| Summary: |
kwin_wayland segfaults in KWin::LockScreenFilter::pointerEvent() when laptop screen is closed, turned off, and then reopened |
| Product: |
[Plasma] kwin
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Reporter: |
Luca Beltrame <lbeltrame> |
| Component: |
wayland-generic | Assignee: |
KWin default assignee <kwin-bugs-null> |
| Status: |
RESOLVED
FIXED
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| Severity: |
crash
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CC: |
nate, xaver.hugl
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| Priority: |
NOR
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|
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| Version: |
git master | |
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| Target Milestone: |
--- | |
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| Platform: |
openSUSE | |
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| OS: |
Linux | |
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Latest Commit:
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https://invent.kde.org/plasma/kwin/-/commit/cd0430303b7009d034228668592635be0521b08e
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Version Fixed In:
|
5.25
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Sentry Crash Report:
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| Attachments: |
Backtrace from coredumpctl
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Created attachment 148356 [details] Backtrace from coredumpctl SUMMARY When I close my laptop screen (regardless if the machine suspends or not), if the laptop screen is turned off, kwin_wayland will crash once the screen is opened again and the screen is turned on again. This also happens if the screen is simply turned off for energy saving. A look at the backtrace (attached) suggests that it attempts to access a member of an object that's however null. STEPS TO REPRODUCE 1. Close laptop screen 2. Wait until laptop suspends 3. Open laptop screen OBSERVED RESULT kwin_wayland crashes. EXPECTED RESULT kwin_wayland should not crash. SOFTWARE/OS VERSIONS KDE Plasma Version: latest git master KDE Frameworks Version: latest git master Qt Version: Qt 5.15.3 + KDE patches ADDITIONAL INFORMATION Test machine: Lenovo Thinkpad T470, with latest stable Mesa and kernel 5.17.3. Excerpt from gdb debug session: Core was generated by `/usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8 --xwayl'. Program terminated with signal SIGSEGV, Segmentation fault. #0 KWin::LockScreenFilter::pointerEvent (this=<optimized out>, event=0x7ffe50e6bd80, nativeButton=0) at /usr/src/debug/kwin5-5.24.80git.20220423T142940~8455427dbc-ku.78.1.x86_64/src/input.cpp:354 354 if (window->isClient() && window->isLockScreen()) { [Current thread is 1 (Thread 0x7f03e7d45980 (LWP 25016))] (gdb) print window $1 = (KWin::Window *) 0x0 (gdb)