https://bugs.kde.org/show_bug.cgi?id=449773
Bug ID: 449773
Summary: Conditional jump or move depends on uninitialised
value in KWin::DrmPipeline::checkTestBuffer
Product: kwin
Version: 5.24.0
Platform: openSUSE RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: jirisl...@gmail.com
CC: kwin-bugs-n...@kde.org, n...@kde.org,
xaver.h...@gmail.com
Depends on: 445894
Blocks: 446101
Target Milestone: ---
+++ This bug was initially created as a clone of Bug #445894 +++
> Conditional jump or move depends on uninitialised value(s)
> at 0xCD2EBCF:
> KWin::DrmPipeline::checkTestBuffer()::{lambda(QSharedPointer<KWin::DrmBuffer>
> const&)#1}::operator()(QSharedPointer<KWin::DrmBuffer> const&) const
> (drm_pipeline.cpp:306)
> by 0xCD2EDA3: KWin::DrmPipeline::checkTestBuffer() (drm_pipeline.cpp:318)
> by 0xCD2F41E:
> KWin::DrmPipeline::commitPipelinesAtomic(QVector<KWin::DrmPipeline*> const&,
> KWin::DrmPipeline::CommitMode, QVector<KWin::DrmObject*> const&)
> (drm_pipeline.cpp:131)
> by 0xCD26BA8: KWin::DrmGpu::testPipelines() (drm_gpu.cpp:427)
> by 0xCD29E27:
> KWin::DrmGpu::checkCrtcAssignment(QVector<KWin::DrmConnector*>,
> QVector<KWin::DrmCrtc*>) (drm_gpu.cpp:365)
> by 0xCD29E27:
> KWin::DrmGpu::checkCrtcAssignment(QVector<KWin::DrmConnector*>,
> QVector<KWin::DrmCrtc*>) (drm_gpu.cpp:365)
> by 0xCD3B298: UnknownInlinedFun (drm_gpu.cpp:398)
> by 0xCD3B298: UnknownInlinedFun (drm_gpu.cpp:396)
> by 0xCD3B298:
> KWin::DrmGpu::testPendingConfiguration(KWin::DrmGpu::TestMode) [clone
> .constprop.0] (drm_gpu.cpp:403)
> by 0xCD14B43: KWin::DrmBackend::updateOutputs() (drm_gpu.cpp:309)
> by 0xCD16F0C: KWin::DrmBackend::handleUdevEvent() (drm_backend.cpp:237)
> by 0x6FC54F2: UnknownInlinedFun (qobjectdefs_impl.h:398)
> by 0x6FC54F2: void doActivate<false>(QObject*, int, void**)
> (qobject.cpp:3886)
> by 0x6FC88CE: QSocketNotifier::activated(QSocketDescriptor,
> QSocketNotifier::Type, QSocketNotifier::QPrivateSignal)
> (moc_qsocketnotifier.cpp:178)
> by 0x6FC90CA: QSocketNotifier::event(QEvent*) (qsocketnotifier.cpp:302)
> Uninitialised value was created by a stack allocation
> at 0xCD329F0: QtPrivate::QSlotObject<bool
> (KWin::EglGbmBackend::*)(KWin::DrmAbstractOutput*),
> QtPrivate::List<KWin::DrmAbstractOutput*>, void>::impl(int,
> QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (qobjectdefs_impl.h:411)
(In reply to Vlad Zahorodnii from bug 445894 comment #23)
> > So it's the pointer returned by backend->drmFormat(m_output);
>
> drmFormat() returns an integer. can you add a default member initializer for
> GbmFormat::drmFormat, i.e.
>
> struct GbmFormat
> {
> uint32_t drmFormat = 0;
Sure, this makes it go away.
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20211117
KDE Plasma Version: 5.23.2
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.2
Kernel Version: 5.15.2-1.g26a203b-default (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i7-6600U CPU @ 2.60GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 520
Referenced Bugs:
https://bugs.kde.org/show_bug.cgi?id=445894
[Bug 445894] Crash in KWin::DrmOutput::updateCursor -> malloc(): unsorted
double linked list corrupted
https://bugs.kde.org/show_bug.cgi?id=446101
[Bug 446101] Crash in KWin::DrmPipeline::setCursor
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