Application: kcminit () Qt Version: 5.10.0 Frameworks Version: 5.46.0 Operating System: Linux 4.4.126-48-default x86_64 Distribution: "openSUSE Leap 42.3" -- Information about the crash: - What I was doing when the application crashed: Start KDE desktop. I've tryed from different users, and kcminit crashes every time. - Unusual behavior I noticed: I don't know if it is related or not, but I've also strange behaviours on plasma widgets: wrong sizes and placements. If it's necessary I can attach some screenshots. The binaries comes from here: http://download.opensuse.org/repositories/KDE:/Frameworks5/openSUSE_Leap_42.3/ The crash can be reproduced every time. -- Backtrace: Application: KCMInit (kcminit), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". [Current thread is 1 (Thread 0x7fa2e6311900 (LWP 15515))] Thread 2 (Thread 0x7fa2d02aa700 (LWP 15529)): #0 0x00007fa2e5c8f30d in poll () from /lib64/libc.so.6 #1 0x00007fa2e0847314 in ?? () from /usr/lib64/libglib-2.0.so.0 #2 0x00007fa2e084742c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0 #3 0x00007fa2e441efbb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5 #4 0x00007fa2e43caa4b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5 #5 0x00007fa2e420814a in QThread::exec() () from /usr/lib64/libQt5Core.so.5 #6 0x00007fa2e52297b5 in ?? () from /usr/lib64/libQt5DBus.so.5 #7 0x00007fa2e420ce0f in ?? () from /usr/lib64/libQt5Core.so.5 #8 0x00007fa2e2cbb724 in start_thread () from /lib64/libpthread.so.0 #9 0x00007fa2e5c97e8d in clone () from /lib64/libc.so.6 Thread 1 (Thread 0x7fa2e6311900 (LWP 15515)): [KCrash Handler] #6 QMapData<KEntryKey, KEntry>::findNode (this=0x4545454545454545, akey=...) at /usr/include/qt5/QtCore/qmap.h:284 #7 0x00007fa2e335046d in QMap<KEntryKey, KEntry>::constFind (akey=..., this=0x21a70b0) at /usr/include/qt5/QtCore/qmap.h:869 #8 QMap<KEntryKey, KEntry>::find (akey=..., this=0x21a70b0) at /usr/include/qt5/QtCore/qmap.h:876 #9 KEntryMap::findEntry (this=this@entry=0x21a70b0, group=..., key=..., flags=...) at /usr/src/debug/kconfig-5.46.0/src/core/kconfigdata.cpp:74 #10 0x00007fa2e3350504 in KEntryMap::getEntry (this=this@entry=0x21a70b0, group=..., key=..., defaultValue=..., flags=..., flags@entry=..., expand=expand@entry=0x7ffd5567b78f) at /usr/src/debug/kconfig-5.46.0/src/core/kconfigdata.cpp:224 #11 0x00007fa2e3345b48 in KConfigPrivate::lookupData (this=0x21a7090, group=..., key=key@entry=0x7fa2cd7e3ea7 "cursorTheme", flags=..., flags@entry=..., expand=expand@entry=0x7ffd5567b78f) at /usr/src/debug/kconfig-5.46.0/src/core/kconfig.cpp:1005 #12 0x00007fa2e335472b in KConfigGroup::readEntry (this=this@entry=0x7ffd5567b860, key=key@entry=0x7fa2cd7e3ea7 "cursorTheme", aDefault=...) at /usr/src/debug/kconfig-5.46.0/src/core/kconfiggroup.cpp:687 #13 0x00007fa2cd7d25cb in X11Backend::kcmInit (this=0x2190b60) at /usr/src/debug/plasma-desktop-5.12.90/kcms/input/backends/x11/x11_backend.cpp:127 #14 0x00007fa2cd7c9f84 in kcminit_mouse () at /usr/src/debug/plasma-desktop-5.12.90/kcms/input/kcm/configcontainer.cpp:31 #15 0x00007fa2e5f578c7 in KCMInit::runModule (this=this@entry=0x7ffd5567bc30, libName=..., service=...) at /usr/src/debug/plasma-workspace-5.12.90/startkde/kcminit/main.cpp:87 #16 0x00007fa2e5f581b1 in KCMInit::runModules (this=this@entry=0x7ffd5567bc30, phase=phase@entry=-1) at /usr/src/debug/plasma-workspace-5.12.90/startkde/kcminit/main.cpp:129 #17 0x00007fa2e5f58898 in KCMInit::KCMInit (this=0x7ffd5567bc30, args=...) at /usr/src/debug/plasma-workspace-5.12.90/startkde/kcminit/main.cpp:189 #18 0x00007fa2e5f59395 in kdemain (argc=1, argv=<optimized out>) at /usr/src/debug/plasma-workspace-5.12.90/startkde/kcminit/main.cpp:241 #19 0x00007fa2e5bcb725 in __libc_start_main () from /lib64/libc.so.6 #20 0x00000000004006b9 in _start () at ../sysdeps/x86_64/start.S:118 Reported using DrKonqi
Crashes in Mouse KCM init
*** Bug 395121 has been marked as a duplicate of this bug. ***
*** Bug 395482 has been marked as a duplicate of this bug. ***
*** Bug 395539 has been marked as a duplicate of this bug. ***
All duplicates from openSUSE.
(In reply to Christoph Feck from comment #5) > All duplicates from openSUSE. Likely a red herring because of different compiler or environment options for additional hardening. This looks like wrong use of KConfig to me, it creates a dangling pointer: https://cgit.kde.org/plasma-desktop.git/tree/kcms/mouse/backends/x11/x11_backend.cpp#n126
Yep. Never crashes here but a minimal test of the same code does produce a valgrind warning. Writing the correct version which keeps the lifespan of the KConfig object does nto produce the warning. Will fix this.
I reported my duplicate 395539 less than 24 hours ago. Great to see that you're on top of it. Thanks a lot, keep it up!
Git commit ead2c3e859dcb8531df99e87c0fe6eff64650952 by David Edmundson. Committed on 19/06/2018 at 08:02. Pushed by davidedmundson into branch 'Plasma/5.13'. Ref KConfig whilst we're using it Summary: In current code we would have a KConfigGroup with a dangling KConfig deleted after the RHS for the group fetch has finished. Test Plan: Wrote minimal test case of code It produced a valgrind warning (weirdly didn't crash though) Modified to correct version No longer any warnings Reviewers: #plasma Subscribers: plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D13599 M +3 -1 kcms/mouse/backends/x11/x11_backend.cpp https://commits.kde.org/plasma-desktop/ead2c3e859dcb8531df99e87c0fe6eff64650952
*** Bug 395613 has been marked as a duplicate of this bug. ***
Created attachment 113521 [details] New crash information added by DrKonqi kdeinit5 () using Qt 5.11.0 - What I was doing when the application crashed: Logging in via sddm. Happens with all users on this system, even with new created ones. -- Backtrace (Reduced): #6 0x00007f21e87e11ea in QMapData<KEntryKey, KEntry>::findNode (this=0x4545454545454545, akey=...) at /usr/include/qt5/QtCore/qmap.h:284 #7 0x00007f21e87e639b in QMap<KEntryKey, KEntry>::constFind (this=0x561798ad0500, akey=...) at /usr/include/qt5/QtCore/qmap.h:874 #8 QMap<KEntryKey, KEntry>::find (akey=..., this=0x561798ad0500) at /usr/include/qt5/QtCore/qmap.h:876 #9 KEntryMap::findEntry (this=this@entry=0x561798ad0500, group=..., key=..., flags=...) at /usr/src/debug/kconfig-5.46.0-1.2.x86_64/src/core/kconfigdata.cpp:74 #10 0x00007f21e87e64bb in KEntryMap::getEntry (this=this@entry=0x561798ad0500, group=..., key=..., defaultValue=..., flags=..., flags@entry=..., expand=0x7ffd1aba4b27) at /usr/src/debug/kconfig-5.46.0-1.2.x86_64/src/core/kconfigdata.cpp:224
*** Bug 395779 has been marked as a duplicate of this bug. ***
*** Bug 395869 has been marked as a duplicate of this bug. ***
We also get the same crash for Akregator on Tumbleweed, see bug 384134. Could anyone understanding the Plasma fix propose a fix for Akregator?
*** Bug 395913 has been marked as a duplicate of this bug. ***
Okular is also affected, see bug 395765.
(In reply to Christoph Feck from comment #16) > Okular is also affected, see bug 395765. The backtraces are basically identical, seems to be caused by KMainWindow. I don't see anything wrong with a first glance though.
*** Bug 395691 has been marked as a duplicate of this bug. ***