Bug 509672 - PackageKitUpdater::finished causes SEGV in QCoreApplicationPrivate::lockThreadPostEventList due to invalid pointer dereference during signal–slot cleanup from QObject::deleteLater()
Summary: PackageKitUpdater::finished causes SEGV in QCoreApplicationPrivate::lockThrea...
Status: RESOLVED DUPLICATE of bug 506919
Alias: None
Product: Discover
Classification: Applications
Component: PackageKit (other bugs)
Version First Reported In: 6.4.4
Platform: Fedora RPMs Linux
: NOR crash
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords: drkonqi
Depends on:
Blocks:
 
Reported: 2025-09-19 10:25 UTC by Roke Julian Lockhart Beedell
Modified: 2025-09-19 19:44 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report: https://crash-reports.kde.org/organizations/kde/issues/256315/events/78c6375c781349928ff59ccb95b1beb0/


Attachments
New crash information added by DrKonqi (72.48 KB, text/plain)
2025-09-19 10:25 UTC, Roke Julian Lockhart Beedell
Details

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Description Roke Julian Lockhart Beedell 2025-09-19 10:25:04 UTC
Application: plasma-discover (6.4.4)

ApplicationNotResponding [ANR]: false
Qt Version: 6.9.2
Frameworks Version: 6.17.0
Operating System: Linux 6.16.7-200.fc42.x86_64 x86_64
Windowing System: Wayland
Distribution: "Fedora Linux 42 (KDE Plasma Desktop Edition)"
DrKonqi: 6.4.4 [CoredumpBackend]

-- Information about the crash:
I'd merely left the OS idle for PT3M. (When I moved my mouse, some notifications appeared, which were quickly replaced by one about Discover crashing. I doubt that they were relevant.) This is the upstream counterpart to https://bugzilla.redhat.com/show_bug.cgi?id=2374277#c14.

The crash can be reproduced sometimes.

-- Backtrace (Reduced):
#4  std::__atomic_base<QThreadData*>::load (this=0x58, __m=std::memory_order_acquire) at /usr/include/c++/15/bits/atomic_base.h:828
#5  std::atomic<QThreadData*>::load (this=0x58, __m=std::memory_order_acquire) at /usr/include/c++/15/atomic:587
#6  QAtomicOps<QThreadData*>::loadAcquire<QThreadData*> (_q_value=...) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/thread/qatomic_cxx11.h:214
#7  QBasicAtomicPointer<QThreadData>::loadAcquire (this=0x58) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/thread/qbasicatomic.h:177
#8  QCoreApplicationPrivate::lockThreadPostEventList (object=object@entry=0x55ae1602d870) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1580
#9  0x00007f86afb531f3 in QObject::deleteLater (this=0x55ae1602d870) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:2468
#10 0x00007f86afb65bba in QtPrivate::QSlotObjectBase::call (this=0x55ae162196b0, r=0x55ae1602d870, a=0x7ffd006e17a0) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#11 doActivate<false> (sender=0x55ae155d9800, signal_index=5, argv=argv@entry=0x7ffd006e17a0) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4157
[...]
#14 AbstractBackendUpdater::progressingChanged (this=this@entry=0x55ae155d9800, _t1=<optimized out>, _t1@entry=false) at /usr/src/debug/plasma-discover-6.4.4-1.fc42.x86_64/redhat-linux-build/libdiscover/DiscoverCommon_autogen/include/moc_AbstractBackendUpdater.cpp:305
#15 0x00007f86285aded5 in PackageKitUpdater::setProgressing (this=0x55ae155d9800, progressing=false) at /usr/src/debug/plasma-discover-6.4.4-1.fc42.x86_64/libdiscover/backends/PackageKitBackend/PackageKitUpdater.cpp:783
#16 PackageKitUpdater::setProgressing (this=0x55ae155d9800, progressing=false) at /usr/src/debug/plasma-discover-6.4.4-1.fc42.x86_64/libdiscover/backends/PackageKitBackend/PackageKitUpdater.cpp:779
#17 PackageKitUpdater::finished (this=0x55ae155d9800, exit=PackageKit::Transaction::ExitSuccess) at /usr/src/debug/plasma-discover-6.4.4-1.fc42.x86_64/libdiscover/backends/PackageKitBackend/PackageKitUpdater.cpp:615
#18 0x00007f86afb65bba in QtPrivate::QSlotObjectBase::call (this=0x55ae164d63b0, r=0x55ae155d9800, a=0x7ffd006e1b40) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#19 doActivate<false> (sender=0x55ae164a9d90, signal_index=23, argv=argv@entry=0x7ffd006e1b40) at /usr/src/debug/qt6-qtbase-6.9.2-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4157
[...]
#21 0x00007f86284fa5d8 in PackageKit::Transaction::finished (this=this@entry=0x55ae164a9d90, _t1=<optimized out>, _t2=<optimized out>) at /usr/src/debug/PackageKit-Qt-1.1.1-8.fc42.x86_64/pkqt6/redhat-linux-build/src/packagekitqt6_autogen/include/moc_transaction.cpp:1750
#22 0x00007f8628501df1 in PackageKit::TransactionPrivate::finished (this=0x55ae1623e4e0, exitCode=<optimized out>, runtime=<optimized out>) at /usr/src/debug/PackageKit-Qt-1.1.1-8.fc42.x86_64/src/transactionprivate.cpp:243


Reported using DrKonqi
Comment 1 Roke Julian Lockhart Beedell 2025-09-19 10:25:05 UTC
Created attachment 185073 [details]
New crash information added by DrKonqi

DrKonqi auto-attaching complete backtrace.
Comment 2 TraceyC 2025-09-19 19:44:35 UTC
Thank you for the bug report. Based on the backtrace this looks like a duplicate of bug 506919. Please follow that report if you would like updates on the progress of this issue.

*** This bug has been marked as a duplicate of bug 506919 ***