'[kwin] [Bug 377031] New: kwin crashed after unlock screen (2 local sessions)'

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List:       kde-bugs-dist
Subject:    [kwin] [Bug 377031] New: kwin crashed after unlock screen (2 local sessions)
From:       Thomas Boerkel <bugzilla_noreply () kde ! org>
Date:       2017-02-28 18:13:47
Message-ID: bug-377031-17878 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=377031

            Bug ID: 377031
           Summary: kwin crashed after unlock screen (2 local sessions)
           Product: kwin
           Version: 5.8.5
          Platform: Compiled Sources
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kwin-bugs-null@kde.org
          Reporter: thomas@boerkel.de
  Target Milestone: ---

Application: kwin_x11 (5.8.5)
 (Compiled from sources)
Qt Version: 5.6.2
Frameworks Version: 5.29.0
Operating System: Linux 4.9.6-gentoo-r1 x86_64
Distribution (Platform): Gentoo Packages

-- Information about the crash:
- What I was doing when the application crashed:

The session was locked. I was logged in the other local session and working
normally. Also starting OpenGL applications (MythTV).
When Is switched back and unlocked this session, kwin had crashed.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc4407467c0 (LWP 7049))]

Thread 5 (Thread 0x7fc42be6c700 (LWP 7056)):
#0  0x00007fc44003e5ed in poll () from /lib64/libc.so.6
#1  0x00007fc43f19b8f2 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007fc43f19d6df in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007fc42cf49569 in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007fc43dd4999c in ?? () from /usr/lib64/libQt5Core.so.5
#5  0x00007fc4403004a4 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fc44004766d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7fc429eeb700 (LWP 7078)):
#0  0x00007fc440040303 in select () from /lib64/libc.so.6
#1  0x00007fc43df34621 in qt_safe_select(int, fd_set*, fd_set*, fd_set*,
timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007fc43df35d0e in
QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>,
timespec*) () from /usr/lib64/libQt5Core.so.5
#3  0x00007fc43df3624d in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib64/libQt5Core.so.5
#4  0x00007fc43deea60a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib64/libQt5Core.so.5
#5  0x00007fc43dd45234 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007fc440859235 in ?? () from /usr/lib64/libQt5DBus.so.5
#7  0x00007fc43dd4999c in ?? () from /usr/lib64/libQt5Core.so.5
#8  0x00007fc4403004a4 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fc44004766d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fc41b97a700 (LWP 7124)):
#0  0x00007fc440040303 in select () from /lib64/libc.so.6
#1  0x00007fc43df34621 in qt_safe_select(int, fd_set*, fd_set*, fd_set*,
timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007fc43df35d0e in
QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>,
timespec*) () from /usr/lib64/libQt5Core.so.5
#3  0x00007fc43df3624d in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib64/libQt5Core.so.5
#4  0x00007fc43deea60a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib64/libQt5Core.so.5
#5  0x00007fc43dd45234 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007fc439103405 in ?? () from /usr/lib64/libQt5Qml.so.5
#7  0x00007fc43dd4999c in ?? () from /usr/lib64/libQt5Core.so.5
#8  0x00007fc4403004a4 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fc44004766d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fc411962700 (LWP 7193)):
#0  0x00007fc4403060ff in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#1  0x00007fc43d100204 in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007fc43d100249 in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007fc4403004a4 in start_thread () from /lib64/libpthread.so.0
#4  0x00007fc44004766d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fc4407467c0 (LWP 7049)):
[KCrash Handler]
#6  0x00007fc43ffee489 in ?? () from /lib64/libc.so.6
#7  0x00007fc439b70116 in KWin::GLVertexBuffer::setData
(this=this@entry=0x9cbed0, vertexCount=36, dim=dim@entry=2, vertices=0x997e98,
texcoords=texcoords@entry=0x0) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/libkwineffects/kwinglutils.cpp:2057
#8  0x00007fc43fbf70ce in KWin::SceneOpenGL2::doPaintBackground (this=0x9d6d40,
vertices=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/scene_opengl.cpp:1100
#9  0x00007fc43fbfce35 in KWin::SceneOpenGL::paintBackground
(this=this@entry=0x9d6d40, region=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/scene_opengl.cpp:813
#10 0x00007fc43fbe2359 in KWin::Scene::paintSimpleScreen
(this=this@entry=0x9d6d40, orig_mask=orig_mask@entry=8, region=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/scene.cpp:365
#11 0x00007fc43fbf7053 in KWin::SceneOpenGL2::paintSimpleScreen
(this=this@entry=0x9d6d40, mask=mask@entry=8, region=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/scene_opengl.cpp:1083
#12 0x00007fc43fbe46a5 in KWin::Scene::finalPaintScreen (this=0x9d6d40,
mask=mask@entry=8, region=..., data=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/scene.cpp:201
#13 0x00007fc43fc127df in KWin::EffectsHandlerImpl::paintScreen (this=0x9e7f30,
mask=mask@entry=8, region=..., data=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/effects.cpp:340
#14 0x00007fc43d723ccf in KWin::Effect::paintScreen (this=this@entry=0x893790,
mask=mask@entry=8, region=..., data=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/libkwineffects/kwineffects.cpp:574
#15 0x00007fc43fc1278d in KWin::EffectsHandlerImpl::paintScreen (this=0x9e7f30,
mask=mask@entry=8, region=..., data=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/effects.cpp:337
#16 0x00007fc43d723ccf in KWin::Effect::paintScreen (this=this@entry=0xa08410,
mask=mask@entry=8, region=..., data=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/libkwineffects/kwineffects.cpp:574
#17 0x00007fc43fc1278d in KWin::EffectsHandlerImpl::paintScreen (this=0x9e7f30,
mask=8, region=..., data=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/effects.cpp:337
#18 0x00007fc43fbe4339 in KWin::Scene::paintScreen (this=this@entry=0x9d6d40,
mask=mask@entry=0x7fff1b4ef5b0, damage=..., repaint=...,
updateRegion=updateRegion@entry=0x7fff1b4ef580,
validRegion=validRegion@entry=0x7fff1b4ef590, projection=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/scene.cpp:151
#19 0x00007fc43fbfd8f9 in KWin::SceneOpenGL::paint (this=0x9d6d40, damage=...,
toplevels=...) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/scene_opengl.cpp:731
#20 0x00007fc43fbd6cea in KWin::Compositor::performCompositing (this=0x714110)
at /var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/composite.cpp:742
#21 0x00007fc43df1408b in QObject::event(QEvent*) () from
/usr/lib64/libQt5Core.so.5
#22 0x00007fc43e7809ac in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib64/libQt5Widgets.so.5
#23 0x00007fc43e7850f2 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib64/libQt5Widgets.so.5
#24 0x00007fc43deeba80 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /usr/lib64/libQt5Core.so.5
#25 0x00007fc43df378de in QTimerInfoList::activateTimers() () from
/usr/lib64/libQt5Core.so.5
#26 0x00007fc43df3621b in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib64/libQt5Core.so.5
#27 0x00007fc42cfafe9d in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#28 0x00007fc43deea60a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib64/libQt5Core.so.5
#29 0x00007fc43def20dc in QCoreApplication::exec() () from
/usr/lib64/libQt5Core.so.5
#30 0x00007fc44051e27b in kdemain (argc=1, argv=0x7fff1b4efe08) at
/var/tmp/portage/kde-plasma/kwin-5.8.5/work/kwin-5.8.5/main_x11.cpp:466
#31 0x00007fc43ff80790 in __libc_start_main () from /lib64/libc.so.6
#32 0x0000000000400809 in _start ()

Possible duplicates by query: bug 365274, bug 362496, bug 361609, bug 359374,
bug 355103.

Reported using DrKonqi

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