https://bugs.kde.org/show_bug.cgi?id=445984
Bug ID: 445984
Summary: kwin_wayland crashes when snapping wayland windows.
Product: kwin
Version: 5.23.3
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: egl
Assignee: kwin-bugs-n...@kde.org
Reporter: kkartalt...@gmail.com
Target Milestone: ---
SUMMARY
Snapping windows can sometimes result in a crash in kwin_wayland nested.
STEPS TO REPRODUCE
1. Start an X11 environment
2. Start kwin_wayland as a nested client.
3. Run the sample application
4. Snap the application to the right side.
5. Observe the crash.
On a fresh boot this occurs with 100% reproduction rate. I was able to somehow
get into a state where it didnt occur eventually, but upon rebooting it was
100% reproducible again.
OBSERVED RESULT
kwin crashes
EXPECTED RESULT
kwin doesnt crash
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Archlinux, kernel `5.15.2-arch1-1`
(available in About System)
kwin_wayland Version: `5.23.3`
KDE Plasma Version: Im not sure what this refers to, I just have kwin and the
bare minimum to run it nested.
KDE Frameworks Version: Im not sure what this refers to.
Qt Version: `5.15.2+kde+r256-1`
nvidia drivers: 495.44
nvidia's egl-wayland: 1.1.9 (commit daab854)
ADDITIONAL INFORMATION
Sample program:
https://github.com/kkartaltepe/wayland-egl-simple
Interesting output right before the crash:
```
No provider of eglDestroyImageKHR found. Requires one of:
EGL_KHR_image
EGL_KHR_image_base
EGL 15
```
(However EGL 1.5 is supported under X11 and Wayland along with both extensions
on X11 and wayland, at least as reported by `eglinfo`)
Stack trace for the crashed thread:
```
Thread 1 "kwin_wayland" received signal SIGABRT, Aborted.
0x00007f97c970ed22 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0 0x00007f97c970ed22 in raise () at /usr/lib/libc.so.6
#1 0x00007f97c96f8862 in abort () at /usr/lib/libc.so.6
#2 0x00007f97c9c6ecee in () at /usr/lib/libepoxy.so.0
#3 0x00007f97c9c722ba in () at /usr/lib/libepoxy.so.0
#4 0x00007f97cbc28def in ()
at
/usr/lib/qt/plugins/org.kde.kwin.waylandbackends/KWinWaylandX11Backend.so
#5 0x00007f97cbc290d3 in ()
at
/usr/lib/qt/plugins/org.kde.kwin.waylandbackends/KWinWaylandX11Backend.so
#6 0x00007f97c90a080f in () at /usr/lib/libwayland-server.so.0
#7 0x00007f97c90a0f51 in wl_resource_destroy () at
/usr/lib/libwayland-server.so.0
#8 0x00007f97c7289d4a in () at /usr/lib/libffi.so.8
#9 0x00007f97c7289267 in () at /usr/lib/libffi.so.8
#10 0x00007f97c90a6173 in () at /usr/lib/libwayland-server.so.0
#11 0x00007f97c90a155c in () at /usr/lib/libwayland-server.so.0
#12 0x00007f97c90a404a in wl_event_loop_dispatch () at
/usr/lib/libwayland-server.so.0
#13 0x00007f97ca9e11a7 in KWaylandServer::Display::dispatchEvents() ()
at /usr/lib/libKWaylandServer.so.5
#14 0x00007f97c9fd57ab in () at /usr/lib/libQt5Core.so.5
#15 0x00007f97c9fd8c70 in QSocketNotifier::activated(QSocketDescriptor,
QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) () at
/usr/lib/libQt5Core.so.5
#16 0x00007f97c9fd947d in QSocketNotifier::event(QEvent*) () at
/usr/lib/libQt5Core.so.5
#17 0x00007f97cac7bd62 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
()
at /usr/lib/libQt5Widgets.so.5
#18 0x00007f97c9f9e3fa in QCoreApplication::notifyInternal2(QObject*, QEvent*)
()
at /usr/lib/libQt5Core.so.5
#19 0x00007f97c9ff4364 in
QEventDispatcherUNIXPrivate::activateSocketNotifiers() ()
at /usr/lib/libQt5Core.so.5
#20 0x00007f97c9ff47e5 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() at /usr/lib/libQt5Core.so.5
#21 0x000055829affccee in ()
#22 0x00007f97c9f9cd6c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#23 0x00007f97c9fa52d4 in QCoreApplication::exec() () at
/usr/lib/libQt5Core.so.5
#24 0x000055829af998cb in ()
#25 0x00007f97c96f9b25 in __libc_start_main () at /usr/lib/libc.so.6
#26 0x000055829af9a2ce in ()
```
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