[KRdp] [Bug 488687] krdpserver or the portal it uses freezes after a non-H264 capable client attempts to connect

Wed Jul 10 10:25:45 BST 2024

https://bugs.kde.org/show_bug.cgi?id=488687

--- Comment #2 from Akseli Lahtinen <akselmo at akselmo.dev> ---
A potential backtrace

Program terminated with signal SIGABRT, Aborted.
#0  0x00007f540bca2be9 in __futex_abstimed_wait_common64 (private=0,
futex_word=0x7f53e800f820, expected=0,
op=393, abstime=0x0, cancel=true) at futex-internal.c:57
Downloading source file
/usr/src/debug/glibc-2.39-17.fc40.x86_64/nptl/futex-internal.c
57          return INTERNAL_SYSCALL_CANCEL (futex_time64, futex_word, op,
expected,
[Current thread is 1 (Thread 0x7f53fcaa33c0 (LWP 22224))]
Missing separate debuginfos, use: dnf debuginfo-install
ffmpeg-libs-6.1.1-11.fc40.x86_64
x264-libs-0.164-13.20231001git31e19f92.fc40.x86_64 x265-libs-3.6-2.fc40.x86_64
(gdb) bt
#0  0x00007f540bca2be9 in __futex_abstimed_wait_common64
(private=0, futex_word=0x7f53e800f820, expected=0, op=393, abstime=0x0,
cancel=true)
at futex-internal.c:57
#1  __futex_abstimed_wait_common
(futex_word=futex_word at entry=0x7f53e800f820, expected=expected at entry=0,
clockid=clockid at entry=0, abstime=abstime at entry=0x0, private=private at entry=0,
cancel=cancel at entry=true) at futex-internal.c:87
#2  0x00007f540bca2c6f in __GI___futex_abstimed_wait_cancelable64
(futex_word=futex_word at entry=0x7f53e800f820, expected=expected at entry=0,
clockid=clockid at entry=0, abstime=abstime at entry=0x0, private=private at entry=0) at
futex-internal.c:139
#3  0x00007f540bca5639 in __pthread_cond_wait_common
(cond=0x7f53e800f7f8, mutex=<optimized out>, clockid=0, abstime=0x0) at
pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x7f53e800f7f8, mutex=<optimized out>) at
pthread_cond_wait.c:618
#5  0x00007f540c560efb in QWaitConditionPrivate::wait (this=0x7f53e800f7d0,
deadline=...)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/thread/qwaitcondition_unix.cpp:102
#6  QWaitCondition::wait (this=this at entry=0x20ed12e8,
mutex=mutex at entry=0x20ed12c8, deadline=...)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/thread/qwaitcondition_unix.cpp:180
#7  0x00007f540c5542c1 in QThread::wait (this=<optimized out>, deadline=...)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/thread/qthread_unix.cpp:775
#8  0x00007f540de566e8 in PipeWireBaseEncodedStream::refresh
(this=this at entry=0x20e7b7a0)
at /usr/include/qt6/QtCore/qdeadlinetimer.h:31
#9  0x00007f540de5695e in PipeWireBaseEncodedStream::setActive
(this=0x20e7b7a0, active=false)
at
/home/akseli/Repositories/kde/src/kpipewire/src/pipewirebaseencodedstream.cpp:148
#10 0x00007f540c3fc872 in QtPrivate::QSlotObjectBase::call
(this=0x7f53e8010c60, r=<optimized out>, a=0x7ffcdaa9f8d0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qobjectdefs_impl.h:469
#11 doActivate<false> (sender=0x20f27720, signal_index=0, argv=0x7ffcdaa9f8d0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qobject.cpp:4086
#12 0x00007f540c3f2b47 in QMetaObject::activate
(sender=sender at entry=0x20f27720, m=m at entry=0x7f540c884ea0,
local_signal_index=local_signal_index at entry=0, argv=argv at entry=0x7ffcdaa9f8d0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qobject.cpp:4146
#13 0x00007f540c3f2c01 in QObject::destroyed (this=this at entry=0x20f27720,
_t1=<optimized out>,
_t1 at entry=0x20f27720)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/redhat-linux-build/src/corelib/kernel/moc_qobject.cpp:229--Type
<RET> for more, q to quit, c to continue without paging--c

\#14 0x00007f540c3f948e in QObject::~QObject (this=<optimized out>,
__in_chrg=<optimized out>)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qobject.cpp:1074
#15 0x00007f540e5c1369 in KRdp::VideoStream::~VideoStream (this=0x20f27720,
__in_chrg=<optimized out>)
at /home/akseli/Repositories/kde/src/krdp/src/VideoStream.cpp:155
#16 0x00007f540e5b23fa in std::default_delete<KRdp::VideoStream>::operator()
(this=<optimized out>, __ptr=<optimized out>) at
/usr/include/c++/14/bits/unique_ptr.h:87
#17 std::unique_ptr<KRdp::VideoStream, std::default_delete<KRdp::VideoStream>
>::~unique_ptr
(this=0x20bdc330, __in_chrg=<optimized out>) at
/usr/include/c++/14/bits/unique_ptr.h:398
#18 KRdp::RdpConnection::Private::~Private (this=0x20bdc310,
__in_chrg=<optimized out>)
at /home/akseli/Repositories/kde/src/krdp/src/RdpConnection.cpp:136
#19 std::default_delete<KRdp::RdpConnection::Private>::operator()
(this=<optimized out>, __ptr=0x20bdc310)
at /usr/include/c++/14/bits/unique_ptr.h:93
#20 std::default_delete<KRdp::RdpConnection::Private>::operator()
(this=<optimized out>, __ptr=0x20bdc310)
at /usr/include/c++/14/bits/unique_ptr.h:87
#21 std::unique_ptr<KRdp::RdpConnection::Private,
std::default_delete<KRdp::RdpConnection::Private> >::~unique_ptr
(this=0x20f27790, __in_chrg=<optimized out>) at
/usr/include/c++/14/bits/unique_ptr.h:398
#22 KRdp::RdpConnection::~RdpConnection (this=0x20f27780, __in_chrg=<optimized
out>)
at /home/akseli/Repositories/kde/src/krdp/src/RdpConnection.cpp:192
#23 0x00007f540e5b24a9 in KRdp::RdpConnection::~RdpConnection (this=0x20f27780,
__in_chrg=<optimized out>)
at /home/akseli/Repositories/kde/src/krdp/src/RdpConnection.cpp:192
#24 0x00007f540c3edd4b in QObject::event (this=0x7ffcdaaa0330,
e=0x7f53a801a9d0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qobject.cpp:1452
#25 0x00007f540d58b218 in QApplicationPrivate::notify_helper
(this=<optimized out>, receiver=0x7ffcdaaa0330, e=0x7f53a801a9d0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/widgets/kernel/qapplication.cpp:3287
#26 0x00007f540c396dc8 in QCoreApplication::notifyInternal2
(receiver=0x7ffcdaaa0330, event=0x7f53a801a9d0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1142
#27 0x00007f540c39702d in QCoreApplication::sendEvent (receiver=<optimized
out>, event=<optimized out>)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1583
#28 0x00007f540c39ab91 in QCoreApplicationPrivate::sendPostedEvents
(receiver=0x0, event_type=0, data=0x20b883c0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1940
#29 0x00007f540c39ae3d in QCoreApplication::sendPostedEvents
(receiver=<optimized out>, event_type=<optimized out>)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1797
#30 0x00007f540c6858ef in postEventSourceDispatch (s=0x20c29bd0)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:244
#31 0x00007f540c10ee8c in g_main_dispatch (context=0x7f53e8000f00) at
../glib/gmain.c:3344
#32 g_main_context_dispatch_unlocked (context=0x7f53e8000f00) at
../glib/gmain.c:4152
#33 0x00007f540c170c98 in g_main_context_iterate_unlocked.isra.0
(context=context at entry=0x7f53e8000f00, block=block at entry=1,
dispatch=dispatch at entry=1, self=<optimized out>) at ../glib/gmain.c:4217
#34 0x00007f540c110383 in g_main_context_iteration (context=0x7f53e8000f00,
may_block=1)
at ../glib/gmain.c:4282
#35 0x00007f540c6850a3 in QEventDispatcherGlib::processEvents (this=0x20b43870,
flags=...)
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:394
#36 0x00007f540c3a3b03 in QEventLoop::exec (this=this at entry=0x7ffcdaa9fe60,
flags=..., flags at entry=...)
at /usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/global/qflags.h:34
#37 0x00007f540c39f9bc in QCoreApplication::exec ()
at /usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/corelib/global/qflags.h:74
#38 0x00007f540cbd67ed in QGuiApplication::exec ()
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/gui/kernel/qguiapplication.cpp:1926
#39 0x00007f540d58b189 in QApplication::exec ()
at
/usr/src/debug/qt6-qtbase-6.7.2-2.fc40.x86_64/src/widgets/kernel/qapplication.cpp:2555
#40 0x000000000040710a in main (argc=<optimized out>, argv=<optimized out>)
at /home/akseli/Repositories/kde/src/krdp/server/main.cpp:112

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