Application that crashed: ksysguard
Version of the application: 4.3.00 (KDE 4.3.0)
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-4.slh.2-sidux-686 i686
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
ksysguard crashes just from looking at the properties on the Network graph, much less changing them. "OK" or "Apply" creates segfault, "Cancel" does not. The other graphs don't produce segfault from this action.
Strace looks like this at crash, with 1023 repeaded  (close)  lines:


read(8, 0x9283010, 4096)                = -1 EAGAIN (Resource temporarily unavailable)                                                       
clock_gettime(CLOCK_MONOTONIC, {819, 882049978}) = 0                                                                                         
--- SIGSEGV (Segmentation fault) @ 0 (0) ---                                                                                                 
rt_sigaction(SIGALRM, {SIG_DFL, [ALRM], SA_RESTART}, {SIG_DFL, [], 0}, 8) = 0                                                                
alarm(3)                                = 0                                                                                                  
getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0                                                                                 
close(3)                                = 0                                                                                                  
close(4)                                = 0       

<long snip>
                                    close(1023)                             = -1 EBADF (Bad file descriptor)                                                                     
write(2, "KCrash: Application 'ksysguard' "..., 44KCrash: Application 'ksysguard' crashing...                                                
) = 44     

<snip>


 -- Backtrace:
Application: System Monitor (ksysguard), signal: Segmentation fault
[KCrash Handler]
#6  QColor (this=0x1000000) at /usr/include/qt4/QtGui/qcolor.h:259
#7  SensorModelEntry::color (this=0x1000000) at ../../../ksysguard/gui/SensorDisplayLib/SensorModel.cc:95
#8  0xb7fb3db8 in FancyPlotter::applySettings (this=0x86230a0) at ../../../ksysguard/gui/SensorDisplayLib/FancyPlotter.cc:260
#9  0xb7fb4dc3 in FancyPlotter::qt_metacall (this=0x86230a0, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbffde408) at ./FancyPlotter.moc:75
#10 0xb73dead3 in QMetaObject::activate (sender=0x8ab2af8, from_signal_index=45, to_signal_index=45, argv=0x0) at kernel/qobject.cpp:3112
#11 0xb73df722 in QMetaObject::activate (sender=0x8ab2af8, m=0xb7ae0524, local_signal_index=9, argv=0x0) at kernel/qobject.cpp:3186
#12 0xb78a39f7 in KDialog::okClicked (this=0x8ab2af8) at ./kdialog.moc:252
#13 0xb78a61e8 in KDialog::slotButtonClicked (this=0x8ab2af8, button=4) at ../../kdeui/dialogs/kdialog.cpp:854
#14 0xb78a8332 in KDialog::qt_metacall (this=0x8ab2af8, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0xbffde5fc) at ./kdialog.moc:184
#15 0xb796d8ea in KPageDialog::qt_metacall (this=0x8ab2af8, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbffde5fc) at ./kpagedialog.moc:64
#16 0xb7fb6baa in FancyPlotterSettings::qt_metacall (this=0x8ab2af8, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbffde5fc) at ./FancyPlotterSettings.moc:68
#17 0xb73dead3 in QMetaObject::activate (sender=0x8ab4ce0, from_signal_index=4, to_signal_index=4, argv=0xbffde5fc) at kernel/qobject.cpp:3112
#18 0xb73df722 in QMetaObject::activate (sender=0x8ab4ce0, m=0xb74b9cf8, local_signal_index=0, argv=0xbffde5fc) at kernel/qobject.cpp:3186
#19 0xb73e2343 in QSignalMapper::mapped (this=0x8ab4ce0, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#20 0xb73e2bcd in QSignalMapper::map (this=0x8ab4ce0, sender=0x86d5c40) at kernel/qsignalmapper.cpp:266
#21 0xb73e2dbe in QSignalMapper::map (this=0x8ab4ce0) at kernel/qsignalmapper.cpp:257
#22 0xb73e368b in QSignalMapper::qt_metacall (this=0x8ab4ce0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbffde77c) at .moc/release-shared/moc_qsignalmapper.cpp:81
#23 0xb73dead3 in QMetaObject::activate (sender=0x86d5c40, from_signal_index=29, to_signal_index=30, argv=0xbffde77c) at kernel/qobject.cpp:3112
#24 0xb73def00 in QMetaObject::activate (sender=0x86d5c40, m=0xb722e924, from_local_signal_index=2, to_local_signal_index=3, argv=0xbffde77c) at kernel/qobject.cpp:3206
#25 0xb7047951 in QAbstractButton::clicked (this=0x86d5c40, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#26 0xb6d73329 in QAbstractButtonPrivate::emitClicked (this=0x8ab94b0) at widgets/qabstractbutton.cpp:543
#27 0xb6d74f14 in QAbstractButtonPrivate::click (this=0x8ab94b0) at widgets/qabstractbutton.cpp:536
#28 0xb6d751a6 in QAbstractButton::mouseReleaseEvent (this=0x86d5c40, e=0xbffdee1c) at widgets/qabstractbutton.cpp:1115
#29 0xb6a1b73b in QWidget::event (this=0x86d5c40, event=0xbffdee1c) at kernel/qwidget.cpp:7549
#30 0xb6d731ce in QAbstractButton::event (this=0x86d5c40, e=0xbffdee1c) at widgets/qabstractbutton.cpp:1077
#31 0xb6e1ca00 in QPushButton::event (this=0x86d5c40, e=0xbffdee1c) at widgets/qpushbutton.cpp:662
#32 0xb69c57d4 in QApplicationPrivate::notify_helper (this=0x84a5e38, receiver=0x86d5c40, e=0xbffdee1c) at kernel/qapplication.cpp:4056
#33 0xb69ce2a1 in QApplication::notify (this=0x84a5d80, receiver=0x86d5c40, e=0xbffdee1c) at kernel/qapplication.cpp:3758
#34 0xb793d00d in KApplication::notify (this=0x84a5d80, receiver=0x86d5c40, event=0xbffdee1c) at ../../kdeui/kernel/kapplication.cpp:302
#35 0xb73c996b in QCoreApplication::notifyInternal (this=0x84a5d80, receiver=0x86d5c40, event=0xbffdee1c) at kernel/qcoreapplication.cpp:610
#36 0xb69cd32e in QCoreApplication::sendSpontaneousEvent (receiver=0x86d5c40, event=0xbffdee1c, alienWidget=0x86d5c40, nativeWidget=0x8ab2af8, buttonDown=0xb723baa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#37 QApplicationPrivate::sendMouseEvent (receiver=0x86d5c40, event=0xbffdee1c, alienWidget=0x86d5c40, nativeWidget=0x8ab2af8, buttonDown=0xb723baa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#38 0xb6a3be55 in QETWidget::translateMouseEvent (this=0x8ab2af8, event=0xbffe03cc) at kernel/qapplication_x11.cpp:4409
#39 0xb6a3b336 in QApplication::x11ProcessEvent (this=0x84a5d80, event=0xbffe03cc) at kernel/qapplication_x11.cpp:3428
#40 0xb6a65842 in x11EventSourceDispatch (s=0x84a9068, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#41 0xb62d9368 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#42 0xb62dc8c3 in ?? () from /usr/lib/libglib-2.0.so.0
#43 0xb62dca48 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#44 0xb73f47f8 in QEventDispatcherGlib::processEvents (this=0x8490620, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#45 0xb6a64f85 in QGuiEventDispatcherGlib::processEvents (this=0x8490620, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#46 0xb73c7fba in QEventLoop::processEvents (this=0xbffe0630, flags=...) at kernel/qeventloop.cpp:149
#47 0xb73c8402 in QEventLoop::exec (this=0xbffe0630, flags=...) at kernel/qeventloop.cpp:201
#48 0xb73ca859 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#49 0xb69c5657 in QApplication::exec () at kernel/qapplication.cpp:3525
#50 0xb7ff1bb4 in kdemain (argc=1, argv=0xbffe08a4) at ../../../ksysguard/gui/ksysguard.cc:579
#51 0x080485b2 in main (argc=) at ksysguard_dummy.cpp:3

Reported using DrKonqi