https://bugs.kde.org/show_bug.cgi?id=435042
Bug ID: 435042
Summary: kwin_wayland segfaults while recording via pipewire if
mouse hovers over (close) button of window
Product: kwin
Version: 5.21.3
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: he...@freedesk.net
Target Milestone: ---
SUMMARY
Streaming my screen under wayland using
https://github.com/H-M-H/Weylus/tree/0d85438a06965ff62d18c4a62fad1a13c03d112a
kwin_wayland crashes once the mouse hovers over the close button of any window,
so far I have not tried other ways to produce a crash but hovering the mouse
like that reliably crashes kwin.
STEPS TO REPRODUCE
Run above program, open http://127.0.0.1:1701 with firefox, choose to share the
desktop, set frame interval to 0 and finally hover the mouse over any window
button.
OBSERVED RESULT
kwin_wayland crashes with the following backtrace:
Signal: 11 (SEGV)
Timestamp: Sun 2021-03-28 01:24:31 CET (26s ago)
Command Line: kwin_wayland --wayland_fd 4 --xwayland
/usr/lib/startplasma-waylandsession
Executable: /usr/bin/kwin_wayland
Thread 15 (Thread 0x7f12d6e4b640 (LWP 2569)):
#0 0x00007f13b64df39e in epoll_wait () at /usr/lib/libc.so.6
#1 0x00007f12ebf0fed1 in () at /usr/lib/spa-0.2/support/libspa-support.so
#2 0x00007f12ebf06154 in () at /usr/lib/spa-0.2/support/libspa-support.so
#3 0x00007f13b67c2070 in () at /usr/lib/libpipewire-0.3.so.0
#4 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 14 (Thread 0x7f12f14e7640 (LWP 1311)):
#0 0x00007f13b64d437f in poll () at /usr/lib/libc.so.6
#1 0x00007f13b584f9d8 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f13b57f96f1 in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3 0x00007f13b7e83691 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7e293ac in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#5 0x00007f13b7c41d12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007f13b4bbe5a9 in () at /usr/lib/libQt5Qml.so.5
#7 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#8 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 13 (Thread 0x7f12f24ff640 (LWP 880)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13b7c49048 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/libQt5Core.so.5
#3 0x00007f13b7c464f4 in () at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#5 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 12 (Thread 0x7f137e7fe640 (LWP 879)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c260 in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13b569cfee in () at /usr/lib/libQt5Script.so.5
#3 0x00007f13b569d019 in () at /usr/lib/libQt5Script.so.5
#4 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 11 (Thread 0x7f137ffff640 (LWP 876)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13b7c49048 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/libQt5Core.so.5
#3 0x00007f13b7c464f4 in () at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#5 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 10 (Thread 0x7f139771f640 (LWP 871)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c260 in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13ac8fccec in () at /usr/lib/dri/iris_dri.so
#3 0x00007f13ac8fb4c8 in () at /usr/lib/dri/iris_dri.so
#4 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 9 (Thread 0x7f1397f20640 (LWP 870)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c260 in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13ac8fccec in () at /usr/lib/dri/iris_dri.so
#3 0x00007f13ac8fb4c8 in () at /usr/lib/dri/iris_dri.so
#4 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 8 (Thread 0x7f1396f1e640 (LWP 872)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c260 in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13ac8fccec in () at /usr/lib/dri/iris_dri.so
#3 0x00007f13ac8fb4c8 in () at /usr/lib/dri/iris_dri.so
#4 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 7 (Thread 0x7f13965dd640 (LWP 873)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13b7c49048 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/libQt5Core.so.5
#3 0x00007f13b7c464f4 in () at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#5 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 6 (Thread 0x7f1395806640 (LWP 874)):
#0 0x00007f13b64d437f in poll () at /usr/lib/libc.so.6
#1 0x00007f13b584f9d8 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f13b57f96f1 in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3 0x00007f13b7e83691 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7e293ac in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#5 0x00007f13b7c41d12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007f13b4bbe5a9 in () at /usr/lib/libQt5Qml.so.5
#7 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#8 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 5 (Thread 0x7f1398721640 (LWP 869)):
#0 0x00007f13b68529ba in __futex_abstimed_wait_common64 () at
/usr/lib/libpthread.so.0
#1 0x00007f13b684c260 in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#2 0x00007f13ac8fccec in () at /usr/lib/dri/iris_dri.so
#3 0x00007f13ac8fb4c8 in () at /usr/lib/dri/iris_dri.so
#4 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 4 (Thread 0x7f13b066b640 (LWP 866)):
#0 0x00007f13b64d437f in poll () at /usr/lib/libc.so.6
#1 0x00007f13b584f9d8 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f13b57f96f1 in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3 0x00007f13b7e83691 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7e293ac in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#5 0x00007f13b7c41d12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007f13b87af098 in () at /usr/lib/libQt5DBus.so.5
#7 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#8 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 3 (Thread 0x7f13afe1e640 (LWP 867)):
#0 0x00007f13b64d437f in poll () at /usr/lib/libc.so.6
#1 0x00007f13b584f9d8 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f13b57f96f1 in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3 0x00007f13b7e83691 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7e293ac in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#5 0x00007f13b7c41d12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#7 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 2 (Thread 0x7f13af56e640 (LWP 868)):
#0 0x00007f13b64d437f in poll () at /usr/lib/libc.so.6
#1 0x00007f13b584f9d8 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f13b57f96f1 in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3 0x00007f13b7e83691 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#4 0x00007f13b7e293ac in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#5 0x00007f13b7c41d12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007f13b7c42eff in () at /usr/lib/libQt5Core.so.5
#7 0x00007f13b6846299 in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007f13b64df053 in clone () at /usr/lib/libc.so.6
Thread 1 (Thread 0x7f13b14dfec0 (LWP 865)):
#0 0x00007f13b76c8b60 in () at /usr/lib/libkwinglutils.so.13
#1 0x00007f13b76c9b3d in KWin::GLVertexBuffer::setData(int, int, float const*,
float const*) () at /usr/lib/libkwinglutils.so.13
#2 0x00007f13b76c4988 in KWin::GLTexture::render(QRegion const&, QRect const&,
bool) () at /usr/lib/libkwinglutils.so.13
#3 0x00005627d2e41726 in KWin::PipeWireStream::recordFrame(KWin::GLTexture*,
QRegion const&) ()
#4 0x00005627d2e419a5 in ()
#5 0x00007f13b7e61d86 in () at /usr/lib/libQt5Core.so.5
#6 0x00007f13b78e8fb8 in KWin::Cursors::positionChanged(KWin::Cursor*, QPoint
const&) () at /usr/lib/libkwin.so.5
#7 0x00007f13b7e61d86 in () at /usr/lib/libQt5Core.so.5
#8 0x00007f13b78e8df3 in KWin::Cursor::posChanged(QPoint const&) () at
/usr/lib/libkwin.so.5
#9 0x00007f13b79bee51 in () at /usr/lib/libkwin.so.5
#10 0x00007f13b7e61d86 in () at /usr/lib/libQt5Core.so.5
#11 0x00007f13b78e96e3 in KWin::InputRedirection::globalPointerChanged(QPointF
const&) () at /usr/lib/libkwin.so.5
#12 0x00007f13b79c1114 in KWin::PointerInputRedirection::updatePosition(QPointF
const&) () at /usr/lib/libkwin.so.5
#13 0x00007f13b79c2633 in KWin::PointerInputRedirection::processMotion(QPointF
const&, QSizeF const&, QSizeF const&, unsigned int, unsigned long long,
KWin::LibInput::Device*) () at /usr/lib/libkwin.so.5
#14 0x00007f13b7979785 in () at /usr/lib/libkwin.so.5
#15 0x00007f13b7e61d86 in () at /usr/lib/libQt5Core.so.5
#16 0x00007f13b78ea5da in KWin::LibInput::Connection::pointerMotion(QSizeF
const&, QSizeF const&, unsigned int, unsigned long long,
KWin::LibInput::Device*) () at /usr/lib/libkwin.so.5
#17 0x00007f13b799fe7a in KWin::LibInput::Connection::processEvents() () at
/usr/lib/libkwin.so.5
#18 0x00007f13b7e57532 in QObject::event(QEvent*) () at
/usr/lib/libQt5Core.so.5
#19 0x00007f13b6e5c752 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/libQt5Widgets.so.5
#20 0x00007f13b7e2aa2a in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/libQt5Core.so.5
#21 0x00007f13b7e2d523 in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#22 0x00007f13b7e80aec in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#23 0x00005627d2e6c7ee in ()
#24 0x00007f13b7e293ac in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#25 0x00007f13b7e31844 in QCoreApplication::exec() () at
/usr/lib/libQt5Core.so.5
#26 0x00005627d2e16e89 in ()
#27 0x00007f13b6407b25 in __libc_start_main () at /usr/lib/libc.so.6
#28 0x00005627d2e1792e in _start ()
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