All of a sudden I'm getting this on startup. Here's the vg.log ==2826== Memcheck, a memory error detector ==2826== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al. ==2826== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info ==2826== Command: /usr/bin/ktorrent --nofork ==2826== Parent PID: 1875 ==2826== ==2826== Conditional jump or move depends on uninitialised value(s) ==2826== at 0x4EC6BA2: bt::Peer::percentAvailable() const (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EC6CEA: bt::Peer::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ECEA08: bt::PeerManager::Private::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x450997: ??? (in /usr/bin/ktorrent) ==2826== by 0x42D28D: ??? (in /usr/bin/ktorrent) ==2826== by 0x435E6C: ??? (in /usr/bin/ktorrent) ==2826== by 0x803DF5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x8043BD2: QObject::event(QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7372CDB: QApplicationPrivate::notify_helper(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtGui.so.4.8.6) ==2826== by 0x7379C15: QApplication::notify(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtGui.so.4.8.6) ==2826== by 0x43D0F0: ??? (in /usr/bin/ktorrent) ==2826== by 0x802985C: QCoreApplication::notifyInternal(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== ==2826== Invalid write of size 8 ==2826== at 0x4C306DB: memcpy@@GLIBC_2.14 (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==2826== by 0x4F5948D: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED4B88: bt::UTMetaData::data(bt::BDictNode*, QByteArray const&) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED554E: bt::UTMetaData::handlePacket(unsigned char const*, unsigned int) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED2DBC: bt::PacketReader::update(bt::PeerInterface&) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EC6C27: bt::Peer::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ECEA08: bt::PeerManager::Private::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x450997: ??? (in /usr/bin/ktorrent) ==2826== by 0x42D28D: ??? (in /usr/bin/ktorrent) ==2826== by 0x435E6C: ??? (in /usr/bin/ktorrent) ==2826== by 0x803DF5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x8043BD2: QObject::event(QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== Address 0x21e1f6e0 is 0 bytes after a block of size 32 alloc'd ==2826== at 0x4C2BBCF: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==2826== by 0x7F1BC94: QByteArray::realloc(int) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x4F59472: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED4B88: bt::UTMetaData::data(bt::BDictNode*, QByteArray const&) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED554E: bt::UTMetaData::handlePacket(unsigned char const*, unsigned int) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED2DBC: bt::PacketReader::update(bt::PeerInterface&) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EC6C27: bt::Peer::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ECEA08: bt::PeerManager::Private::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x450997: ??? (in /usr/bin/ktorrent) ==2826== by 0x42D28D: ??? (in /usr/bin/ktorrent) ==2826== by 0x435E6C: ??? (in /usr/bin/ktorrent) ==2826== by 0x803DF5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== --2826-- VALGRIND INTERNAL ERROR: Valgrind received a signal 11 (SIGSEGV) - exiting --2826-- si_code=128; Faulting address: 0x0; sp: 0x802ca9e40 valgrind: the 'impossible' happened: Killed by fatal signal host stacktrace: ==2826== at 0x38091C62: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) ==2826== by 0x38051349: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) ==2826== by 0x380D4CD3: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) ==2826== by 0x380E3926: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) sched status: running_tid=1 Thread 1: status = VgTs_Runnable (lwpid 2826) ==2826== at 0x4C2DD9F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==2826== by 0x7F69AEF: QString::realloc(int) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F6D342: QString::append(QString const&) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x4E9E270: bt::Log::operator<<(QString const&) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4F58EFB: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4F591F2: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4F59567: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED4B88: bt::UTMetaData::data(bt::BDictNode*, QByteArray const&) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED554E: bt::UTMetaData::handlePacket(unsigned char const*, unsigned int) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED2DBC: bt::PacketReader::update(bt::PeerInterface&) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EC6C27: bt::Peer::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ECEA08: bt::PeerManager::Private::update() (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x450997: ??? (in /usr/bin/ktorrent) ==2826== by 0x42D28D: ??? (in /usr/bin/ktorrent) ==2826== by 0x435E6C: ??? (in /usr/bin/ktorrent) ==2826== by 0x803DF5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x8043BD2: QObject::event(QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7372CDB: QApplicationPrivate::notify_helper(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtGui.so.4.8.6) ==2826== by 0x7379C15: QApplication::notify(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtGui.so.4.8.6) ==2826== by 0x43D0F0: ??? (in /usr/bin/ktorrent) ==2826== by 0x802985C: QCoreApplication::notifyInternal(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x805C6BF: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x8059830: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xCCE7FF6: g_main_context_dispatch (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4600.1) ==2826== by 0xCCE824F: ??? (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4600.1) ==2826== by 0xCCE82FB: g_main_context_iteration (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4600.1) ==2826== by 0x805A1ED: QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x741DC25: ??? (in /usr/lib/x86_64-linux-gnu/libQtGui.so.4.8.6) ==2826== by 0x80280D0: QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x8028444: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x802E428: QCoreApplication::exec() (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x427C71: ??? (in /usr/bin/ktorrent) ==2826== by 0x8C52A3F: (below main) (libc-start.c:289) Thread 2: status = VgTs_WaitSys (lwpid 2859) ==2826== at 0xBDE5149: pthread_cond_timedwait@@GLIBC_2.3.2 (pthread_cond_timedwait.S:238) ==2826== by 0x7F1A263: QWaitCondition::wait(QMutex*, unsigned long) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F0CF96: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Thread 3: status = VgTs_WaitSys (lwpid 2860) ==2826== at 0x8D2D8DD: ??? (syscall-template.S:81) ==2826== by 0x131AAC29: send_dg (res_send.c:1101) ==2826== by 0x131AAC29: __libc_res_nsend (res_send.c:564) ==2826== by 0x131A8B43: __libc_res_nquery (res_query.c:227) ==2826== by 0x131A95E9: __libc_res_nquerydomain (res_query.c:594) ==2826== by 0x131A95E9: __libc_res_nsearch (res_query.c:433) ==2826== by 0x1C40BC78: _nss_dns_gethostbyname4_r (dns-host.c:315) ==2826== by 0x8D1DDAC: gaih_inet (getaddrinfo.c:862) ==2826== by 0x8D2132B: getaddrinfo (getaddrinfo.c:2417) ==2826== by 0x67ECC74: ??? (in /usr/lib/x86_64-linux-gnu/libQtNetwork.so.4.8.6) ==2826== by 0x67E1556: ??? (in /usr/lib/x86_64-linux-gnu/libQtNetwork.so.4.8.6) ==2826== by 0x7F0CDB9: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Thread 4: status = VgTs_WaitSys (lwpid 2861) ==2826== at 0xBDE5149: pthread_cond_timedwait@@GLIBC_2.3.2 (pthread_cond_timedwait.S:238) ==2826== by 0x7F1A263: QWaitCondition::wait(QMutex*, unsigned long) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F0CF96: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Thread 5: status = VgTs_WaitSys (lwpid 2862) ==2826== at 0xBDE5149: pthread_cond_timedwait@@GLIBC_2.3.2 (pthread_cond_timedwait.S:238) ==2826== by 0x7F1A263: QWaitCondition::wait(QMutex*, unsigned long) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F0CF96: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Thread 6: status = VgTs_WaitSys (lwpid 2873) ==2826== at 0xBDE5149: pthread_cond_timedwait@@GLIBC_2.3.2 (pthread_cond_timedwait.S:238) ==2826== by 0x7F1A263: QWaitCondition::wait(QMutex*, unsigned long) (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F0CF96: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Thread 7: status = VgTs_WaitSys (lwpid 2876) ==2826== at 0x8D2D8DD: ??? (syscall-template.S:81) ==2826== by 0x4EB373B: net::Poll::poll(int) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB05E3: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB0715: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB0918: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Thread 8: status = VgTs_WaitSys (lwpid 2877) ==2826== at 0x8D39F4F: send (send.c:31) ==2826== by 0x4EAD988: net::Socket::send(unsigned char const*, int) (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4ED9634: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EABCF0: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB1A07: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB1C8F: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB0B66: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB0D95: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB0224: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB0918: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Thread 9: status = VgTs_WaitSys (lwpid 2878) ==2826== at 0x8D2D8DD: ??? (syscall-template.S:81) ==2826== by 0x131AAC29: send_dg (res_send.c:1101) ==2826== by 0x131AAC29: __libc_res_nsend (res_send.c:564) ==2826== by 0x131A8B43: __libc_res_nquery (res_query.c:227) ==2826== by 0x1C40C03F: _nss_dns_gethostbyaddr2_r (dns-host.c:485) ==2826== by 0x1C40C502: _nss_dns_gethostbyaddr_r (dns-host.c:544) ==2826== by 0x8D4B78C: gethostbyaddr_r@@GLIBC_2.2.5 (getXXbyYY_r.c:266) ==2826== by 0x8D53ACF: getnameinfo (getnameinfo.c:224) ==2826== by 0x4EB2D45: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB2DC7: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x4EB3129: ??? (in /usr/lib/libktorrent.so.5.0.1) ==2826== by 0x7F19D1B: ??? (in /usr/lib/x86_64-linux-gnu/libQtCore.so.4.8.6) ==2826== by 0xBDDF6A9: start_thread (pthread_create.c:333) ==2826== by 0x8D38EEC: clone (clone.S:109) Note: see also the FAQ in the source distribution. It contains workarounds to several common problems. In particular, if Valgrind aborted or crashed after identifying problems in your program, there's a good chance that fixing those problems will prevent Valgrind aborting or crashing, especially if it happened in m_mallocfree.c. If that doesn't help, please report this bug to: www.valgrind.org In the bug report, send all the above text, the valgrind version, and what OS and version you are using. Thanks. Reproducible: Always Steps to Reproduce: 1. Start ktorrent. 2. crash.
Git commit 77d90c4f952b086027a24521fa35b66d2a2cd6a8 by Nick Shaforostoff. Committed on 28/02/2016 at 03:09. Pushed by shaforo into branch 'master'. blindly fix the crash M +6 -1 src/magnet/metadatadownload.cpp http://commits.kde.org/libktorrent/77d90c4f952b086027a24521fa35b66d2a2cd6a8
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!