7  0x00007fa030ad8e59 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#8  0x00007fa030aab7ea in QCoreApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#9  0x00007fa030aab948 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5                         
#10 0x00007fa030aad80a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5       
#11 0x00007fa030afe152 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5   
#12 0x00007fa0168e19fd in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5                                                                                                                                  
#13 0x00007fa030aa950a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5                      
#14 0x00007fa030ab1d4c in QCoreApplication::exec() () at /lib64/libQt5Core.so.5                                                     
#15 0x00007fa01726bc7a in kdemain () at /lib64/libkdeinit5_klauncher.so                                                             
#16 0x000055da5c633776 in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) ()                                                                                                                                 
#17 0x000055da5c630a17 in main ()                                                                                                   
                                                                                                                                    
                                                                                                                                    
Application: KDE Global Shortcuts Service (kglobalaccel5), signal: Segmentation fault                                               
Using host libthread_db library "/lib64/libthread_db.so.1".                                                                         
[Current thread is 1 (Thread 0x7fa16902b8c0 (LWP 15851))]                                                                           
                                                                                                                                    
Thread 2 (Thread 0x7fa147436700 (LWP 15867)):                                                                                       
#0  0x00007fa166386bcd in read () at /lib64/libc.so.6                                                                               
#1  0x00007fa164df1390 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0                                                        
#2  0x00007fa164dadc64 in g_main_context_check () at /lib64/libglib-2.0.so.0                                                        
#3  0x00007fa164dae110 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0                                                 
#4  0x00007fa164dae27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0                                                    
#5  0x00007fa1671c2acb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5   
#6  0x00007fa16716b50a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5                      
#7  0x00007fa166f97744 in QThread::exec() () at /lib64/libQt5Core.so.5                                                              
#8  0x00007fa1690ea225 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#9  0x00007fa166f9c6b8 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007fa1652f660a in start_thread () at /lib64/libpthread.so.0
#11 0x00007fa166396a4d in clone () at /lib64/libc.so.6

    Thread 1 (Thread 0x7fa16902b8c0 (LWP 15851)):
        [KCrash Handler]
#4  0x00007fa156289081 in QXcbConnection::updateScreens(xcb_randr_notify_event_t const*) () at /lib64/libQt5XcbQpa.so.5
#5  0x00007fa15628a732 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /lib64/libQt5XcbQpa.so.5
#6  0x00007fa15628abf6 in QXcbConnection::processXcbEvents() () at /lib64/libQt5XcbQpa.so.5
#7  0x00007fa16719ae59 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#8  0x00007fa167d365ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#9  0x00007fa167d3b836 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#10 0x00007fa16716d948 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#11 0x00007fa16716f80a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#12 0x00007fa1671c26a3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#13 0x00007fa164dade3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#14 0x00007fa164dae1d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#15 0x00007fa164dae27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#16 0x00007fa1671c2aaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#17 0x00007fa16716b50a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#18 0x00007fa167173d4c in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#19 0x0000560ee1f73b11 in main ()


Application: kdeinit5 (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faaa28b58c0 (LWP 28902))]

Thread 7 (Thread 0x7faa76785700 (LWP 28912)):
#0  0x00007faa9e62a734 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007faa9e5e6161 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007faa9e5e627c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007faa9e5e62b9 in glib_worker_main () at /lib64/libglib-2.0.so.0
#4  0x00007faa9e60c835 in g_thread_proxy () at /lib64/libglib-2.0.so.0
#5  0x00007faa9f7b860a in start_thread () at /lib64/libpthread.so.0
#6  0x00007faa9ff7ba4d in clone () at /lib64/libc.so.6

    Thread 6 (Thread 0x7faa75f84700 (LWP 28913)):
#0  0x00007faa9ff6ffdd in poll () at /lib64/libc.so.6
#1  0x00007faa9e5e616c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007faa9e5e64f2 in g_main_loop_run () at /lib64/libglib-2.0.so.0
#3  0x00007faa770a5336 in gdbus_shared_thread_func () at /lib64/libgio-2.0.so.0
#4  0x00007faa9e60c835 in g_thread_proxy () at /lib64/libglib-2.0.so.0
#5  0x00007faa9f7b860a in start_thread () at /lib64/libpthread.so.0
#6  0x00007faa9ff7ba4d in clone () at /lib64/libc.so.6

        Thread 5 (Thread 0x7faa6f303700 (LWP 28916)):
#0  0x00007faa9ff6ffdd in poll () at /lib64/libc.so.6
#1  0x00007faa9e5e616c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007faa9e5e627c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007faaa0da7acb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007faaa0d5050a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007faaa0b7c744 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007faaa0b816b8 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007faa9f7b860a in start_thread () at /lib64/libpthread.so.0
#8  0x00007faa9ff7ba4d in clone () at /lib64/libc.so.6

            Thread 4 (Thread 0x7faa6376c700 (LWP 28969)):
#0  0x00007faa9ff6ffdd in poll () at /lib64/libc.so.6
#1  0x00007faa9e5e616c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007faa9e5e627c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007faaa0da7acb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007faaa0d5050a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007faaa0b7c744 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007faa6e6b3547 in KCupsConnection::run() () at /lib64/libkcupslib.so
#7  0x00007faaa0b816b8 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007faa9f7b860a in start_thread () at /lib64/libpthread.so.0
#9  0x00007faa9ff7ba4d in clone () at /lib64/libc.so.6

                Thread 3 (Thread 0x7faa62f6b700 (LWP 28970)):
#0  0x00007faa9ff6ffdd in poll () at /lib64/libc.so.6
#1  0x00007faa9e5e616c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007faa9e5e627c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007faaa0da7acb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007faaa0d5050a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007faaa0b7c744 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007faaa0b816b8 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007faa9f7b860a in start_thread () at /lib64/libpthread.so.0
#8  0x00007faa9ff7ba4d in clone () at /lib64/libc.so.6

                    Thread 2 (Thread 0x7faa5a348700 (LWP 29138)):
                        [KCrash Handler]
#5  0x00007faa901a98db in QNetworkConfigurationManagerPrivate::pollEngines() () at /lib64/libQt5Network.so.5
#6  0x00007faa902264ed in QNetworkConfigurationManagerPrivate::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libQt5Network.so.5
#7  0x00007faaa0d7f020 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#8  0x00007faaa0d8b858 in QTimer::timerEvent(QTimerEvent*) () at /lib64/libQt5Core.so.5
#9  0x00007faaa0d7fe13 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#10 0x00007faaa0d5293b in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#11 0x00007faaa0da699e in QTimerInfoList::activateTimers() () at /lib64/libQt5Core.so.5
#12 0x00007faaa0da6ed1 in timerSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#13 0x00007faa9e5e5e3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#14 0x00007faa9e5e61d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#15 0x00007faa9e5e627c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#16 0x00007faaa0da7aaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#17 0x00007faaa0d5050a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#18 0x00007faaa0b7c744 in QThread::exec() () at /lib64/libQt5Core.so.5
#19 0x00007faaa0b816b8 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#20 0x00007faa9f7b860a in start_thread () at /lib64/libpthread.so.0
#21 0x00007faa9ff7ba4d in clone () at /lib64/libc.so.6

                         Thread 1 (Thread 0x7faaa28b58c0 (LWP 28902)):
#0  0x00007faa9f7bdb10 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007faaa0b8256b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib64/libQt5Core.so.5
#2  0x00007faaa0b7b39b in QSemaphore::acquire(int) () at /lib64/libQt5Core.so.5
#3  0x00007faaa0d7f26f in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#4  0x00007faaa0d7f99f in QObject::destroyed(QObject*) () at /lib64/libQt5Core.so.5
#5  0x00007faaa0d86465 in QObject::~QObject() () at /lib64/libQt5Core.so.5
#6  0x00007faa7f88f159 in Breeze::Style::~Style() () at /usr/lib64/qt5/plugins/styles/breeze.so
#7  0x00007faaa0d7f35e in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#8  0x00007faaa0d7f99f in QObject::destroyed(QObject*) () at /lib64/libQt5Core.so.5
#9  0x00007faaa0d86465 in QObject::~QObject() () at /lib64/libQt5Core.so.5
#10 0x00007faa7f8a6c07 in Breeze::StylePlugin::~StylePlugin() () at /usr/lib64/qt5/plugins/styles/breeze.so
#11 0x00007faaa0d478d9 in QLibraryPrivate::unload(QLibraryPrivate::UnloadFlag) () at /lib64/libQt5Core.so.5
#12 0x00007faaa0d3d8a2 in QFactoryLoaderPrivate::~QFactoryLoaderPrivate() () at /lib64/libQt5Core.so.5
#13 0x00007faaa0d3d9d9 in QFactoryLoaderPrivate::~QFactoryLoaderPrivate() () at /lib64/libQt5Core.so.5
#14 0x00007faaa0d8684c in QObject::~QObject() () at /lib64/libQt5Core.so.5
#15 0x00007faaa0d3ca8a in QFactoryLoader::~QFactoryLoader() () at /lib64/libQt5Core.so.5
#16 0x00007faaa16edd59 in (anonymous namespace)::Q_QGS_loader::innerFunction()::Holder::~Holder() () at /lib64/libQt5Widgets.so.5
#17 0x00007faa9feb2658 in __run_exit_handlers () at /lib64/libc.so.6
#18 0x00007faa9feb26a5 in  () at /lib64/libc.so.6
#19 0x00007faa86a29d08 in QXcbConnection::processXcbEvents() () at /lib64/libQt5XcbQpa.so.5
#20 0x00007faaa0d7fe59 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#21 0x00007faaa16825ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#22 0x00007faaa1687836 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#23 0x00007faaa0d52948 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#24 0x00007faaa0d5480a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#25 0x00007faaa0da76a3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#26 0x00007faa9e5e5e3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#27 0x00007faa9e5e61d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#28 0x00007faa9e5e627c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#29 0x00007faaa0da7aaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#30 0x00007faaa0d5050a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#31 0x00007faaa0d58d4c in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#32 0x00007faa873c919b in kdemain () at /lib64/libkdeinit5_kded5.so
#33 0x000055eba8d6e776 in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) ()
#34 0x000055eba8d6ba92 in main ()

Comment 3 David Faure 2016-04-30 09:12:03 UTC

That is still a crash in Qt.... i.e. wrong bug tracker, I would say.

Comment 4 Martin Kyral 2017-03-08 08:08:16 UTC

The crash did not happen for quite some time, closing.