Bug 503929

Summary: Connecting to FTP via Dolphin caused background crash when it became unavailable.
Product: [Frameworks and Libraries] frameworks-kio Reporter: Roke Julian Lockhart Beedell <4wy78uwh>
Component: generalAssignee: KIO Bugs <kio-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash CC: kdelibs-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 6.13.0   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report: https://crash-reports.kde.org/organizations/kde/issues/176359/events/f0d57732908047bfacdb8aa02691f6e4/

Description Roke Julian Lockhart Beedell 2025-05-08 14:31:56 UTC 
Application: kioworker (6.13.0)

ApplicationNotResponding [ANR]: false
Qt Version: 6.9.0
Frameworks Version: 6.13.0
Operating System: Linux 6.14.5-300.fc42.x86_64 x86_64
Windowing System: Wayland
Distribution: "Fedora Linux 42 (KDE Plasma Desktop Edition)"
DrKonqi: 6.3.4 [CoredumpBackend]

-- Information about the crash:
As https://bugzilla.redhat.com/show_bug.cgi?id=2365102 explains, when I connected to ftp://192.168.1.183:2211/, when the server went offline due to https://github.com/TeamAmaze/AmazeFileManager/issues/4398#issue-3049099201, I saw Dr Konqi.

The crash does not seem to be reproducible.

-- Backtrace:
Application: kioworker (kioworker), signal: Segmentation fault
Content of s_kcrashErrorMessage: std::unique_ptr<char []> = {get() = <optimized out>}
Downloading 328.45 K separate debug info for /usr/libexec/kf6/kioworker...
Downloading 4.40 M separate debug info for /home/RokeJulianLockhart/.cache/debuginfod_client/96fcdafb3ae855ba4e18c6240605637690a97655/debuginfo...
[New LWP 3273]
[New LWP 3275]
[New LWP 3274]
[New LWP 3277]
[New LWP 3276]
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Downloading separate debug info for system-supplied DSO at 0x7f1e701ae000...
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/libexec/kf6/kioworker /usr/lib64/qt6/plugins/kf6/kio/kio_ftp.so ftp '' local:/run/user/1000/dolphinhufyPS.27.kioworker.socket'.
Program terminated with signal SIGSEGV, Segmentation fault.
Downloading source file /usr/src/debug/glibc-2.41-5.fc42.x86_64/nptl/pthread_kill.c...
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=11, no_tid=no_tid@entry=0) at pthread_kill.c:44
44	      return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;
[Current thread is 1 (Thread 0x7f1e6a44b380 (LWP 3273))]
Function(s) ^std::(move|forward|as_const|(__)?addressof) will be skipped when stepping.
Function(s) ^std::(shared|unique)_ptr<.*>::(get|operator) will be skipped when stepping.
Function(s) ^std::(basic_string|vector|array|deque|(forward_)?list|(unordered_|flat_)?(multi)?(map|set)|span)<.*>::(c?r?(begin|end)|front|back|data|size|empty) will be skipped when stepping.
Function(s) ^std::(basic_string|vector|array|deque|span)<.*>::operator.] will be skipped when stepping.

Cannot QML trace cores :(
/usr/share/drkonqi/gdb/python/gdb_preamble/preamble.py:547: DeprecationWarning: datetime.datetime.utcfromtimestamp() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.fromtimestamp(timestamp, datetime.UTC).
  boot_time = datetime.utcfromtimestamp(psutil.boot_time()).strftime('%Y-%m-%dT%H:%M:%S')
Downloading source file /usr/src/debug/glibc-2.41-5.fc42.x86_64/misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S...
Downloading source file /usr/src/debug/glibc-2.41-5.fc42.x86_64/nptl/pthread_create.c...
Downloading 53.29 K source file /usr/src/debug/glib2-2.84.1-1.fc42.x86_64/redhat-linux-build/../glib/gthread.c...
Downloading 81.02 K source file /usr/src/debug/glib2-2.84.1-1.fc42.x86_64/redhat-linux-build/../gio/gdbusprivate.c...
Downloading source file /usr/src/debug/glib2-2.84.1-1.fc42.x86_64/redhat-linux-build/../glib/gmain.c...
Downloading source file /usr/include/bits/poll2.h...
Downloading source file /usr/src/debug/glibc-2.41-5.fc42.x86_64/io/../sysdeps/unix/sysv/linux/ppoll.c...
Downloading source file /usr/src/debug/glibc-2.41-5.fc42.x86_64/nptl/cancellation.c...
Downloading source file /usr/src/debug/glibc-2.41-5.fc42.x86_64/nptl/../sysdeps/unix/sysv/linux/x86_64/syscall_cancel.S...
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Downloading source file /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/thread/qthread.cpp...
Downloading source file /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/global/qflags.h...
Downloading source file /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp...
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Downloading 86.29 K source file /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/kioworkers/ftp/ftp.cpp...
Downloading source file /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/core/workerbase.cpp...
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Downloading source file /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/core/workerbase_p.h...
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Downloading 73.48 K source file /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/io/qiodevice.cpp...
Downloading source file /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/io/qiodevice.h...
Downloading 7.98 K source file /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/global/qtclasshelpermacros.h...
Downloading 6.15 K source file /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/tools/qscopedpointer.h...
/usr/share/drkonqi/gdb/python/gdb_preamble/preamble.py:564: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
  'timestamp': datetime.utcnow().isoformat(),
[Current thread is 1 (Thread 0x7f1e6a44b380 (LWP 3273))]

Thread 5 (Thread 0x7f1e5b3fd6c0 (LWP 3276)):
#0  __syscall_cancel_arch () at ../sysdeps/unix/sysv/linux/x86_64/syscall_cancel.S:56
#1  0x00007f1e6f67b9da in __internal_syscall_cancel (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5@entry=8, a6=a6@entry=0, nr=271) at cancellation.c:49
#2  0x00007f1e6f67ba24 in __syscall_cancel (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5@entry=8, a6=a6@entry=0, nr=271) at cancellation.c:75
#3  0x00007f1e6f6f5176 in __GI_ppoll (fds=fds@entry=0x7f1e4c000bb0, nfds=nfds@entry=2, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:42
#4  0x00007f1e6e4f5210 in ppoll (__fds=0x7f1e4c000bb0, __nfds=2, __timeout=0x0, __ss=0x0) at /usr/include/bits/poll2.h:101
#5  g_main_context_poll_unlocked (priority=<optimized out>, context=0x56029a01a810, timeout_usec=<optimized out>, fds=0x7f1e4c000bb0, n_fds=2) at ../glib/gmain.c:4632
#6  g_main_context_iterate_unlocked (context=0x56029a01a810, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4309
#7  0x00007f1e6e4f53cf in g_main_loop_run (loop=0x56029a01aa20) at ../glib/gmain.c:4516
#8  0x00007f1e6ac952b2 in gdbus_shared_thread_func (user_data=0x56029a01c030) at ../gio/gdbusprivate.c:284
#9  0x00007f1e6e5228e2 in g_thread_proxy (data=0x56029a01aa40) at ../glib/gthread.c:893
#10 0x00007f1e6f67f1d4 in start_thread (arg=<optimized out>) at pthread_create.c:448
#11 0x00007f1e6f701cec in __GI___clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 4 (Thread 0x7f1e5abfc6c0 (LWP 3277)):
#0  __syscall_cancel_arch () at ../sysdeps/unix/sysv/linux/x86_64/syscall_cancel.S:56
#1  0x00007f1e6f67b9da in __internal_syscall_cancel (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5@entry=8, a6=a6@entry=0, nr=271) at cancellation.c:49
#2  0x00007f1e6f67ba24 in __syscall_cancel (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5@entry=8, a6=a6@entry=0, nr=271) at cancellation.c:75
#3  0x00007f1e6f6f5176 in __GI_ppoll (fds=fds@entry=0x56029a34dae0, nfds=nfds@entry=2, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:42
#4  0x00007f1e6e4f5210 in ppoll (__fds=0x56029a34dae0, __nfds=2, __timeout=0x0, __ss=0x0) at /usr/include/bits/poll2.h:101
#5  g_main_context_poll_unlocked (priority=<optimized out>, context=0x7f1e50000c60, timeout_usec=<optimized out>, fds=0x56029a34dae0, n_fds=2) at ../glib/gmain.c:4632
#6  g_main_context_iterate_unlocked (context=context@entry=0x7f1e50000c60, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4309
#7  0x00007f1e6e4f52d3 in g_main_context_iteration (context=0x7f1e50000c60, may_block=1) at ../glib/gmain.c:4379
#8  0x00007f1e6fbff56d in QEventDispatcherGlib::processEvents (this=0x7f1e50000b70, flags=...) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#9  0x00007f1e6f903783 in QEventLoop::exec (this=this@entry=0x7f1e5abfb7b0, flags=..., flags@entry=...) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/global/qflags.h:77
#10 0x00007f1e6fa217fd in QThread::exec (this=this@entry=0x7f1e6f1fecc0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/thread/qthread.cpp:644
#11 0x00007f1e6f14e901 in QDBusConnectionManager::run (this=0x7f1e6f1fecc0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/dbus/qdbusconnectionmanager.cpp:144
#12 0x00007f1e6fabdde4 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/thread/qthread_unix.cpp:433
#13 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/thread/qthread_unix.cpp:365
#14 QThreadPrivate::start (arg=0x7f1e6f1fecc0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/thread/qthread_unix.cpp:393
#15 0x00007f1e6f67f1d4 in start_thread (arg=<optimized out>) at pthread_create.c:448
#16 0x00007f1e6f701cec in __GI___clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 3 (Thread 0x7f1e5c3ff6c0 (LWP 3274)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f1e6e5183ed in g_cond_wait_impl (cond=0x56029a00d418, mutex=0x56029a00d410) at ../glib/gthread-posix.c:1026
#2  g_cond_wait (cond=0x56029a00d418, mutex=0x56029a00d410) at ../glib/gthread.c:1686
#3  0x00007f1e6e4b4e2c in g_async_queue_pop_intern_unlocked (queue=0x56029a00d410, wait=1, end_time=-1) at ../glib/gasyncqueue.c:375
#4  0x00007f1e6e522d94 in g_thread_pool_spawn_thread (data=<optimized out>) at ../glib/gthreadpool.c:297
#5  0x00007f1e6e5228e2 in g_thread_proxy (data=0x56029a00f6d0) at ../glib/gthread.c:893
#6  0x00007f1e6f67f1d4 in start_thread (arg=<optimized out>) at pthread_create.c:448
#7  0x00007f1e6f701cec in __GI___clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 2 (Thread 0x7f1e5bbfe6c0 (LWP 3275)):
#0  __syscall_cancel_arch () at ../sysdeps/unix/sysv/linux/x86_64/syscall_cancel.S:56
#1  0x00007f1e6f67b9da in __internal_syscall_cancel (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5@entry=8, a6=a6@entry=0, nr=271) at cancellation.c:49
#2  0x00007f1e6f67ba24 in __syscall_cancel (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5@entry=8, a6=a6@entry=0, nr=271) at cancellation.c:75
#3  0x00007f1e6f6f5176 in __GI_ppoll (fds=fds@entry=0x7f1e54000b70, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:42
#4  0x00007f1e6e4f5210 in ppoll (__fds=0x7f1e54000b70, __nfds=1, __timeout=0x0, __ss=0x0) at /usr/include/bits/poll2.h:101
#5  g_main_context_poll_unlocked (priority=<optimized out>, context=0x56029a00f830, timeout_usec=<optimized out>, fds=0x7f1e54000b70, n_fds=1) at ../glib/gmain.c:4632
#6  g_main_context_iterate_unlocked (context=context@entry=0x56029a00f830, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4309
#7  0x00007f1e6e4f52d3 in g_main_context_iteration (context=0x56029a00f830, may_block=may_block@entry=1) at ../glib/gmain.c:4379
#8  0x00007f1e6e4f5321 in glib_worker_main (data=<optimized out>) at ../glib/gmain.c:6578
#9  0x00007f1e6e5228e2 in g_thread_proxy (data=0x56029a00fa70) at ../glib/gthread.c:893
#10 0x00007f1e6f67f1d4 in start_thread (arg=<optimized out>) at pthread_create.c:448
#11 0x00007f1e6f701cec in __GI___clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 1 (Thread 0x7f1e6a44b380 (LWP 3273)):
[KCrash Handler]
#5  0x00007f1e6f8b6021 in QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::get (this=0x8) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/tools/qscopedpointer.h:112
#6  qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > > (ptr=...) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/global/qtclasshelpermacros.h:137
#7  QIODevice::d_func (this=0x0) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/io/qiodevice.h:146
#8  QIODevice::write (this=0x0, data=...) at /usr/src/debug/qt6-qtbase-6.9.0-2.fc42.x86_64/src/corelib/io/qiodevice.cpp:1867
#9  0x00007f1e6a4256e0 in FtpInternal::ftpSendCmd (this=0x560299fd2b20, cmd=..., maxretries=1) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/kioworkers/ftp/ftp.cpp:721
#10 0x00007f1e6a431800 in FtpInternal::ftpFolder (this=0x560299fd2b20, path=...) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/kioworkers/ftp/ftp.cpp:2200
#11 0x00007f1e6a42bfe9 in FtpInternal::stat (this=0x560299fd2b20, url=...) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/kioworkers/ftp/ftp.cpp:1378
#12 0x00007f1e6a42f5b6 in Ftp::stat (this=<optimized out>, url=...) at /usr/include/c++/15/bits/unique_ptr.h:193
#13 0x00007f1e70067190 in KIO::WorkerSlaveBaseBridge::stat (this=0x560299fa2df0, url=...) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/core/workerbase_p.h:111
#14 0x00007f1e70063f0e in KIO::SlaveBase::dispatch (this=0x560299fa2df0, command=69, data=...) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/core/slavebase.cpp:1221
#15 0x00007f1e70061b2e in KIO::SlaveBase::dispatchLoop() [clone .constprop.0] (this=<optimized out>) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/core/slavebase.cpp:363
#16 0x00007f1e70064a2d in KIO::WorkerBase::dispatchLoop (this=<optimized out>) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/core/workerbase.cpp:27
#17 0x00007f1e6a42f30f in kdemain (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kf6-kio-6.13.0-2.fc42.x86_64/src/kioworkers/ftp/ftp.cpp:177
#18 0x00005602914a882a in main (argc=5, argv=0x7ffe17324c98) at /usr/include/qt6/QtCore/qvarlengtharray.h:89

Reported using DrKonqi
Comment 1 Roke Julian Lockhart Beedell 2025-05-08 14:32:53 UTC 

*** This bug has been marked as a duplicate of bug 503928 ***