Application: ktorrent (4.3.1)
KDE Platform Version: 4.14.8
Qt Version: 4.8.6
Operating System: Linux 3.19.0-25-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:

Ktorrent was running in the background when it crashed. There were no active downloads but about 30 torrents were seeding.

Not sure if it's connected, but I noticed an unusal behavior when it happened. For some reason I was unable to authenticate myself in gksudo when it crashed, for example to install ktorrent-dbg. Instead of the window to enter my password the error window appeared: "This operation cannot continue since proper authorization was not provided". I was able to authenticate in the console though. This never happened before, and I was not doing anything with the system when it did, so I don't know how to reproduce it.

-- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4c00210800 (LWP 1462))]

Thread 9 (Thread 0x7f4bea81d700 (LWP 1615)):
#0  0x00007f4bfc00849d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4bf7db52f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf7d7196c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf7d71e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf7d71fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bfccbe87e in QEventDispatcherGlib::processEvents (this=0x7f4bdc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#6  0x00007f4bfcc8dd21 in QEventLoop::processEvents (this=this@entry=0x7f4bea81cdd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f4bfcc8e085 in QEventLoop::exec (this=this@entry=0x7f4bea81cdd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f4bfcb81e89 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:538
#9  0x00007f4bfcb846ff in QThreadPrivate::start (arg=0xc32eb0) at thread/qthread_unix.cpp:349
#10 0x00007f4bf8ce76aa in start_thread (arg=0x7f4bea81d700) at pthread_create.c:333
#11 0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f4beb01e700 (LWP 2326)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4be350e81d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4be350e859 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f4bf8ce76aa in start_thread (arg=0x7f4beb01e700) at pthread_create.c:333
#4  0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f4b98765700 (LWP 2356)):
#0  0x00007f4bf7db6789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4bf7d71ea2 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf7d71fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bfccbe87e in QEventDispatcherGlib::processEvents (this=0x7f4be40013b0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007f4bfcc8dd21 in QEventLoop::processEvents (this=this@entry=0x7f4b98764dd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4bfcc8e085 in QEventLoop::exec (this=this@entry=0x7f4b98764dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f4bfcb81e89 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:538
#7  0x00007f4bfcb846ff in QThreadPrivate::start (arg=0x2d2a120) at thread/qthread_unix.cpp:349
#8  0x00007f4bf8ce76aa in start_thread (arg=0x7f4b98765700) at pthread_create.c:333
#9  0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4b978db700 (LWP 2357)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4be324f20d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4be353dfd6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f4bf8ce76aa in start_thread (arg=0x7f4b978db700) at pthread_create.c:333
#4  0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4b7feff700 (LWP 2372)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4bfcb83062 in _q_futex (val2=<optimized out>, addr2=<optimized out>, timeout=<optimized out>, val=<optimized out>, op=<optimized out>, addr=<optimized out>) at thread/qmutex_unix.cpp:99
#2  QMutexPrivate::wait (this=0xa6a600, timeout=-1000000) at thread/qmutex_unix.cpp:113
#3  0x00007f4bfcb7f42d in QMutex::lock (this=<optimized out>) at thread/qmutex.cpp:164
#4  0x00007f4bffd07ff9 in net::SocketMonitor::lock (this=<optimized out>) at ../../src/net/socketmonitor.cpp:108
#5  0x00007f4bffd0984c in net::DownloadThread::update (this=0xa6a630) at ../../src/net/downloadthread.cpp:51
#6  0x00007f4bffd09a49 in net::NetworkThread::run (this=0xa6a630) at ../../src/net/networkthread.cpp:48
#7  0x00007f4bfcb846ff in QThreadPrivate::start (arg=0xa6a630) at thread/qthread_unix.cpp:349
#8  0x00007f4bf8ce76aa in start_thread (arg=0x7f4b7feff700) at pthread_create.c:333
#9  0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4b7f6fe700 (LWP 2373)):
#0  net::Socket::ok (this=0x6045050) at ../../src/net/socket.h:50
#1  0x00007f4bffd0917e in net::UploadThread::update (this=0xa6aa20) at ../../src/net/uploadthread.cpp:57
#2  0x00007f4bffd09a49 in net::NetworkThread::run (this=0xa6aa20) at ../../src/net/networkthread.cpp:48
#3  0x00007f4bfcb846ff in QThreadPrivate::start (arg=0xa6aa20) at thread/qthread_unix.cpp:349
#4  0x00007f4bf8ce76aa in start_thread (arg=0x7f4b7f6fe700) at pthread_create.c:333
#5  0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4b7eefd700 (LWP 2374)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4bfcb84c56 in wait (time=18446744073709551615, this=0x328f0c0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x31df8e8, mutex=mutex@entry=0x31df8e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f4bffd0c32a in net::ReverseResolverThread::run (this=0x31df8d0) at ../../src/net/reverseresolver.cpp:124
#4  0x00007f4bfcb846ff in QThreadPrivate::start (arg=0x31df8d0) at thread/qthread_unix.cpp:349
#5  0x00007f4bf8ce76aa in start_thread (arg=0x7f4b7eefd700) at pthread_create.c:333
#6  0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4b964d9700 (LWP 6334)):
#0  0x00007f4bf7db6789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4bf7d71641 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf7d71e37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf7d71fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bfccbe87e in QEventDispatcherGlib::processEvents (this=0x7f4b8c001c20, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x00007f4bfcc8dd21 in QEventLoop::processEvents (this=this@entry=0x7f4b964d8d80, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f4bfcc8e085 in QEventLoop::exec (this=this@entry=0x7f4b964d8d80, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f4bfcb81e89 in QThread::exec (this=this@entry=0x40297a0) at thread/qthread.cpp:538
#8  0x00007f4bfcc6e493 in QInotifyFileSystemWatcherEngine::run (this=0x40297a0) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f4bfcb846ff in QThreadPrivate::start (arg=0x40297a0) at thread/qthread_unix.cpp:349
#10 0x00007f4bf8ce76aa in start_thread (arg=0x7f4b964d9700) at pthread_create.c:333
#11 0x00007f4bfc017eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4c00210800 (LWP 1462)):
[KCrash Handler]
#6  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:33
#7  0x00007f4bffd10093 in mse::EncryptedAuthenticate::handlePadD (this=0x5a557a0) at ../../src/mse/encryptedauthenticate.cpp:241
#8  0x00007f4bffd13994 in bt::AuthenticationMonitor::handleData (this=0x6d9ee0 <bt::AuthenticationMonitor::self>) at ../../src/peer/authenticationmonitor.cpp:136
#9  0x00007f4bffd13b7e in bt::AuthenticationMonitor::update (this=<optimized out>) at ../../src/peer/authenticationmonitor.cpp:111
#10 0x000000000042badf in kt::Core::update (this=0xcc4580) at ../../ktorrent/core.cpp:1047
#11 0x0000000000433db5 in kt::Core::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./core.moc:142
#12 0x00007f4bfcca41ec in QMetaObject::activate (sender=0xcc45a8, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3567
#13 0x00007f4bfcca87b3 in QObject::event (this=0xcc45a8, e=<optimized out>) at kernel/qobject.cpp:1253
#14 0x00007f4bfd1c19bc in QApplicationPrivate::notify_helper (this=this@entry=0xa9f760, receiver=receiver@entry=0xcc45a8, e=e@entry=0x7ffde801b430) at kernel/qapplication.cpp:4570
#15 0x00007f4bfd1c84d8 in QApplication::notify (this=0x7ffde801c390, receiver=0xcc45a8, e=0x7ffde801b430) at kernel/qapplication.cpp:4356
#16 0x000000000043a5d2 in kt::App::notify (this=<optimized out>, receiver=<optimized out>, event=<optimized out>) at ../../ktorrent/app.cpp:99
#17 0x00007f4bfcc8f1cd in QCoreApplication::notifyInternal (this=0x7ffde801c390, receiver=0xcc45a8, event=event@entry=0x7ffde801b430) at kernel/qcoreapplication.cpp:955
#18 0x00007f4bfccc0e9b in sendEvent (event=0x7ffde801b430, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QTimerInfoList::activateTimers (this=0xa9fd00) at kernel/qeventdispatcher_unix.cpp:621
#20 0x00007f4bfccbdec9 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:193
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:240
#22 0x00007f4bf7d71c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f4bf7d71f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f4bf7d71fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f4bfccbe85e in QEventDispatcherGlib::processEvents (this=0xa9d130, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#26 0x00007f4bfd269c66 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f4bfcc8dd21 in QEventLoop::processEvents (this=this@entry=0x7ffde801b6b0, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f4bfcc8e085 in QEventLoop::exec (this=this@entry=0x7ffde801b6b0, flags=...) at kernel/qeventloop.cpp:204
#29 0x00007f4bfcc93b09 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#30 0x00007f4bfd1bfc1c in QApplication::exec () at kernel/qapplication.cpp:3828
#31 0x0000000000427838 in main (argc=3, argv=<optimized out>) at ../../ktorrent/main.cpp:186

Reported using DrKonqi