Application: kwin (4.5.3 (KDE 4.5.3))
KDE Platform Version: 4.5.3 (KDE 4.5.3)
Qt Version: 4.7.0
Operating System: Linux 2.6.36-020636-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
When unlock desktop with screensaver kwin crashes unexpectly

The crash can be reproduced some of the time.

-- Backtrace:
Application: KWin (kwin), signal: Aborted
[Current thread is 1 (Thread 0x7fa2c84477a0 (LWP 1869))]

Thread 3 (Thread 0x7fa2b0373700 (LWP 1880)):
#0  __lll_lock_wait_private () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:97
#1  0x00007fa2c7c631dc in _L_lock_12347 () from /lib/libc.so.6
#2  0x00007fa2c7c61c78 in __libc_free (mem=0x7fa2c7f62e40) at malloc.c:3736
#3  0x00007fa2c44f546c in cleanup (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:62
#4  ~QScopedPointer (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#5  QObject::~QObject (this=<value optimized out>, __in_chrg=<value optimized out>) at kernel/qobject.cpp:963
#6  0x00007fa2c4509ee7 in QEventDispatcherUNIX::~QEventDispatcherUNIX (this=0x7fa2c7f62e40, __in_chrg=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:627
#7  0x00007fa2c43e7ac4 in QThreadPrivate::finish (arg=<value optimized out>) at thread/qthread_unix.cpp:302
#8  0x00007fa2c43e8286 in ~__pthread_cleanup_class (arg=0x7fa2c480df40) at /usr/include/pthread.h:545
#9  QThreadPrivate::start (arg=0x7fa2c480df40) at thread/qthread_unix.cpp:271
#10 0x00007fa2c415d971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#11 0x00007fa2c7cca92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fa2a7ccf700 (LWP 1882)):
#0  __lll_lock_wait_private () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:97
#1  0x00007fa2c7c631dc in _L_lock_12347 () from /lib/libc.so.6
#2  0x00007fa2c7c61c78 in __libc_free (mem=0x7fa2c7f62e40) at malloc.c:3736
#3  0x00007fa2c4509dce in QEventDispatcherUNIX::unregisterSocketNotifier (this=<value optimized out>, notifier=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:802
#4  0x00007fa2c450af77 in QEventDispatcherUNIXPrivate::doSelect (this=0x18c78a0, flags=<value optimized out>, timeout=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:261
#5  0x00007fa2c450b81b in QEventDispatcherUNIX::processEvents (this=0x19055d0, flags=) at kernel/qeventdispatcher_unix.cpp:919
#6  0x00007fa2c44daa02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#7  0x00007fa2c44dadec in QEventLoop::exec (this=0x7fa2a7cced70, flags=) at kernel/qeventloop.cpp:201
#8  0x00007fa2c43e52fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#9  0x00007fa2c44ba5f8 in QInotifyFileSystemWatcherEngine::run (this=0x18c6950) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fa2c43e827e in QThreadPrivate::start (arg=0x18c6950) at thread/qthread_unix.cpp:266
#11 0x00007fa2c415d971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#12 0x00007fa2c7cca92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa2c84477a0 (LWP 1869)):
[KCrash Handler]
#6  0x00007fa2c7c17ba5 in raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#7  0x00007fa2c7c1b6b0 in abort () at abort.c:92
#8  0x00007fa2c7c5143b in __libc_message (do_abort=<value optimized out>, fmt=<value optimized out>) at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
#9  0x00007fa2c7c5b4b6 in malloc_printerr (action=3, str=0x7fa2c7d2f278 "malloc(): smallbin double linked list corrupted", ptr=<value optimized out>) at malloc.c:6283
#10 0x00007fa2c7c5f781 in _int_malloc (av=0x7fa2c7f62e40, bytes=16) at malloc.c:4308
#11 0x00007fa2c7c6038e in __libc_malloc (bytes=16) at malloc.c:3660
#12 0x00007fa2c5ed894a in _XReply () from /usr/lib/libX11.so.6
#13 0x00007fa2c5a19a24 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#14 0x00007fa2c59e5721 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#15 0x00007fa2c5a0b0b1 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#16 0x00007fa2c5a0bea0 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#17 0x00007fa2bd4ca32d in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#18 0x00007fa2bd4cb354 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#19 0x00007fa2bd562ba4 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#20 0x00007fa2bd4090a8 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#21 0x00007fa2bd3997d9 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#22 0x00007fa2bd530931 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#23 0x00007fa2bd530bd8 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#24 0x00007fa2bd4e2763 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#25 0x00007fa2bd356a27 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.256.53
#26 0x00007fa2c802cbc5 in KWin::SceneOpenGL::paintBackground (this=<value optimized out>, region=<value optimized out>) at ../../kwin/scene_opengl.cpp:905
#27 0x00007fa2c8022766 in KWin::Scene::paintGenericScreen (this=0x12d7a30, orig_mask=<value optimized out>) at ../../kwin/scene.cpp:187
#28 0x00007fa2c801faaa in KWin::Scene::finalPaintScreen (this=0x12d7a30, mask=40, region=<value optimized out>, data=...) at ../../kwin/scene.cpp:177
#29 0x00007fa2c8039526 in KWin::EffectsHandlerImpl::paintScreen (this=<value optimized out>, mask=40, region=) at ../../kwin/effects.cpp:172
#30 0x00007fa2aa05474f in KWin::LogoutEffect::paintScreen (this=0x15def30, mask=40, region=<value optimized out>, data=...) at ../../../kwin/effects/logout/logout.cpp:207
#31 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=40, region=) at ../../kwin/effects.cpp:168
#32 0x00007fa2aa08362e in KWin::BlurEffect::paintScreen (this=<value optimized out>, mask=40, region=) at ../../../kwin/effects/blur/blur.cpp:235
#33 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#34 0x00007fa2aa05ab92 in KWin::PresentWindowsEffect::paintScreen (this=0x15fd690, mask=8, region=) at ../../../kwin/effects/presentwindows/presentwindows.cpp:196
#35 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#36 0x00007fa2c65fb91f in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#37 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#38 0x00007fa2c65fb91f in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#39 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#40 0x00007fa2c65fb91f in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#41 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#42 0x00007fa2c65fb91f in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#43 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#44 0x00007fa2c65fb91f in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#45 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#46 0x00007fa2aa03e009 in KWin::DesktopGridEffect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:155
#47 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#48 0x00007fa2aa038b82 in KWin::BoxSwitchEffect::paintScreen (this=0x15ff580, mask=8, region=) at ../../../kwin/effects/boxswitch/boxswitch.cpp:142
#49 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#50 0x00007fa2aa093572 in KWin::CubeEffect::paintScreen (this=<value optimized out>, mask=8, region=) at ../../../kwin/effects/cube/cube.cpp:697
#51 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#52 0x00007fa2aa09a392 in KWin::CubeSlideEffect::paintScreen (this=<value optimized out>, mask=8, region=) at ../../../kwin/effects/cube/cubeslide.cpp:111
#53 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#54 0x00007fa2c65fb91f in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#55 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#56 0x00007fa2aa089e94 in KWin::CoverSwitchEffect::paintScreen (this=0x1608880, mask=8, region=<value optimized out>, data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:124
#57 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#58 0x00007fa2c65fb91f in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#59 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#60 0x00007fa2aa083041 in KWin::ZoomEffect::paintScreen (this=<value optimized out>, mask=8, region=) at ../../../kwin/effects/zoom/zoom.cpp:73
#61 0x00007fa2c80395be in KWin::EffectsHandlerImpl::paintScreen (this=0x1417970, mask=8, region=) at ../../kwin/effects.cpp:168
#62 0x00007fa2c8021195 in KWin::Scene::paintScreen (this=0x12d7a30, mask=0x7fffba6cb99c, region=0x7fffba6cbac0) at ../../kwin/scene.cpp:137
#63 0x00007fa2c8032510 in KWin::SceneOpenGL::paint (this=0x12d7a30, damage=<value optimized out>, toplevels=<value optimized out>) at ../../kwin/scene_opengl.cpp:761
#64 0x00007fa2c801c2a7 in KWin::Workspace::performCompositing (this=<value optimized out>) at ../../kwin/composite.cpp:454
#65 0x00007fa2c7f9d7dd in KWin::Workspace::qt_metacall (this=0x1162ec0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffba6cbc70) at ./workspace.moc:583
#66 0x00007fa2c44f3b27 in QMetaObject::activate (sender=0x1163388, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0xffffffffffffffff) at kernel/qobject.cpp:3280
#67 0x00007fa2c44ed8f9 in QObject::event (this=0x1163388, e=0x74d) at kernel/qobject.cpp:1183
#68 0x00007fa2c3625fdc in QApplicationPrivate::notify_helper (this=0x10c75d0, receiver=0x1163388, e=0x7fffba6cc3c0) at kernel/qapplication.cpp:4396
#69 0x00007fa2c362baed in QApplication::notify (this=0x7fffba6cc7b0, receiver=0x1163388, e=0x7fffba6cc3c0) at kernel/qapplication.cpp:4277
#70 0x00007fa2c77c6526 in KApplication::notify (this=0x7fffba6cc7b0, receiver=0x1163388, event=0x7fffba6cc3c0) at ../../kdeui/kernel/kapplication.cpp:310
#71 0x00007fa2c44dbcdc in QCoreApplication::notifyInternal (this=0x7fffba6cc7b0, receiver=0x1163388, event=0x7fffba6cc3c0) at kernel/qcoreapplication.cpp:732
#72 0x00007fa2c450b6f2 in sendEvent (this=0x10c7fe0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#73 QTimerInfoList::activateTimers (this=0x10c7fe0) at kernel/qeventdispatcher_unix.cpp:602
#74 0x00007fa2c450b82c in QEventDispatcherUNIX::processEvents (this=0x10a3da0, flags=) at kernel/qeventdispatcher_unix.cpp:923
#75 0x00007fa2c36d9c2f in QEventDispatcherX11::processEvents (this=<value optimized out>, flags=) at kernel/qeventdispatcher_x11.cpp:152
#76 0x00007fa2c44daa02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#77 0x00007fa2c44dadec in QEventLoop::exec (this=0x7fffba6cc6f0, flags=) at kernel/qeventloop.cpp:201
#78 0x00007fa2c44deebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#79 0x00007fa2c7fb9f9d in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kwin/main.cpp:531
#80 0x00007fa2c7c02d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffba6ccdb8) at libc-start.c:226
#81 0x0000000000400669 in _start ()

Possible duplicates by query: bug 255771, bug 253841, bug 242391, bug 236519, bug 232041.

Reported using DrKonqi