https://bugs.kde.org/show_bug.cgi?id=472013
Bug ID: 472013
Summary: Unmapping an xdg_toplevel with an existing xdg_popup
causes a segfault in
KWin::XdgPopupWindow::sendRoleConfigure
Classification: Plasma
Product: kwin
Version: 5.27.6
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: core
Assignee: kwin-bugs-n...@kde.org
Reporter: vyi...@eclair.cafe
Target Milestone: ---
Thread 1 "kwin" received signal SIGSEGV, Segmentation fault.
0x00007ffff7981db4 in KWin::XdgPopupWindow::sendRoleConfigure
(this=0x555556763e80)
at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/xdgshellwindow.cpp:1960
1960 const QPointF parentPosition =
transientFor()->framePosToClientPos(transientFor()->pos());
(gdb) bt
#0 0x00007ffff7981db4 in KWin::XdgPopupWindow::sendRoleConfigure() const
(this=0x555556763e80)
at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/xdgshellwindow.cpp:1960
#1 0x00007ffff7974197 in KWin::XdgSurfaceWindow::sendConfigure()
(this=0x555556763e80)
at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/xdgshellwindow.cpp:131
#2 0x00007ffff5ee8461 in QtPrivate::QSlotObjectBase::call(QObject*, void**)
(a=0x7fffffffd9e0, r=<optimized out>, this=0x55555691c6c0)
at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#3 doActivate<false>(QObject*, int, void**) (sender=0x55555675b350,
signal_index=3, argv=0x7fffffffd9e0)
at kernel/qobject.cpp:3925
#4 0x00007ffff5ee3387 in QMetaObject::activate(QObject*, QMetaObject const*,
int, void**)
(sender=<optimized out>, m=m@entry=0x7ffff6166560
<QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0,
argv=argv@entry=0x7fffffffd9e0) at kernel/qobject.cpp:3985
#5 0x00007ffff5eeb9dd in QTimer::timeout(QTimer::QPrivateSignal)
(this=<optimized out>, _t1=...) at .moc/moc_qtimer.cpp:205
#6 0x00007ffff5edec8b in QObject::event(QEvent*) (this=0x55555675b350,
e=0x7fffffffdb50) at kernel/qobject.cpp:1369
#7 0x00007ffff53aeb75 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
(this=<optimized out>, receiver=0x55555675b350, e=0x7fffffffdb50) at
kernel/qapplication.cpp:3640
#8 0x00007ffff5eb4188 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
(receiver=0x55555675b350, event=0x7fffffffdb50)
at kernel/qcoreapplication.cpp:1064
#9 0x00007ffff5eb43a2 in QCoreApplication::sendEvent(QObject*, QEvent*)
(receiver=<optimized out>, event=<optimized out>)
at kernel/qcoreapplication.cpp:1462
#10 0x00007ffff5f05a7b in QTimerInfoList::activateTimers()
(this=this@entry=0x5555557302d8) at kernel/qtimerinfo_unix.cpp:643
#11 0x00007ffff5f02e30 in QEventDispatcherUNIXPrivate::activateTimers()
(this=this@entry=0x555555730250)
at kernel/qeventdispatcher_unix.cpp:249
#12 0x00007ffff5f03c80 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:516
#13 0x00005555556962c2 in
QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
()
#14 0x00007ffff5eb2b4b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7fffffffdcf0, flags=...,
flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:69
#15 0x00007ffff5ebaddb in QCoreApplication::exec() () at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#16 0x00007ffff6360edd in QGuiApplication::exec() () at
kernel/qguiapplication.cpp:1863
#17 0x00007ffff53aeae9 in QApplication::exec() () at
kernel/qapplication.cpp:2832
#18 0x00005555555afe44 in main(int, char**) (argc=<optimized out>,
argv=<optimized out>)
at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/main_wayland.cpp:628
(gdb) call transientFor()
$1 = (const KWin::Window *) 0x0
STEPS TO REPRODUCE
1. Run `build/cases/xdg_toplevel_unmap_before_popup` from randfall [1].
OBSERVED RESULT
KWin crashes due to a segfault.
EXPECTED RESULT
KWin doesn't crash.
ADDITIONAL INFORMATION
KWin was launched as a standalone WM without any DE components.
[1] https://gitlab.freedesktop.org/vyivel/randfall
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