414805 2019-12-03 20:06:29 +0000 On X11, crash in QScreen::handle() after QXcbIntegration::createPlatformOpenGLContext() 2025-05-09 20:54:21 +0000 1 1 4 Plasma kwin generic-crash 5.17.3 unspecified Linux RESOLVED UPSTREAM https://bugs.kde.org/show_bug.cgi?id=421700 drkonqi, X11-only NOR crash --- 0 edoubrayrie kwin-bugs-null ag8ec41i agentti002x akos+kde alex_scott artx69 asvhen bertil.bonus bnafta charlyghislain coldresplendence contact cristof.mars cunio daniele.bellavista derplip dev.dorrejo dura fargeol+kde fcvejic fuyuyuyuyuyuyuyuyu jackmcslay johannes.derrer jpflorijn kde.matchbook814 kde kolja_20000 koutsofioslefteris krose labsboom matizalejo mike+kde milanota90 milosz.lenczewski nate nickquednow null othello71 pepko94 pk.lehre postix reid rez.open sam sfranky szo w willypaz243 wolfit yamiyukisenpai 0 oldest_to_newest 1894790 0 edoubrayrie 2019-12-03 20:06:29 +0000 Application: kwin_x11 (5.17.3) Qt Version: 5.13.2 Frameworks Version: 5.64.0 Operating System: Linux 4.15.0-70-generic x86_64 Distribution: KDE neon User Edition 5.17 -- Information about the crash: - What I was doing when the application crashed: Clicking around taskbar (including the active window "icon" and the applets icons) - Unusual behavior I noticed: Panel was "recreated" a few times before crashing - Custom settings of the application: dark theme -- Backtrace: Application: KWin (kwin_x11), signal: Segmentation fault Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f20d99ff880 (LWP 3734))] Thread 6 (Thread 0x7f20b75ef700 (LWP 29045)): #0 0x00007f20d6871f79 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #1 0x00007f20d689c230 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #2 0x00007f20d683f06a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #3 0x00007f20d665a3aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f20d665bb52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f20d22ac6db in start_thread (arg=0x7f20b75ef700) at pthread_create.c:463 #6 0x00007f20d936988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 5 (Thread 0x7f20a21f7700 (LWP 9794)): [KCrash Handler] #6 0x00007f20d6e3b3a4 in QScreen::handle() const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #7 0x00007f20c1353b48 in QXcbIntegration::createPlatformOpenGLContext(QOpenGLContext*) const () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #8 0x00007f20d6e5676f in QOpenGLContext::create() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #9 0x00007f20d14385ad in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #10 0x00007f20d1439a24 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #11 0x00007f20d143d2b8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #12 0x00007f20d665bb52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #13 0x00007f20d22ac6db in start_thread (arg=0x7f20a21f7700) at pthread_create.c:463 #14 0x00007f20d936988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 4 (Thread 0x7f20b5984700 (LWP 4267)): #0 0x00007f20d22b29f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f20d5aabfb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f20d22b29f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f20d5aabf68, cond=0x7f20d5aabf90) at pthread_cond_wait.c:502 #2 0x00007f20d22b29f3 in __pthread_cond_wait (cond=0x7f20d5aabf90, mutex=0x7f20d5aabf68) at pthread_cond_wait.c:655 #3 0x00007f20d57b6874 in () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 #4 0x00007f20d57b68b9 in () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 #5 0x00007f20d22ac6db in start_thread (arg=0x7f20b5984700) at pthread_create.c:463 #6 0x00007f20d936988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 3 (Thread 0x7f20b6dee700 (LWP 3946)): #0 0x00007f20d935ccf6 in __GI_ppoll (fds=0x7f20a4000d28, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39 #1 0x00007f20d689a8a1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #2 0x00007f20d689c038 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #3 0x00007f20d683f06a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f20d665a3aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f20d0cb8815 in () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #6 0x00007f20d665bb52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f20d22ac6db in start_thread (arg=0x7f20b6dee700) at pthread_create.c:463 #8 0x00007f20d936988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 2 (Thread 0x7f20bd946700 (LWP 3761)): #0 0x00007f20d935ccf6 in __GI_ppoll (fds=0x7f20b000b948, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39 #1 0x00007f20d689a8a1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #2 0x00007f20d689c038 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #3 0x00007f20d683f06a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f20d665a3aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f20cf8850e5 in () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5 #6 0x00007f20d665bb52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f20d22ac6db in start_thread (arg=0x7f20bd946700) at pthread_create.c:463 #8 0x00007f20d936988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7f20d99ff880 (LWP 3734)): #0 0x00007f20d22b29f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c052cd15b4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f20d22b29f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c052cd1560, cond=0x55c052cd1588) at pthread_cond_wait.c:502 #2 0x00007f20d22b29f3 in __pthread_cond_wait (cond=0x55c052cd1588, mutex=0x55c052cd1560) at pthread_cond_wait.c:655 #3 0x00007f20d6662aeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f20d6662df9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f20d143a0ed in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f20d143c66d in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f20d143cce9 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #8 0x00007f20d6e1f525 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #9 0x00007f20d149ca45 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #10 0x00007f2004b5e4db in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5 #11 0x00007f20d7645eac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #12 0x00007f20d764d4b0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #13 0x00007f20d6840f08 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #14 0x00007f20d6e1541a in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #15 0x00007f20d6e1566d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #16 0x00007f20d6def79b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #17 0x00007f20c1377173 in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #18 0x00007f20d683f06a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #19 0x00007f20d68483e0 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #20 0x00007f20d9641d05 in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so #21 0x00007f20d9269b97 in __libc_start_main (main=0x55c051231720, argc=3, argv=0x7fffdd777da8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffdd777d98) at ../csu/libc-start.c:310 #22 0x000055c05123175a in _start () Possible duplicates by query: bug 414555, bug 411216, bug 403543, bug 401605, bug 381516. Reported using DrKonqi 2001091 1 nate 2021-02-08 19:12:50 +0000 *** Bug 411405 has been marked as a duplicate of this bug. *** 2001093 2 nate 2021-02-08 19:13:06 +0000 *** Bug 415486 has been marked as a duplicate of this bug. *** 2001095 3 nate 2021-02-08 19:13:41 +0000 *** Bug 416228 has been marked as a duplicate of this bug. *** 2001097 4 nate 2021-02-08 19:13:52 +0000 *** Bug 417129 has been marked as a duplicate of this bug. *** 2001099 5 nate 2021-02-08 19:13:58 +0000 *** Bug 416615 has been marked as a duplicate of this bug. *** 2001101 6 nate 2021-02-08 19:17:02 +0000 *** Bug 420597 has been marked as a duplicate of this bug. *** 2001104 7 nate 2021-02-08 19:18:47 +0000 *** Bug 422113 has been marked as a duplicate of this bug. *** 2001108 8 nate 2021-02-08 19:20:02 +0000 *** Bug 414709 has been marked as a duplicate of this bug. *** 2001110 9 nate 2021-02-08 19:20:29 +0000 *** Bug 422283 has been marked as a duplicate of this bug. *** 2001112 10 nate 2021-02-08 19:20:52 +0000 *** Bug 430529 has been marked as a duplicate of this bug. *** 2001114 11 nate 2021-02-08 19:21:25 +0000 *** Bug 422954 has been marked as a duplicate of this bug. *** 2001116 12 nate 2021-02-08 19:22:07 +0000 *** Bug 418206 has been marked as a duplicate of this bug. *** 2001118 13 nate 2021-02-08 19:23:03 +0000 *** Bug 423228 has been marked as a duplicate of this bug. *** 2001120 14 nate 2021-02-08 19:23:13 +0000 *** Bug 432604 has been marked as a duplicate of this bug. *** 2001159 15 nate 2021-02-08 19:33:24 +0000 Looks like a modern incarnation of Bug 341497. See also this variant: Bug 414823. Raising priority due to number of duplicates. 2010074 16 nate 2021-03-08 19:54:05 +0000 *** Bug 434154 has been marked as a duplicate of this bug. *** 2021057 17 nate 2021-03-31 21:18:30 +0000 *** Bug 435058 has been marked as a duplicate of this bug. *** 2021081 18 kde 2021-03-31 23:11:17 +0000 Some initial analysis #6 0x00007f20d6e3b3a4 in QScreen::handle() const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 This just returns the platformScreen, this is set in the ctor, so for a crash to happen here it means the QScreen object has been deleted. In one of the dupes we can see a pointer is sent as this to QScreen::handle, which heavily implies it's a dangling pointer. If someone can reproduce reliably valgrind will tell us in an instant what's wrong. 2021163 19 akos+kde 2021-04-01 07:55:52 +0000 I attached Valgrind to running kwin_x11. It seems kwin crashes many more times than without it. It crashes on Alt+Tabs, closing windows, and minimising windows after returning from sleep (hopefully this is the reproducible case of the current ticket). I observed the following errors: ==18204== Syscall param writev(vector[...]) points to uninitialised byte(s) ==18204== at 0x64F21CD: __writev (writev.c:26) ==18204== by 0x64F21CD: writev (writev.c:24) ==18204== by 0x5B70AD2: UnknownInlinedFun (xcb_conn.c:277) ==18204== by 0x5B70AD2: _xcb_conn_wait.part.0 (xcb_conn.c:523) ==18204== by 0x5B70B8F: UnknownInlinedFun (xcb_out.c:463) ==18204== by 0x5B70B8F: _xcb_out_send (xcb_out.c:464) ==18204== by 0x5B70DE6: UnknownInlinedFun (xcb_out.c:488) ==18204== by 0x5B70DE6: _xcb_out_flush_to (xcb_out.c:477) ==18204== by 0x5B7242A: xcb_request_check (xcb_in.c:743) ==18204== by 0x112601: QtPrivate::QFunctorSlotObject<KWin::ApplicationX11::performStartup()::{lambda()#2}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (main_x11.cpp:243) ==18204== by 0x5F26945: call (qobjectdefs_impl.h:398) ==18204== by 0x5F26945: void doActivate<false>(QObject*, int, void**) (qobject.cpp:3886) ==18204== by 0x4BFF4C2: KSelectionOwner::Private::claimSucceeded() (kselectionowner.cpp:188) ==18204== by 0x4C047A0: UnknownInlinedFun (kselectionowner.cpp:222) ==18204== by 0x4C047A0: KSelectionOwner::filterEvent(void*) (kselectionowner.cpp:406) ==18204== by 0x5EED876: QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (qabstracteventdispatcher.cpp:495) ==18204== by 0xC3540E0: QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (qxcbconnection.cpp:536) ==18204== by 0xC3555F5: QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qxcbconnection.cpp:1014) ==18204== Address 0xa1bfd7a is 4,538 bytes inside a block of size 21,168 alloc'd ==18204== at 0x4840B65: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==18204== by 0x5B73050: xcb_connect_to_fd (xcb_conn.c:346) ==18204== by 0x5B73C46: xcb_connect_to_display_with_auth_info (xcb_util.c:534) ==18204== by 0x7BA40E1: _XConnectXCB (xcb_disp.c:78) ==18204== by 0x7B94124: XOpenDisplay (OpenDis.c:129) ==18204== by 0xC379926: QXcbBasicConnection::QXcbBasicConnection(char const*) (qxcbconnection_basic.cpp:114) ==18204== by 0xC355B21: QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char const*) (qxcbconnection.cpp:91) ==18204== by 0xC358992: QXcbIntegration::QXcbIntegration(QStringList const&, int&, char**) (qxcbintegration.cpp:197) ==18204== by 0x485E45E: create (qxcbmain.cpp:56) ==18204== by 0x485E45E: QXcbIntegrationPlugin::create(QString const&, QStringList const&, int&, char**) (qxcbmain.cpp:53) ==18204== by 0x55B908B: init_platform (qguiapplication.cpp:1223) ==18204== by 0x55B908B: QGuiApplicationPrivate::createPlatformIntegration() (qguiapplication.cpp:1481) ==18204== by 0x55BA48F: QGuiApplicationPrivate::createEventDispatcher() (qguiapplication.cpp:1498) ==18204== by 0x5EF6DB5: QCoreApplicationPrivate::init() (qcoreapplication.cpp:834) ==18204== Uninitialised value was created by a stack allocation ==18204== at 0x4BFF450: KSelectionOwner::Private::claimSucceeded() (kselectionowner.cpp:170) ==18204== Invalid read of size 16 ==18204== at 0x12A6CB01: ??? (in /memfd:sljit (deleted)) ==18204== by 0xD0A5537: ??? ==18204== Address 0xd0a555e is 62 bytes inside a block of size 76 alloc'd ==18204== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==18204== by 0x5D1A490: QArrayData::allocate(unsigned long, unsigned long, unsigned long, QFlags<QArrayData::AllocationOption>) (qarraydata.cpp:218) ==18204== by 0x5D933F9: allocate (qarraydata.h:224) ==18204== by 0x5D933F9: QString::fromLatin1_helper(char const*, int) (qstring.cpp:5459) ==18204== by 0x671CE5D: KWin::GLPlatform::detect(KWin::OpenGLPlatformInterface) (qstring.h:701) ==18204== by 0x128B5AE1: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:196) ==18204== by 0x13181D88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==18204== by 0x13190828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==18204== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==18204== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==18204== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==18204== by 0x4F194FE: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:3632) ==18204== by 0x5EF0329: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==18204== Invalid read of size 16 ==18204== at 0x12A6C6D8: ??? (in /memfd:sljit (deleted)) ==18204== by 0xD0A5537: ??? ==18204== Address 0xd0a555e is 62 bytes inside a block of size 76 alloc'd ==18204== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==18204== by 0x5D1A490: QArrayData::allocate(unsigned long, unsigned long, unsigned long, QFlags<QArrayData::AllocationOption>) (qarraydata.cpp:218) ==18204== by 0x5D933F9: allocate (qarraydata.h:224) ==18204== by 0x5D933F9: QString::fromLatin1_helper(char const*, int) (qstring.cpp:5459) ==18204== by 0x671CE5D: KWin::GLPlatform::detect(KWin::OpenGLPlatformInterface) (qstring.h:701) ==18204== by 0x128B5AE1: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:196) ==18204== by 0x13181D88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==18204== by 0x13190828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==18204== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==18204== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==18204== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==18204== by 0x4F194FE: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:3632) ==18204== by 0x5EF0329: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== Invalid read of size 8 ==16985== at 0x5F44682: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() (qeventdispatcher_unix.cpp:273) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Address 0xce6b038 is 24 bytes inside a block of size 40 free'd ==16985== at 0x483F9AB: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5F453ED: deleteNode (qhash.h:586) ==16985== by 0x5F453ED: QHash<int, QSocketNotifierSetUNIX>::erase(QHash<int, QSocketNotifierSetUNIX>::const_iterator) (qhash.h:886) ==16985== by 0x5CEBFF3: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() [clone .cold] (qeventdispatcher_unix.cpp:281) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Block was alloc'd at ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D49897: QHashData::allocateNode(int) (qhash.cpp:479) ==16985== by 0x5F43F51: createNode (qhash.h:610) ==16985== by 0x5F43F51: operator[] (qhash.h:761) ==16985== by 0x5F43F51: QEventDispatcherUNIX::registerSocketNotifier(QSocketNotifier*) (qeventdispatcher_unix.cpp:408) ==16985== by 0x5F29F66: QSocketNotifier::QSocketNotifier(long long, QSocketNotifier::Type, QObject*) (qsocketnotifier.cpp:170) ==16985== by 0x5BB6099: qDBusAddWatch (qdbusintegrator.cpp:214) ==16985== by 0x7EB4D71: _dbus_watch_list_set_functions (dbus-watch.c:321) ==16985== by 0x7EA3E8C: dbus_connection_set_watch_functions (dbus-connection.c:4966) ==16985== by 0x5BBC957: q_dbus_connection_set_watch_functions (qdbus_symbols_p.h:244) ==16985== by 0x5BBC957: QDBusConnectionPrivate::setConnection(DBusConnection*, QDBusErrorInternal const&) (qdbusintegrator.cpp:1829) ==16985== by 0x5BAB2A5: QDBusConnectionManager::executeConnectionRequest(QDBusConnectionManager::ConnectionRequestData*) (qdbusconnection.cpp:290) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== by 0x5EF02FE: doNotify (qcoreapplication.cpp:1153) ==16985== by 0x5EF02FE: notify (qcoreapplication.cpp:1139) ==16985== by 0x5EF02FE: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== by 0x5EF2D60: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.cpp:1817) ==16985== Invalid read of size 8 ==16985== at 0x5F4469F: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() (qeventdispatcher_unix.cpp:273) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Address 0xce6b040 is 32 bytes inside a block of size 40 free'd ==16985== at 0x483F9AB: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5F453ED: deleteNode (qhash.h:586) ==16985== by 0x5F453ED: QHash<int, QSocketNotifierSetUNIX>::erase(QHash<int, QSocketNotifierSetUNIX>::const_iterator) (qhash.h:886) ==16985== by 0x5CEBFF3: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() [clone .cold] (qeventdispatcher_unix.cpp:281) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Block was alloc'd at ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D49897: QHashData::allocateNode(int) (qhash.cpp:479) ==16985== by 0x5F43F51: createNode (qhash.h:610) ==16985== by 0x5F43F51: operator[] (qhash.h:761) ==16985== by 0x5F43F51: QEventDispatcherUNIX::registerSocketNotifier(QSocketNotifier*) (qeventdispatcher_unix.cpp:408) ==16985== by 0x5F29F66: QSocketNotifier::QSocketNotifier(long long, QSocketNotifier::Type, QObject*) (qsocketnotifier.cpp:170) ==16985== by 0x5BB6099: qDBusAddWatch (qdbusintegrator.cpp:214) ==16985== by 0x7EB4D71: _dbus_watch_list_set_functions (dbus-watch.c:321) ==16985== by 0x7EA3E8C: dbus_connection_set_watch_functions (dbus-connection.c:4966) ==16985== by 0x5BBC957: q_dbus_connection_set_watch_functions (qdbus_symbols_p.h:244) ==16985== by 0x5BBC957: QDBusConnectionPrivate::setConnection(DBusConnection*, QDBusErrorInternal const&) (qdbusintegrator.cpp:1829) ==16985== by 0x5BAB2A5: QDBusConnectionManager::executeConnectionRequest(QDBusConnectionManager::ConnectionRequestData*) (qdbusconnection.cpp:290) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== by 0x5EF02FE: doNotify (qcoreapplication.cpp:1153) ==16985== by 0x5EF02FE: notify (qcoreapplication.cpp:1139) ==16985== by 0x5EF02FE: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== by 0x5EF2D60: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.cpp:1817) ==16985== ==16985== ==16985== Process terminating with default action of signal 11 (SIGSEGV): dumping core ==16985== at 0x6438483: raise (raise.c:45) ==16985== by 0x4BD8E90: KCrash::defaultCrashHandler(int) (kcrash.cpp:576) ==16985== by 0x643852F: ??? (in /lib64/libc-2.33.so) ==16985== by 0x122B15D9: ??? (in /memfd:sljit (deleted)) ==16985== ==16985== FILE DESCRIPTORS: 3 open at exit. ==16985== Open file descriptor 2: /dev/pts/5 ==16985== <inherited from parent> ==16985== ==16985== Open file descriptor 1: /dev/pts/5 ==16985== <inherited from parent> ==16985== ==16985== Open file descriptor 0: /dev/null ==16985== <inherited from parent> ==16985== 1 errors in context 2 of 96: ==16985== Invalid read of size 16 ==16985== at 0x122B1B01: ??? (in /memfd:sljit (deleted)) ==16985== by 0x123B1567: ??? ==16985== Address 0x123b158e is 62 bytes inside a block of size 76 alloc'd ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D1A490: QArrayData::allocate(unsigned long, unsigned long, unsigned long, QFlags<QArrayData::AllocationOption>) (qarraydata.cpp:218) ==16985== by 0x5D933F9: allocate (qarraydata.h:224) ==16985== by 0x5D933F9: QString::fromLatin1_helper(char const*, int) (qstring.cpp:5459) ==16985== by 0x671CE5D: KWin::GLPlatform::detect(KWin::OpenGLPlatformInterface) (qstring.h:701) ==16985== by 0x134B5AE1: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:196) ==16985== by 0x1228AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==16985== by 0x12299828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==16985== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==16985== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==16985== by 0x4987E92: KWin::Compositor::reinitialize() (composite.cpp:560) ==16985== by 0x5F26945: call (qobjectdefs_impl.h:398) ==16985== by 0x5F26945: void doActivate<false>(QObject*, int, void**) (qobject.cpp:3886) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== ==16985== ==16985== 1 errors in context 3 of 96: ==16985== Invalid read of size 16 ==16985== at 0x122B1B01: ??? (in /memfd:sljit (deleted)) ==16985== by 0xDEAB157: ??? ==16985== Address 0xdeab17e is 62 bytes inside a block of size 76 alloc'd ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D1A490: QArrayData::allocate(unsigned long, unsigned long, unsigned long, QFlags<QArrayData::AllocationOption>) (qarraydata.cpp:218) ==16985== by 0x5D933F9: allocate (qarraydata.h:224) ==16985== by 0x5D933F9: QString::fromLatin1_helper(char const*, int) (qstring.cpp:5459) ==16985== by 0x671CE5D: KWin::GLPlatform::detect(KWin::OpenGLPlatformInterface) (qstring.h:701) ==16985== by 0x134B5AE1: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:196) ==16985== by 0x1228AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==16985== by 0x12299828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==16985== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==16985== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== by 0x4F194FE: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:3632) ==16985== by 0x5EF0329: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== ==16985== ==16985== 2 errors in context 4 of 96: ==16985== Invalid read of size 16 ==16985== at 0x122B16D8: ??? (in /memfd:sljit (deleted)) ==16985== by 0x123B1567: ??? ==16985== Address 0x123b158e is 62 bytes inside a block of size 76 alloc'd ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D1A490: QArrayData::allocate(unsigned long, unsigned long, unsigned long, QFlags<QArrayData::AllocationOption>) (qarraydata.cpp:218) ==16985== by 0x5D933F9: allocate (qarraydata.h:224) ==16985== by 0x5D933F9: QString::fromLatin1_helper(char const*, int) (qstring.cpp:5459) ==16985== by 0x671CE5D: KWin::GLPlatform::detect(KWin::OpenGLPlatformInterface) (qstring.h:701) ==16985== by 0x134B5AE1: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:196) ==16985== by 0x1228AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==16985== by 0x12299828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==16985== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==16985== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==16985== by 0x4987E92: KWin::Compositor::reinitialize() (composite.cpp:560) ==16985== by 0x5F26945: call (qobjectdefs_impl.h:398) ==16985== by 0x5F26945: void doActivate<false>(QObject*, int, void**) (qobject.cpp:3886) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== ==16985== ==16985== 2 errors in context 5 of 96: ==16985== Invalid read of size 16 ==16985== at 0x122B16D8: ??? (in /memfd:sljit (deleted)) ==16985== by 0xDEAB157: ??? ==16985== Address 0xdeab17e is 62 bytes inside a block of size 76 alloc'd ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D1A490: QArrayData::allocate(unsigned long, unsigned long, unsigned long, QFlags<QArrayData::AllocationOption>) (qarraydata.cpp:218) ==16985== by 0x5D933F9: allocate (qarraydata.h:224) ==16985== by 0x5D933F9: QString::fromLatin1_helper(char const*, int) (qstring.cpp:5459) ==16985== by 0x671CE5D: KWin::GLPlatform::detect(KWin::OpenGLPlatformInterface) (qstring.h:701) ==16985== by 0x134B5AE1: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:196) ==16985== by 0x1228AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==16985== by 0x12299828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==16985== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==16985== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== by 0x4F194FE: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:3632) ==16985== by 0x5EF0329: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== ==16985== ==16985== 3 errors in context 6 of 96: ==16985== Thread 3 QDBusConnectionM: ==16985== Invalid read of size 8 ==16985== at 0x5F4469F: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() (qeventdispatcher_unix.cpp:273) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Address 0xce6b040 is 32 bytes inside a block of size 40 free'd ==16985== at 0x483F9AB: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5F453ED: deleteNode (qhash.h:586) ==16985== by 0x5F453ED: QHash<int, QSocketNotifierSetUNIX>::erase(QHash<int, QSocketNotifierSetUNIX>::const_iterator) (qhash.h:886) ==16985== by 0x5CEBFF3: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() [clone .cold] (qeventdispatcher_unix.cpp:281) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Block was alloc'd at ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D49897: QHashData::allocateNode(int) (qhash.cpp:479) ==16985== by 0x5F43F51: createNode (qhash.h:610) ==16985== by 0x5F43F51: operator[] (qhash.h:761) ==16985== by 0x5F43F51: QEventDispatcherUNIX::registerSocketNotifier(QSocketNotifier*) (qeventdispatcher_unix.cpp:408) ==16985== by 0x5F29F66: QSocketNotifier::QSocketNotifier(long long, QSocketNotifier::Type, QObject*) (qsocketnotifier.cpp:170) ==16985== by 0x5BB6099: qDBusAddWatch (qdbusintegrator.cpp:214) ==16985== by 0x7EB4D71: _dbus_watch_list_set_functions (dbus-watch.c:321) ==16985== by 0x7EA3E8C: dbus_connection_set_watch_functions (dbus-connection.c:4966) ==16985== by 0x5BBC957: q_dbus_connection_set_watch_functions (qdbus_symbols_p.h:244) ==16985== by 0x5BBC957: QDBusConnectionPrivate::setConnection(DBusConnection*, QDBusErrorInternal const&) (qdbusintegrator.cpp:1829) ==16985== by 0x5BAB2A5: QDBusConnectionManager::executeConnectionRequest(QDBusConnectionManager::ConnectionRequestData*) (qdbusconnection.cpp:290) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== by 0x5EF02FE: doNotify (qcoreapplication.cpp:1153) ==16985== by 0x5EF02FE: notify (qcoreapplication.cpp:1139) ==16985== by 0x5EF02FE: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== by 0x5EF2D60: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.cpp:1817) ==16985== ==16985== ==16985== 3 errors in context 7 of 96: ==16985== Invalid read of size 8 ==16985== at 0x5F44682: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() (qeventdispatcher_unix.cpp:273) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Address 0xce6b038 is 24 bytes inside a block of size 40 free'd ==16985== at 0x483F9AB: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5F453ED: deleteNode (qhash.h:586) ==16985== by 0x5F453ED: QHash<int, QSocketNotifierSetUNIX>::erase(QHash<int, QSocketNotifierSetUNIX>::const_iterator) (qhash.h:886) ==16985== by 0x5CEBFF3: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() [clone .cold] (qeventdispatcher_unix.cpp:281) ==16985== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==16985== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Block was alloc'd at ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5D49897: QHashData::allocateNode(int) (qhash.cpp:479) ==16985== by 0x5F43F51: createNode (qhash.h:610) ==16985== by 0x5F43F51: operator[] (qhash.h:761) ==16985== by 0x5F43F51: QEventDispatcherUNIX::registerSocketNotifier(QSocketNotifier*) (qeventdispatcher_unix.cpp:408) ==16985== by 0x5F29F66: QSocketNotifier::QSocketNotifier(long long, QSocketNotifier::Type, QObject*) (qsocketnotifier.cpp:170) ==16985== by 0x5BB6099: qDBusAddWatch (qdbusintegrator.cpp:214) ==16985== by 0x7EB4D71: _dbus_watch_list_set_functions (dbus-watch.c:321) ==16985== by 0x7EA3E8C: dbus_connection_set_watch_functions (dbus-connection.c:4966) ==16985== by 0x5BBC957: q_dbus_connection_set_watch_functions (qdbus_symbols_p.h:244) ==16985== by 0x5BBC957: QDBusConnectionPrivate::setConnection(DBusConnection*, QDBusErrorInternal const&) (qdbusintegrator.cpp:1829) ==16985== by 0x5BAB2A5: QDBusConnectionManager::executeConnectionRequest(QDBusConnectionManager::ConnectionRequestData*) (qdbusconnection.cpp:290) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== by 0x5EF02FE: doNotify (qcoreapplication.cpp:1153) ==16985== by 0x5EF02FE: notify (qcoreapplication.cpp:1139) ==16985== by 0x5EF02FE: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== by 0x5EF2D60: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.cpp:1817) ==16985== ==16985== ==16985== 110 errors in context 8 of 96: ==16985== Thread 1: ==16985== Syscall param writev(vector[...]) points to uninitialised byte(s) ==16985== at 0x64F21CD: __writev (writev.c:26) ==16985== by 0x64F21CD: writev (writev.c:24) ==16985== by 0x5B70AD2: UnknownInlinedFun (xcb_conn.c:277) ==16985== by 0x5B70AD2: _xcb_conn_wait.part.0 (xcb_conn.c:523) ==16985== by 0x5B70B8F: UnknownInlinedFun (xcb_out.c:463) ==16985== by 0x5B70B8F: _xcb_out_send (xcb_out.c:464) ==16985== by 0x5B70DE6: UnknownInlinedFun (xcb_out.c:488) ==16985== by 0x5B70DE6: _xcb_out_flush_to (xcb_out.c:477) ==16985== by 0x5B7242A: xcb_request_check (xcb_in.c:743) ==16985== by 0x112601: QtPrivate::QFunctorSlotObject<KWin::ApplicationX11::performStartup()::{lambda()#2}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (main_x11.cpp:243) ==16985== by 0x5F26945: call (qobjectdefs_impl.h:398) ==16985== by 0x5F26945: void doActivate<false>(QObject*, int, void**) (qobject.cpp:3886) ==16985== by 0x4BFF4C2: KSelectionOwner::Private::claimSucceeded() (kselectionowner.cpp:188) ==16985== by 0x4C047A0: UnknownInlinedFun (kselectionowner.cpp:222) ==16985== by 0x4C047A0: KSelectionOwner::filterEvent(void*) (kselectionowner.cpp:406) ==16985== by 0x5EED876: QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (qabstracteventdispatcher.cpp:495) ==16985== by 0xC3540E0: QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (qxcbconnection.cpp:536) ==16985== by 0xC3555F5: QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qxcbconnection.cpp:1014) ==16985== Address 0xa1bfd7a is 4,538 bytes inside a block of size 21,168 alloc'd ==16985== at 0x4840B65: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0x5B73050: xcb_connect_to_fd (xcb_conn.c:346) ==16985== by 0x5B73C46: xcb_connect_to_display_with_auth_info (xcb_util.c:534) ==16985== by 0x7BA40E1: _XConnectXCB (xcb_disp.c:78) ==16985== by 0x7B94124: XOpenDisplay (OpenDis.c:129) ==16985== by 0xC379926: QXcbBasicConnection::QXcbBasicConnection(char const*) (qxcbconnection_basic.cpp:114) ==16985== by 0xC355B21: QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char const*) (qxcbconnection.cpp:91) ==16985== by 0xC358992: QXcbIntegration::QXcbIntegration(QStringList const&, int&, char**) (qxcbintegration.cpp:197) ==16985== by 0x485E45E: create (qxcbmain.cpp:56) ==16985== by 0x485E45E: QXcbIntegrationPlugin::create(QString const&, QStringList const&, int&, char**) (qxcbmain.cpp:53) ==16985== by 0x55B908B: init_platform (qguiapplication.cpp:1223) ==16985== by 0x55B908B: QGuiApplicationPrivate::createPlatformIntegration() (qguiapplication.cpp:1481) ==16985== by 0x55BA48F: QGuiApplicationPrivate::createEventDispatcher() (qguiapplication.cpp:1498) ==16985== by 0x5EF6DB5: QCoreApplicationPrivate::init() (qcoreapplication.cpp:834) ==16985== Uninitialised value was created by a stack allocation ==16985== at 0x4BFF450: KSelectionOwner::Private::claimSucceeded() (kselectionowner.cpp:170) ==16985== ==16985== ==16985== 670 errors in context 9 of 96: ==16985== Thread 7 Thread (pooled): ==16985== Conditional jump or move depends on uninitialised value(s) ==16985== at 0xEEF521D: glXWaitVideoSyncSGI (in /usr/lib64/libGLX_nvidia.so.460.67) ==16985== by 0x134B07A2: KWin::SGIVideoSyncVsyncMonitorHelper::poll() (sgivideosyncvsyncmonitor.cpp:122) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== by 0x4F194FE: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:3632) ==16985== by 0x5EF0329: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==16985== by 0x5EF2D60: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.cpp:1817) ==16985== by 0x5F44D89: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:468) ==16985== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==16985== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==16985== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==16985== by 0x6E67298: start_thread (pthread_create.c:473) ==16985== by 0x64FB3B2: clone (clone.S:95) ==16985== Uninitialised value was created by a stack allocation ==16985== at 0x5F17F50: QMetaCallEvent::placeMetaCall(QObject*) (qobject.cpp:613) I saw many of these repeated, however, I think they are not very helpful: ==18205== 1 errors in context 866 of 868: ==18205== Conditional jump or move depends on uninitialised value(s) ==18205== at 0xEF0C3DE: ??? (in /memfd:sljit (deleted)) ==18205== by 0xB5A6E77: ??? kwin_x11 related leaks: ==16985== Thread 1: ==16985== 8 bytes in 1 blocks are definitely lost in loss record 414 of 14,666 ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0xEEF3798: glXChooseFBConfig (in /usr/lib64/libGLX_nvidia.so.460.67) ==16985== by 0x92A3FE6: glXChooseFBConfig (libglx.c:1491) ==16985== by 0xE5FD8B4: QGLXContext::init(QXcbScreen*, QPlatformOpenGLContext*, QVariant const&) (qglxintegration.cpp:484) ==16985== by 0xE5FC1D6: QXcbGlxIntegration::createPlatformOpenGLContext(QOpenGLContext*) const (qxcbglxintegration.cpp:191) ==16985== by 0x560889C: QOpenGLContext::create() (qopenglcontext.cpp:612) ==16985== by 0x134B5A9D: UnknownInlinedFun (glxbackend.cpp:380) ==16985== by 0x134B5A9D: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:189) ==16985== by 0x1228AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==16985== by 0x12299828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==16985== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==16985== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==16985== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==16985== ==16985== 8 bytes in 1 blocks are definitely lost in loss record 415 of 14,666 ==16985== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==16985== by 0xEEF3798: glXChooseFBConfig (in /usr/lib64/libGLX_nvidia.so.460.67) ==16985== by 0x92A3FE6: glXChooseFBConfig (libglx.c:1491) ==16985== by 0xE5FD8B4: QGLXContext::init(QXcbScreen*, QPlatformOpenGLContext*, QVariant const&) (qglxintegration.cpp:484) ==16985== by 0xE5FC1D6: QXcbGlxIntegration::createPlatformOpenGLContext(QOpenGLContext*) const (qxcbglxintegration.cpp:191) ==16985== by 0x560889C: QOpenGLContext::create() (qopenglcontext.cpp:612) ==16985== by 0x134B5A9D: UnknownInlinedFun (glxbackend.cpp:380) ==16985== by 0x134B5A9D: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:189) ==16985== by 0x1228AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==16985== by 0x12299828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==16985== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==16985== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==16985== by 0x4987E92: KWin::Compositor::reinitialize() (composite.cpp:560) I hope these traces are useful; if not, I'll gladly collect more. The core files created during crashes are still available in case you need them. Operating System: openSUSE Tumbleweed 20210330 KDE Plasma Version: 5.21.3 KDE Frameworks Version: 5.80.0 Qt Version: 5.15.2 Kernel Version: 5.11.6-1-default OS Type: 64-bit Graphics Platform: X11 Graphics Processor: GeForce GTX 960/PCIe/SSE2 2021246 20 akos+kde 2021-04-01 15:05:45 +0000 During the day kwin was running in Valgrind and it crashed seven times and produced 19 different Valgrind .log files. I tried my best to de-duplicate the error and leak messages there (there were many repeating). Here come the errors from Valgrind: ==18204== Thread 7 vsync event moni: ==18204== Conditional jump or move depends on uninitialised value(s) ==18204== at 0xEEF521D: glXWaitVideoSyncSGI (in /usr/lib64/libGLX_nvidia.so.460.67) ==18204== by 0x128B07A2: KWin::SGIVideoSyncVsyncMonitorHelper::poll() (sgivideosyncvsyncmonitor.cpp:122) ==18204== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==18204== by 0x4F194FE: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:3632) ==18204== by 0x5EF0329: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==18204== by 0x5EF2D60: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.cpp:1817) ==18204== by 0x5F44D89: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:468) ==18204== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==18204== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==18204== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==18204== by 0x6E67298: start_thread (pthread_create.c:473) ==18204== by 0x64FB3B2: clone (clone.S:95) ==18204== Uninitialised value was created by a stack allocation ==18204== at 0x5F17F50: QMetaCallEvent::placeMetaCall(QObject*) (qobject.cpp:613) ==23403== Invalid read of size 16 ==23403== at 0x122B1B01: ??? (in /memfd:sljit (deleted)) ==23403== by 0xD0C4EB7: ??? ==23403== Address 0xd0c4ede is 62 bytes inside a block of size 76 alloc'd ==23403== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==23403== by 0x5D1A490: QArrayData::allocate(unsigned long, unsigned long, unsigned long, QFlags<QArrayData::AllocationOption>) (qarraydata.cpp:218) ==23403== by 0x5D933F9: allocate (qarraydata.h:224) ==23403== by 0x5D933F9: QString::fromLatin1_helper(char const*, int) (qstring.cpp:5459) ==23403== by 0x671CE5D: KWin::GLPlatform::detect(KWin::OpenGLPlatformInterface) (qstring.h:701) ==23403== by 0x134B5AE1: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:196) ==23403== by 0x1228AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==23403== by 0x12299828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==23403== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==23403== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==23403== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==23403== by 0x4F194FE: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:3632) ==23403== by 0x5EF0329: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==23403== Syscall param writev(vector[...]) points to uninitialised byte(s) ==23403== at 0x64F21CD: __writev (writev.c:26) ==23403== by 0x64F21CD: writev (writev.c:24) ==23403== by 0x5B70AD2: UnknownInlinedFun (xcb_conn.c:277) ==23403== by 0x5B70AD2: _xcb_conn_wait.part.0 (xcb_conn.c:523) ==23403== by 0x5B70B8F: UnknownInlinedFun (xcb_out.c:463) ==23403== by 0x5B70B8F: _xcb_out_send (xcb_out.c:464) ==23403== by 0x5B70DE6: UnknownInlinedFun (xcb_out.c:488) ==23403== by 0x5B70DE6: _xcb_out_flush_to (xcb_out.c:477) ==23403== by 0x5B7242A: xcb_request_check (xcb_in.c:743) ==23403== by 0x112601: QtPrivate::QFunctorSlotObject<KWin::ApplicationX11::performStartup()::{lambda()#2}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (main_x11.cpp:243) ==23403== by 0x5F26945: call (qobjectdefs_impl.h:398) ==23403== by 0x5F26945: void doActivate<false>(QObject*, int, void**) (qobject.cpp:3886) ==23403== by 0x4BFF4C2: KSelectionOwner::Private::claimSucceeded() (kselectionowner.cpp:188) ==23403== by 0x4C047A0: UnknownInlinedFun (kselectionowner.cpp:222) ==23403== by 0x4C047A0: KSelectionOwner::filterEvent(void*) (kselectionowner.cpp:406) ==23403== by 0x5EED876: QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (qabstracteventdispatcher.cpp:495) ==23403== by 0xC3540E0: QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (qxcbconnection.cpp:536) ==23403== by 0xC3555F5: QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qxcbconnection.cpp:1014) ==23403== Address 0xa1bfd7a is 4,538 bytes inside a block of size 21,168 alloc'd ==23403== at 0x4840B65: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==23403== by 0x5B73050: xcb_connect_to_fd (xcb_conn.c:346) ==23403== by 0x5B73C46: xcb_connect_to_display_with_auth_info (xcb_util.c:534) ==23403== by 0x7BA40E1: _XConnectXCB (xcb_disp.c:78) ==23403== by 0x7B94124: XOpenDisplay (OpenDis.c:129) ==23403== by 0xC379926: QXcbBasicConnection::QXcbBasicConnection(char const*) (qxcbconnection_basic.cpp:114) ==23403== by 0xC355B21: QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char const*) (qxcbconnection.cpp:91) ==23403== by 0xC358992: QXcbIntegration::QXcbIntegration(QStringList const&, int&, char**) (qxcbintegration.cpp:197) ==23403== by 0x485E45E: create (qxcbmain.cpp:56) ==23403== by 0x485E45E: QXcbIntegrationPlugin::create(QString const&, QStringList const&, int&, char**) (qxcbmain.cpp:53) ==23403== by 0x55B908B: init_platform (qguiapplication.cpp:1223) ==23403== by 0x55B908B: QGuiApplicationPrivate::createPlatformIntegration() (qguiapplication.cpp:1481) ==23403== by 0x55BA48F: QGuiApplicationPrivate::createEventDispatcher() (qguiapplication.cpp:1498) ==23403== by 0x5EF6DB5: QCoreApplicationPrivate::init() (qcoreapplication.cpp:834) ==23403== Uninitialised value was created by a stack allocation ==23403== at 0x4BFF450: KSelectionOwner::Private::claimSucceeded() (kselectionowner.cpp:170) ==24377== Thread 3 QDBusConnectionM: ==24377== Invalid read of size 8 ==24377== at 0x5F44682: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() (qeventdispatcher_unix.cpp:273) ==24377== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==24377== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==24377== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==24377== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==24377== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==24377== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==24377== by 0x6E67298: start_thread (pthread_create.c:473) ==24377== by 0x64FB3B2: clone (clone.S:95) ==24377== Address 0xd261c08 is 24 bytes inside a block of size 40 free'd ==24377== at 0x483F9AB: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==24377== by 0x5F453ED: deleteNode (qhash.h:586) ==24377== by 0x5F453ED: QHash<int, QSocketNotifierSetUNIX>::erase(QHash<int, QSocketNotifierSetUNIX>::const_iterator) (qhash.h:886) ==24377== by 0x5CEBFF3: QEventDispatcherUNIXPrivate::markPendingSocketNotifiers() [clone .cold] (qeventdispatcher_unix.cpp:281) ==24377== by 0x5F44BB3: QEventDispatcherUNIXPrivate::activateSocketNotifiers() (qeventdispatcher_unix.cpp:294) ==24377== by 0x5F4508A: QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qeventdispatcher_unix.cpp:511) ==24377== by 0x5EEECEA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (qeventloop.cpp:232) ==24377== by 0x5D0DDAD: QThread::exec() (qthread.cpp:547) ==24377== by 0x5BAA7B6: QDBusConnectionManager::run() (qdbusconnection.cpp:179) ==24377== by 0x5D0EEF0: QThreadPrivate::start(void*) (qthread_unix.cpp:329) ==24377== by 0x6E67298: start_thread (pthread_create.c:473) ==24377== by 0x64FB3B2: clone (clone.S:95) ==24377== Block was alloc'd at ==24377== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==24377== by 0x5D49897: QHashData::allocateNode(int) (qhash.cpp:479) ==24377== by 0x5F43F51: createNode (qhash.h:610) ==24377== by 0x5F43F51: operator[] (qhash.h:761) ==24377== by 0x5F43F51: QEventDispatcherUNIX::registerSocketNotifier(QSocketNotifier*) (qeventdispatcher_unix.cpp:408) ==24377== by 0x5F29F66: QSocketNotifier::QSocketNotifier(long long, QSocketNotifier::Type, QObject*) (qsocketnotifier.cpp:170) ==24377== by 0x5BB6099: qDBusAddWatch (qdbusintegrator.cpp:214) ==24377== by 0x7EB4D71: _dbus_watch_list_set_functions (dbus-watch.c:321) ==24377== by 0x7EA3E8C: dbus_connection_set_watch_functions (dbus-connection.c:4966) ==24377== by 0x5BBC957: q_dbus_connection_set_watch_functions (qdbus_symbols_p.h:244) ==24377== by 0x5BBC957: QDBusConnectionPrivate::setConnection(DBusConnection*, QDBusErrorInternal const&) (qdbusintegrator.cpp:1829) ==24377== by 0x5BAB3BF: QDBusConnectionManager::executeConnectionRequest(QDBusConnectionManager::ConnectionRequestData*) (qdbusconnection.cpp:290) ==24377== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==24377== by 0x5EF02FE: doNotify (qcoreapplication.cpp:1153) ==24377== by 0x5EF02FE: notify (qcoreapplication.cpp:1139) ==24377== by 0x5EF02FE: QCoreApplication::notifyInternal2(QObject*, QEvent*) (qcoreapplication.cpp:1063) ==24377== by 0x5EF2D60: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.cpp:1817) ==26719== Conditional jump or move depends on uninitialised value(s) ==26719== at 0x682D9D6: isPossibleCell (Collector.cpp:785) ==26719== by 0x682D9D6: QTJSC::Heap::markConservatively(QTJSC::MarkStack&, void*, void*) (Collector.cpp:807) ==26719== by 0x682DC0F: QTJSC::Heap::markCurrentThreadConservativelyInternal(QTJSC::MarkStack&) (Collector.cpp:834) ==26719== by 0x682DC97: QTJSC::Heap::markCurrentThreadConservatively(QTJSC::MarkStack&) (Collector.cpp:856) ==26719== by 0x682E2FF: markStackObjectsConservatively (Collector.cpp:1008) ==26719== by 0x682E2FF: QTJSC::Heap::markRoots() (Collector.cpp:1148) ==26719== by 0x682E60E: reset (Collector.cpp:1269) ==26719== by 0x682E60E: QTJSC::Heap::allocate(unsigned long) (Collector.cpp:405) ==26719== by 0x68CC6DA: operator new (JSCell.h:162) ==26719== by 0x68CC6DA: QScriptContext::argumentsObject() const (qscriptcontext.cpp:348) ==26719== by 0x68CCCDD: QScriptContext::argument(int) const (qscriptcontext.cpp:281) ==26719== by 0x4A3E33C: KWin::kwinEffectRetarget(QScriptContext*, QScriptEngine*) (scriptedeffect.cpp:408) ==26719== by 0x68F7778: QScript::FunctionWrapper::proxyCall(QTJSC::ExecState*, QTJSC::JSObject*, QTJSC::JSValue, QTJSC::ArgList const&) (qscriptfunction.cpp:98) ==26719== by 0x682D46D: QTJSC::NativeFuncWrapper::operator()(QTJSC::ExecState*, QTJSC::JSObject*, QTJSC::JSValue, QTJSC::ArgList const&) const (CallData.cpp:46) ==26719== by 0x680A732: cti_op_call_NotJSFunction (JITStubs.cpp:1780) ==26719== by 0x59CEEA19: ??? ==26719== Uninitialised value was created by a stack allocation ==26719== at 0x682DB50: QTJSC::Heap::markCurrentThreadConservativelyInternal(QTJSC::MarkStack&) (Collector.cpp:830) ==26719== Conditional jump or move depends on uninitialised value(s) ==26719== at 0x682DA5D: QTJSC::Heap::markConservatively(QTJSC::MarkStack&, void*, void*) (Collector.cpp:820) ==26719== by 0x682DC0F: QTJSC::Heap::markCurrentThreadConservativelyInternal(QTJSC::MarkStack&) (Collector.cpp:834) ==26719== by 0x682DC97: QTJSC::Heap::markCurrentThreadConservatively(QTJSC::MarkStack&) (Collector.cpp:856) ==26719== by 0x682E2FF: markStackObjectsConservatively (Collector.cpp:1008) ==26719== by 0x682E2FF: QTJSC::Heap::markRoots() (Collector.cpp:1148) ==26719== by 0x682E60E: reset (Collector.cpp:1269) ==26719== by 0x682E60E: QTJSC::Heap::allocate(unsigned long) (Collector.cpp:405) ==26719== by 0x68CC6DA: operator new (JSCell.h:162) ==26719== by 0x68CC6DA: QScriptContext::argumentsObject() const (qscriptcontext.cpp:348) ==26719== by 0x68CCCDD: QScriptContext::argument(int) const (qscriptcontext.cpp:281) ==26719== by 0x4A3E33C: KWin::kwinEffectRetarget(QScriptContext*, QScriptEngine*) (scriptedeffect.cpp:408) ==26719== by 0x68F7778: QScript::FunctionWrapper::proxyCall(QTJSC::ExecState*, QTJSC::JSObject*, QTJSC::JSValue, QTJSC::ArgList const&) (qscriptfunction.cpp:98) ==26719== by 0x682D46D: QTJSC::NativeFuncWrapper::operator()(QTJSC::ExecState*, QTJSC::JSObject*, QTJSC::JSValue, QTJSC::ArgList const&) const (CallData.cpp:46) ==26719== by 0x680A732: cti_op_call_NotJSFunction (JITStubs.cpp:1780) ==26719== by 0x59CEEA19: ??? ==26719== Uninitialised value was created by a stack allocation ==26719== at 0x682DC70: QTJSC::Heap::markCurrentThreadConservatively(QTJSC::MarkStack&) (Collector.cpp:844) ==30515== Use of uninitialised value of size 8 ==30515== at 0x682DA68: get (Collector.h:215) ==30515== by 0x682DA68: isCellMarked (Collector.h:269) ==30515== by 0x682DA68: append (JSCell.h:329) ==30515== by 0x682DA68: QTJSC::Heap::markConservatively(QTJSC::MarkStack&, void*, void*) (Collector.cpp:822) ==30515== by 0x682DC0F: QTJSC::Heap::markCurrentThreadConservativelyInternal(QTJSC::MarkStack&) (Collector.cpp:834) ==30515== by 0x682DC97: QTJSC::Heap::markCurrentThreadConservatively(QTJSC::MarkStack&) (Collector.cpp:856) ==30515== by 0x682E2FF: markStackObjectsConservatively (Collector.cpp:1008) ==30515== by 0x682E2FF: QTJSC::Heap::markRoots() (Collector.cpp:1148) ==30515== by 0x682E60E: reset (Collector.cpp:1269) ==30515== by 0x682E60E: QTJSC::Heap::allocate(unsigned long) (Collector.cpp:405) ==30515== by 0x6848399: operator new (JSCell.h:162) ==30515== by 0x6848399: jsString (JSString.h:445) ==30515== by 0x6848399: QTJSC::InternalFunction::InternalFunction(QTJSC::JSGlobalData*, QTWTF::NonNullPassRefPtr<QTJSC::Structure>, QTJSC::Identifier const&) (InternalFunction.cpp:43) ==30515== by 0x68FE370: QScript::QtPropertyFunction::QtPropertyFunction(QMetaObject const*, int, QTJSC::JSGlobalData*, QTWTF::PassRefPtr<QTJSC::Structure>, QTJSC::Identifier const&) (qscriptqobject.cpp:1061) ==30515== by 0x6907CD0: QScript::QObjectDelegate::getOwnPropertySlot(QScriptObject*, QTJSC::ExecState*, QTJSC::Identifier const&, QTJSC::PropertySlot&) (qscriptqobject.cpp:1262) ==30515== by 0x67CD57C: fastGetOwnPropertySlot (JSObject.h:382) ==30515== by 0x67CD57C: QTJSC::JSValue::get(QTJSC::ExecState*, QTJSC::Identifier const&, QTJSC::PropertySlot&) const (JSObject.h:618) ==30515== by 0x6806FEE: cti_op_get_by_id_generic (JITStubs.cpp:1237) ==30515== by 0x59CE5AEC: ??? ==30515== by 0x67BFE39: execute (JITCode.h:79) ==30515== by 0x67BFE39: QTJSC::Interpreter::execute(QTJSC::FunctionExecutable*, QTJSC::ExecState*, QTJSC::JSFunction*, QTJSC::JSObject*, QTJSC::ArgList const&, QTJSC::ScopeChainNode*, QTJSC::JSValue*) (Interpreter.cpp:718) ==30515== Uninitialised value was created by a stack allocation ==30515== at 0x6907697: QScript::QObjectDelegate::getOwnPropertySlot(QScriptObject*, QTJSC::ExecState*, QTJSC::Identifier const&, QTJSC::PropertySlot&) (qscriptqobject.cpp:1206) ==26719== Conditional jump or move depends on uninitialised value(s) ==26719== at 0x68FC3E7: append (JSCell.h:329) ==26719== by 0x68FC3E7: append (JSCell.h:340) ==26719== by 0x68FC3E7: QScript::QtFunction::markChildren(QTJSC::MarkStack&) (qscriptqobject.cpp:238) ==26719== by 0x682F9C4: markChildren (JSArray.h:178) ==26719== by 0x682F9C4: QTJSC::MarkStack::drain() (JSArray.h:220) ==26719== by 0x682DA96: QTJSC::Heap::markConservatively(QTJSC::MarkStack&, void*, void*) (Collector.cpp:823) ==26719== by 0x682DC0F: QTJSC::Heap::markCurrentThreadConservativelyInternal(QTJSC::MarkStack&) (Collector.cpp:834) ==26719== by 0x682DC97: QTJSC::Heap::markCurrentThreadConservatively(QTJSC::MarkStack&) (Collector.cpp:856) ==26719== by 0x682E2FF: markStackObjectsConservatively (Collector.cpp:1008) ==26719== by 0x682E2FF: QTJSC::Heap::markRoots() (Collector.cpp:1148) ==26719== by 0x682E60E: reset (Collector.cpp:1269) ==26719== by 0x682E60E: QTJSC::Heap::allocate(unsigned long) (Collector.cpp:405) ==26719== by 0x68CC6DA: operator new (JSCell.h:162) ==26719== by 0x68CC6DA: QScriptContext::argumentsObject() const (qscriptcontext.cpp:348) ==26719== by 0x68CCCDD: QScriptContext::argument(int) const (qscriptcontext.cpp:281) ==26719== by 0x4A3E33C: KWin::kwinEffectRetarget(QScriptContext*, QScriptEngine*) (scriptedeffect.cpp:408) ==26719== by 0x68F7778: QScript::FunctionWrapper::proxyCall(QTJSC::ExecState*, QTJSC::JSObject*, QTJSC::JSValue, QTJSC::ArgList const&) (qscriptfunction.cpp:98) ==26719== by 0x682D46D: QTJSC::NativeFuncWrapper::operator()(QTJSC::ExecState*, QTJSC::JSObject*, QTJSC::JSValue, QTJSC::ArgList const&) const (CallData.cpp:46) ==26719== Uninitialised value was created by a stack allocation ==26719== at 0x4A3E215: KWin::kwinEffectRetarget(QScriptContext*, QScriptEngine*) (scriptedeffect.cpp:402) 2021247 21 akos+kde 2021-04-01 15:06:33 +0000 Here are the reported definite leaks: ==23403== 128 (24 direct, 104 indirect) bytes in 1 blocks are definitely lost in loss record 715 of 1,029 ==23403== at 0x483EDEF: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==23403== by 0x49BDDD4: KWin::Workspace::registerEventFilter(KWin::X11EventFilter*) (events.cpp:171) ==23403== by 0x1349E201: KWin::X11StandalonePlatform::createScreenEdge(KWin::ScreenEdges*) (screenedges_filter.cpp:20) ==23403== by 0x4A332F4: KWin::ScreenEdges::createEdge(KWin::ElectricBorder, int, int, int, int, bool) (screenedge.cpp:1106) ==23403== by 0x4A342A2: KWin::ScreenEdges::createVerticalEdge(KWin::ElectricBorder, QRect const&, QRect const&) (screenedge.cpp:1061) ==23403== by 0x4A34792: KWin::ScreenEdges::recreateEdges() (screenedge.cpp:1001) ==23403== by 0x4A8DE54: KWin::Workspace::init() (workspace.cpp:218) ==23403== by 0x4A8CE82: KWin::Workspace::Workspace() (workspace.cpp:204) ==23403== by 0x49FE22F: KWin::Application::createWorkspace() (main.cpp:272) ==23403== by 0x111D08: KWin::ApplicationX11::continueStartupWithScreens() (main_x11.cpp:272) ==23403== by 0x5F26945: call (qobjectdefs_impl.h:398) ==23403== by 0x5F26945: void doActivate<false>(QObject*, int, void**) (qobject.cpp:3886) ==23403== by 0x134AE5D8: void KWin::X11StandalonePlatform::doUpdateOutputs<KWin::Xcb::RandR::ScreenResources>() (x11_platform.cpp:603) ==23403== 128 (24 direct, 104 indirect) bytes in 1 blocks are definitely lost in loss record 720 of 1,029 ==23403== at 0x483EDEF: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==23403== by 0x49BDDD4: KWin::Workspace::registerEventFilter(KWin::X11EventFilter*) (events.cpp:171) ==23403== by 0x4AC1C71: KWin::X11EventFilter::X11EventFilter(int, int, int) (x11eventfilter.cpp:25) ==23403== by 0x134A41FF: KWin::X11StandalonePlatform::init() (x11_platform.cpp:66) ==23403== by 0x1127E6: QtPrivate::QFunctorSlotObject<KWin::ApplicationX11::performStartup()::{lambda()#2}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (main_x11.cpp:259) ==23403== by 0x5F26945: call (qobjectdefs_impl.h:398) ==23403== by 0x5F26945: void doActivate<false>(QObject*, int, void**) (qobject.cpp:3886) ==23403== by 0x4BFF4C2: KSelectionOwner::Private::claimSucceeded() (kselectionowner.cpp:188) ==23403== by 0x4C047A0: UnknownInlinedFun (kselectionowner.cpp:222) ==23403== by 0x4C047A0: KSelectionOwner::filterEvent(void*) (kselectionowner.cpp:406) ==23403== by 0x5EED876: QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (qabstracteventdispatcher.cpp:495) ==23403== by 0xC3540E0: QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (qxcbconnection.cpp:536) ==23403== by 0xC3555F5: QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qxcbconnection.cpp:1014) ==23403== by 0xC37835B: QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (qxcbeventdispatcher.cpp:61) ==24377== 8 bytes in 1 blocks are definitely lost in loss record 758 of 21,144 ==24377== at 0x483E77F: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==24377== by 0xEEF3798: glXChooseFBConfig (in /usr/lib64/libGLX_nvidia.so.460.67) ==24377== by 0x92A3FE6: glXChooseFBConfig (libglx.c:1491) ==24377== by 0xE5FD8B4: QGLXContext::init(QXcbScreen*, QPlatformOpenGLContext*, QVariant const&) (qglxintegration.cpp:484) ==24377== by 0xE5FC1D6: QXcbGlxIntegration::createPlatformOpenGLContext(QOpenGLContext*) const (qxcbglxintegration.cpp:191) ==24377== by 0x560889C: QOpenGLContext::create() (qopenglcontext.cpp:612) ==24377== by 0x128AFA9D: UnknownInlinedFun (glxbackend.cpp:380) ==24377== by 0x128AFA9D: KWin::GlxBackend::init() [clone .part.0] (glxbackend.cpp:189) ==24377== by 0x1268AD88: KWin::SceneOpenGL::createScene(QObject*) (scene_opengl.cpp:449) ==24377== by 0x12699828: KWin::OpenGLFactory::create(QObject*) const (scene_opengl.cpp:2725) ==24377== by 0x4985E2E: KWin::Compositor::setupStart() [clone .part.0] (composite.cpp:238) ==24377== by 0x4988B59: KWin::X11Compositor::start() (composite.cpp:815) ==24377== by 0x5F1C350: QObject::event(QEvent*) (qobject.cpp:1314) ==24377== 16 bytes in 2 blocks are definitely lost in loss record 1,669 of 21,144 ==24377== at 0x483F50F: operator new[](unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==24377== by 0x77489FE: QLinkedStringHash<QPair<int, QQmlPropertyData*> >::linkAndReserve(QLinkedStringHash<QPair<int, QQmlPropertyData*> > const&, int) (qlinkedstringhash_p.h:82) ==24377== by 0x77440B1: copy (qqmlpropertycache.cpp:262) ==24377== by 0x77440B1: QQmlPropertyCache::copyAndReserve(int, int, int, int) (qqmlpropertycache.cpp:278) ==24377== by 0x76F05E0: QQmlPropertyCacheCreator<QV4::ExecutableCompilationUnit>::createMetaObject(int, QV4::CompiledData::Object const*, QQmlRefPointer<QQmlPropertyCache> const&) (qqmlpropertycachecreator_p.h:351) ==24377== by 0x76F2156: QQmlPropertyCacheCreator<QV4::ExecutableCompilationUnit>::buildMetaObjectRecursively(int, QQmlBindingInstantiationContext const&, QQmlPropertyCacheCreator<QV4::ExecutableCompilationUnit>::VMEMetaObjectIsRequired) (qqmlpropertycachecreator_p.h:269) ==24377== by 0x76F2CD5: QQmlPropertyCacheCreator<QV4::ExecutableCompilationUnit>::buildMetaObjects() (qqmlpropertycachecreator_p.h:213) ==24377== by 0x76EA11B: QQmlTypeData::createTypeAndPropertyCaches(QQmlRefPointer<QQmlTypeNameCache> const&, QV4::ResolvedTypeReferenceMap const&) (qqmltypedata.cpp:247) ==24377== by 0x76EBF93: QQmlTypeData::done() (qqmltypedata.cpp:457) ==24377== by 0x76D9E04: tryDone (qqmldatablob.cpp:524) ==24377== by 0x76D9E04: QQmlDataBlob::tryDone() (qqmldatablob.cpp:515) ==24377== by 0x7733B74: QQmlTypeLoader::setData(QQmlDataBlob*, QQmlDataBlob::SourceCodeData const&) (qqmltypeloader.cpp:457) ==24377== by 0x7734231: QQmlTypeLoader::setData(QQmlDataBlob*, QString const&) (qqmltypeloader.cpp:437) ==24377== by 0x77354AB: QQmlTypeLoader::loadThread(QQmlDataBlob*) (qqmltypeloader.cpp:299) ==24377== 40 bytes in 5 blocks are definitely lost in loss record 8,895 of 21,144 ==24377== at 0x483F50F: operator new[](unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==24377== by 0x7744AE6: linkAndReserve (qlinkedstringhash_p.h:82) ==24377== by 0x7744AE6: copy (qqmlpropertycache.cpp:262) ==24377== by 0x7744AE6: QQmlPropertyCache::copy() (qqmlpropertycache.cpp:272) ==24377== by 0x7729E04: QQmlMetaTypeData::propertyCache(QQmlType const&, int) (qqmlmetatypedata.cpp:175) ==24377== by 0x771DC11: QQmlMetaType::propertyCache(QQmlType const&, int) (qqmlmetatype.cpp:1242) ==24377== by 0x76E6CCD: cache (qqmlengine_p.h:410) ==24377== by 0x76E6CCD: cache (qqmlengine_p.h:402) ==24377== by 0x76E6CCD: QQmlTypeData::buildTypeResolutionCaches(QQmlRefPointer<QQmlTypeNameCache>*, QV4::ResolvedTypeReferenceMap*) const (qqmltypedata.cpp:975) ==24377== by 0x76EAEB2: QQmlTypeData::done() (qqmltypedata.cpp:424) ==24377== by 0x76D9E04: tryDone (qqmldatablob.cpp:524) ==24377== by 0x76D9E04: QQmlDataBlob::tryDone() (qqmldatablob.cpp:515) ==24377== by 0x7733B74: QQmlTypeLoader::setData(QQmlDataBlob*, QQmlDataBlob::SourceCodeData const&) (qqmltypeloader.cpp:457) ==24377== by 0x7734231: QQmlTypeLoader::setData(QQmlDataBlob*, QString const&) (qqmltypeloader.cpp:437) ==24377== by 0x77354AB: QQmlTypeLoader::loadThread(QQmlDataBlob*) (qqmltypeloader.cpp:299) ==24377== by 0x76F459C: QQmlTypeLoaderThread::loadThread(QQmlDataBlob*) (qqmltypeloaderthread.cpp:162) ==24377== by 0x77A674E: QQmlThreadPrivate::threadEvent() (qqmlthread.cpp:198) 2021250 22 kde 2021-04-01 15:31:56 +0000 I'm not so much interested in the leaks, but I want a trace of a time when we're calling createPlatformOpenGLContext with an invalid screen 2021438 23 akos+kde 2021-04-01 21:42:51 +0000 I usually get this kind of crash when I regularly switch between the two inputs (DisplayPort and HDMI) of my monitor. I'll continue testing with this pattern in a few days, therefore anyone who has a better reproducible or can jump in sooner, feel free to do :). On a related note, may I ask what will be the fate of the other kwin Valgrind errors from Comment 20? Should I open separate bug tickets for them? As kwin crashes under Valgrind quite often it'd also ease further debugging if we didn't need to filter out duplicate reportings. 2039742 24 dura 2021-06-11 10:21:37 +0000 For me it usually happen after a VT switch. Trying to reproduce it with plasmashell under valgrind leads to this use after free that makes me think it's a pure QT bug: ==1964973== Invalid read of size 8 ==1964973== at 0x631FB85: ??? (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x60857E9: QOpenGLContextGroupPrivate::deletePendingResources(QOpenGLContext*) (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x608763B: QOpenGLSharedResource::free() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x631FC29: QOpenGLTextureCache::invalidateResource() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087796: QOpenGLMultiGroupSharedResource::cleanup(QOpenGLContextGroup*, QOpenGLSharedResource*) (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087867: QOpenGLContextGroupPrivate::cleanup() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087E37: QOpenGLContextGroupPrivate::removeContext(QOpenGLContext*) (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087FAD: QOpenGLContext::destroy() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6088229: QOpenGLContext::create() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x4E0C7C3: ??? (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x4E0E58D: ??? (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x4E0F2A6: ??? (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x66A58A9: ??? (in /usr/qt5/lib/libQt5Core.so.5.15.2) ==1964973== by 0x797AD1D: start_thread (in /usr/lib/libpthread-2.33.so) ==1964973== by 0x6DD05BE: clone (in /usr/lib/libc-2.33.so) ==1964973== Address 0x3646e6a0 is 96 bytes inside a block of size 2,936 free'd ==1964973== at 0x4840B52: operator delete(void*, unsigned long) (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so) ==1964973== by 0x60857B5: QOpenGLContextGroupPrivate::deletePendingResources(QOpenGLContext*) (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x608763B: QOpenGLSharedResource::free() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087707: QOpenGLMultiGroupSharedResource::cleanup(QOpenGLContextGroup*, QOpenGLSharedResource*) (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087867: QOpenGLContextGroupPrivate::cleanup() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087E37: QOpenGLContextGroupPrivate::removeContext(QOpenGLContext*) (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6087FAD: QOpenGLContext::destroy() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6088229: QOpenGLContext::create() (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x4E0C7C3: ??? (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x4E0E58D: ??? (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x4E0F2A6: ??? (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x66A58A9: ??? (in /usr/qt5/lib/libQt5Core.so.5.15.2) ==1964973== by 0x797AD1D: start_thread (in /usr/lib/libpthread-2.33.so) ==1964973== by 0x6DD05BE: clone (in /usr/lib/libc-2.33.so) ==1964973== Block was alloc'd at ==1964973== at 0x483DF82: operator new(unsigned long) (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so) ==1964973== by 0x6313078: ??? (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x63131EE: QOpenGLFunctions::QOpenGLFunctions(QOpenGLContext*) (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x6085211: QOpenGLContext::functions() const (in /usr/qt5/lib/libQt5Gui.so.5.15.2) ==1964973== by 0x4E01EC4: QSGDefaultRenderContext::initialize(QSGRenderContext::InitParams const*) (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x4E0F4DB: ??? (in /usr/qt5/lib/libQt5Quick.so.5.15.2) ==1964973== by 0x66A58A9: ??? (in /usr/qt5/lib/libQt5Core.so.5.15.2) ==1964973== by 0x797AD1D: start_thread (in /usr/lib/libpthread-2.33.so) ==1964973== by 0x6DD05BE: clone (in /usr/lib/libc-2.33.so) In the next days, I will try to reproduce it again with a QT debug build. 2043538 25 kde 2021-06-25 12:18:04 +0000 Found it: QPlatformOpenGLContext *QXcbIntegration::createPlatformOpenGLContext(QOpenGLContext *context) const { - QXcbScreen *screen = static_cast<QXcbScreen *>(context->screen()->handle()); - QXcbGlIntegration *glIntegration = screen->connection()->glIntegration(); + QXcbGlIntegration *glIntegration = defaultConnection()->glIntegration(); It appears it is fixed in Qt6 with 590ac717a2c073292027111d5c99d68fb17b160c I'll see if we can get it backported. 2043556 26 dura 2021-06-25 14:13:39 +0000 1e39b39ddb478719682948bed329e891b26d7bf6 and 590ac717a2c073292027111d5c99d68fb17b160c apply cleanly on qt 5.15.2. Do you think it would be enough? 2043561 27 kde 2021-06-25 14:43:34 +0000 I would suggest taking https://invent.kde.org/qt/qt/qtbase/-/merge_requests/33 as a backportable patch. 2044064 28 kde 2021-06-28 17:07:56 +0000 *** Bug 439005 has been marked as a duplicate of this bug. *** 2044173 29 kde 2021-06-29 09:31:03 +0000 *** Bug 414823 has been marked as a duplicate of this bug. *** 2048249 30 kde 2021-07-22 08:12:38 +0000 *** Bug 440124 has been marked as a duplicate of this bug. *** 2057431 31 nate 2021-08-30 16:12:25 +0000 *** Bug 441744 has been marked as a duplicate of this bug. *** 2059711 32 nate 2021-09-08 21:20:46 +0000 *** Bug 442126 has been marked as a duplicate of this bug. *** 2072226 33 nate 2021-10-25 23:12:49 +0000 *** Bug 444386 has been marked as a duplicate of this bug. *** 2077166 34 nate 2021-11-12 22:12:39 +0000 *** Bug 445327 has been marked as a duplicate of this bug. *** 2080141 35 nate 2021-11-23 22:30:46 +0000 *** Bug 445498 has been marked as a duplicate of this bug. *** 2082409 36 nate 2021-12-03 16:49:10 +0000 *** Bug 445498 has been marked as a duplicate of this bug. *** 2092396 37 nate 2022-01-12 01:33:07 +0000 *** Bug 447751 has been marked as a duplicate of this bug. *** 2092444 38 akos+kde 2022-01-12 08:10:58 +0000 I see the backport was merged into KDE Qt repos 6 months ago. I use openSUSE Tumbleweed 20220103 with libqt5 5.15.2+kde268-1.1 (so its seems it has KDE patches). For some reason I still daily meet this crash after I change monitor outputs (once for KWin after an Alt+Tab, then in Krunner when I press Alt+F2, finally in plasmashell when I click on volume slider). In the distro libqt5 changelog (https://build.opensuse.org/package/view_file/openSUSE:Factory/libqt5-qtbase/libqt5-qtbase.changes?expand=1 ) I don't see the explicit mentioning of this backport fix, however, I do see that it's getting the sources from invent.kde (https://build.opensuse.org/package/view_file/openSUSE:Factory/libqt5-qtbase/_service?expand=1 ) My question is, how certain you are that this patch fixed the issue or should I post some backtraces to verify whether we're talking about the same crash? 2098854 39 akos+kde 2022-01-27 22:40:38 +0000 I reported the phenomenon I referred above in Bug 449270 separately to be able to track it independently. 2099013 40 nicolas.fella 2022-01-28 12:52:29 +0000 *** Bug 449288 has been marked as a duplicate of this bug. *** 2101055 41 146271 akos+kde 2022-02-04 19:03:30 +0000 Created attachment 146271 New crash information added by DrKonqi plasmashell (5.23.4) using Qt 5.15.2 Unfortunately, it seems that the very same crash happens with the Qt patch applied (my libqt5-base version is 5.15.2+kde268). Once after each monitor input change I can reproduce it. I understand that this is a Qt problem (presumably), however, the number of duplicates tells that it widely affects KDE users. My question is, despite that this is an external problem, should we reopen it? Do other people face the same problem also with KDE-patched Qt? -- Backtrace (Reduced): #6 0x00007f32b4a46794 in QScreen::handle() const (this=0x559f268d9ca0) at kernel/qscreen.cpp:182 #7 0x00007f32aec95150 in QXcbGlxIntegration::createPlatformOpenGLContext(QOpenGLContext*) const (this=<optimized out>, context=0x7f32a80043b0) at qxcbglxintegration.cpp:195 #8 0x00007f32b4a63bed in QOpenGLContext::create() (this=0x7f32a80043b0) at kernel/qopenglcontext.cpp:612 #9 0x00007f32b60924b8 in QSGRenderThread::sync(bool, bool) (this=this@entry=0x559f29d4a650, inExpose=inExpose@entry=true, inGrab=inGrab@entry=false) at /usr/src/debug/libqt5-qtdeclarative-5.15.2+kde36-1.3.x86_64/src/quick/scenegraph/qsgthreadedrenderloop.cpp:620 #10 0x00007f32b609425c in QSGRenderThread::syncAndRender(QImage*) (this=0x559f29d4a650, grabImage=0x0) at /usr/src/debug/libqt5-qtdeclarative-5.15.2+kde36-1.3.x86_64/src/quick/scenegraph/qsgthreadedrenderloop.cpp:778 2253104 42 nate 2023-09-14 21:12:21 +0000 *** Bug 471417 has been marked as a duplicate of this bug. *** 2254464 43 nate 2023-09-20 19:15:01 +0000 *** Bug 474721 has been marked as a duplicate of this bug. *** 2255846 44 nate 2023-09-28 19:23:41 +0000 *** Bug 474935 has been marked as a duplicate of this bug. *** 2258199 45 nate 2023-10-11 21:29:48 +0000 *** This bug has been marked as a duplicate of bug 474973 *** 2258201 46 nate 2023-10-11 21:30:11 +0000 Thaaaat wasn't what I meant to do, oops 2258203 47 nate 2023-10-11 21:30:23 +0000 *** Bug 475350 has been marked as a duplicate of this bug. *** 2258771 48 nate 2023-10-13 21:04:21 +0000 *** Bug 475545 has been marked as a duplicate of this bug. *** 2259403 49 nate 2023-10-16 19:47:23 +0000 *** Bug 475618 has been marked as a duplicate of this bug. *** 2259604 50 nate 2023-10-17 17:55:00 +0000 *** Bug 475739 has been marked as a duplicate of this bug. *** 2261863 51 nate 2023-10-27 15:37:54 +0000 *** Bug 415485 has been marked as a duplicate of this bug. *** 2264487 52 nate 2023-11-09 20:25:40 +0000 *** Bug 476713 has been marked as a duplicate of this bug. *** 2276205 53 nicolas.fella 2023-12-23 14:34:52 +0000 *** Bug 478941 has been marked as a duplicate of this bug. *** 2276207 54 nicolas.fella 2023-12-23 14:35:36 +0000 *** Bug 478183 has been marked as a duplicate of this bug. *** 2283344 55 fanzhuyifan 2024-01-26 07:34:57 +0000 *** Bug 480308 has been marked as a duplicate of this bug. *** 2288765 56 nate 2024-02-14 20:19:15 +0000 *** Bug 481190 has been marked as a duplicate of this bug. *** 2288822 57 nate 2024-02-15 02:51:36 +0000 *** Bug 481022 has been marked as a duplicate of this bug. *** 2288853 58 nate 2024-02-15 05:25:32 +0000 *** Bug 479408 has been marked as a duplicate of this bug. *** 2294711 59 nate 2024-03-04 19:25:06 +0000 Demoting this from being a VHI priority bug since the X11 session is no longer default in Plasma 6. I'm also interested in learning whether anyone using X11 on Plasma 6 can still reproduce the issue. 2294717 60 bnafta 2024-03-04 19:32:53 +0000 I use KDE Neon and preferably use X11 sessions. I did the update process for Plasma 6 via "sudo pkcon refresh && sudo pkcon update -v ; flatpak update -y" and then restarted. I don't know if this is a new bug, however when putting KDE Neon into sleep mode and waking it up, instead of seeing the login screen I only see the mouse arrow on a 100% black screen on all monitors. The login screen does not return even after waiting a few minutes and then I am forced to open a terminal session (CRTL + ALT + F4) and perform a manual restart, which involves having to manually kill all instances of Google Chrome (so as not to lose my open tabs) and only then perform reboot. 2294718 61 nate 2024-03-04 19:36:04 +0000 That is a different bug, yes. This one is about a crash in QScreen::handle() after QXcbIntegration::createPlatformOpenGLContext(). 2297622 62 nickquednow 2024-03-09 02:57:44 +0000 (In reply to Nate Graham from comment #59) > Demoting this from being a VHI priority bug since the X11 session is no > longer default in Plasma 6. > > I'm also interested in learning whether anyone using X11 on Plasma 6 can > still reproduce the issue. I can test this on my Debian 12 system. I am not super fimiliar with the organization of the repositories, and I am assuming that I am targeting the xdg-desktop-portal-kde project? 2298093 63 nate 2024-03-10 03:07:51 +0000 You'll need to upgrade everything to Plasma 6, not just one package. It's something typically a distro does for you, either in your main repo once their ready, or a "testing" repo you enable yourself. Regardless, let's avoid discussing the details of how to perform system upgrades, as 36 people are CCd to this bug report and probably will not appreciate the email spam resulting from it. 2309929 64 nate 2024-04-09 22:44:47 +0000 *** Bug 483633 has been marked as a duplicate of this bug. *** 2323991 65 kde 2024-06-02 16:50:31 +0000 *** Bug 487909 has been marked as a duplicate of this bug. *** 2323993 66 kde 2024-06-02 16:50:33 +0000 *** Bug 485021 has been marked as a duplicate of this bug. *** 2337490 67 kde 2024-07-15 13:03:21 +0000 *** Bug 489744 has been marked as a duplicate of this bug. *** 2337492 68 kde 2024-07-15 13:03:33 +0000 *** Bug 474368 has been marked as a duplicate of this bug. *** 2345482 69 nate 2024-08-13 19:04:11 +0000 *** Bug 483134 has been marked as a duplicate of this bug. *** 2345516 70 nate 2024-08-13 20:36:22 +0000 *** Bug 491439 has been marked as a duplicate of this bug. *** 2345886 71 nate 2024-08-15 13:57:10 +0000 *** Bug 491747 has been marked as a duplicate of this bug. *** 2349113 72 nate 2024-08-27 18:47:42 +0000 *** Bug 492190 has been marked as a duplicate of this bug. *** 2349528 73 nate 2024-08-28 18:22:01 +0000 *** Bug 492317 has been marked as a duplicate of this bug. *** 2360258 74 kde 2024-09-26 21:28:58 +0000 There appear to be no new traces on Qt 6. Given the crash is deep in Qt code and RHI refactored a lot I think we can call this resolved. 2405629 75 179201 szo 2025-03-07 08:53:04 +0000 Created attachment 179201 New crash information added by DrKonqi plasmashell (5.24.7) using Qt 5.15.3 - What I was doing when the application crashed: Attaching HDMI monitor to the laptop - Unusual behavior I noticed: After a while, but not immediately, plasmashell crashes - Custom settings of the application: -- Backtrace (Reduced): #4 0x00007f2ea16a6cf8 in QScreen::handle() const () at /lib/x86_64-linux-gnu/libQt5Gui.so.5 #5 0x00007f2e9bdb4ccc in QXcbIntegration::createPlatformOpenGLContext(QOpenGLContext*) const () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #6 0x00007f2ea16c4891 in QOpenGLContext::create() () at /lib/x86_64-linux-gnu/libQt5Gui.so.5 [...] #11 0x00007f2ea0c1bac3 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442 #12 0x00007f2ea0cad850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 2406317 76 cwo.kde 2025-03-10 08:35:07 +0000 *** Bug 501253 has been marked as a duplicate of this bug. *** 2422611 77 nate 2025-05-09 20:52:47 +0000 *** Bug 503975 has been marked as a duplicate of this bug. *** 146271 2022-02-04 19:03:30 +0000 2022-02-04 19:03:30 +0000 New crash information added by DrKonqi plasmashell-20220204-193620.kcrash text/plain 19434 akos+kde QXBwbGljYXRpb246IHBsYXNtYXNoZWxsICg1LjIzLjQpCgpRdCBWZXJzaW9uOiA1LjE1LjIKRnJh bWV3b3JrcyBWZXJzaW9uOiA1Ljg5LjAKT3BlcmF0aW5nIFN5c3RlbTogTGludXggNS4xNS4xMi0x LWRlZmF1bHQgeDg2XzY0CldpbmRvd2luZyBTeXN0ZW06IFgxMQpEaXN0cmlidXRpb246ICJvcGVu U1VTRSBUdW1ibGV3ZWVkIgpEcktvbnFpOiA1LjIzLjQgW0tDcmFzaEJhY2tlbmRdCgotLSBJbmZv cm1hdGlvbiBhYm91dCB0aGUgY3Jhc2g6ClVuZm9ydHVuYXRlbHksIGl0IHNlZW1zIHRoYXQgdGhl IHZlcnkgc2FtZSBjcmFzaCBoYXBwZW5zIHdpdGggdGhlIFF0IHBhdGNoIGFwcGxpZWQgKG15IGxp YnF0NS1iYXNlIHZlcnNpb24gaXMgNS4xNS4yK2tkZTI2OCkuIE9uY2UgYWZ0ZXIgZWFjaCBtb25p dG9yIGlucHV0IGNoYW5nZSBJIGNhbiByZXByb2R1Y2UgaXQuCgpJIHVuZGVyc3RhbmQgdGhhdCB0 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