https://bugs.kde.org/show_bug.cgi?id=527403
Bug ID: 527403
Summary: baloo_file_extractor repeatedly crashes
Classification: Frameworks and Libraries
Product: frameworks-baloo
Version First unspecified
Reported In:
Platform: Neon
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: Baloo File Daemon
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
DESCRIPTION
baloo_file_extractor repeatedly crashes on boot (see "case 1") and sometimes on
specific tools run (see "case 2").
STEPS TO REPRODUCE
Case 1:
1. Start my system
2. Log in to start a Plasma 6.8 Wayland session
3. The crashes begin automatically
- Not sure of the exact steps because it's automatic.
Case 2:
1. Run some tool (I'm working on a CMake project, so I was to run `cmake
--build`)
2. The tool works as normal, but system notifies that baloo_file_extractor just
crashed
- The crash dump generated in these two recipes looked just identical. So I
guess is the same issue.
OBSERVED RESULT
Case 1: Over an indeterminate period of time (can be a few minutes), it crashes
again and again, then suddenly it stops on its own.
Case 2: Crashes 1~2 times per tool execution.
EXPECTED RESULT
This never happened back with Plasma 6.7.5. I just updated to 6.8 and the
crashes began after the very first reboot.
SOFTWARE/OS VERSIONS
pci id for fd 9: 10de:2d19, driver (null)
pci id for fd 10: 10de:2d19, driver (null)
pci id for fd 9: 10de:2d19, driver (null)
pci id for fd 10: 10de:2d19, driver (null)
Operating System: KDE neon User Edition
KDE Plasma Version: 6.8.0
KDE Frameworks Version: 6.31.0
Qt Version: 6.11.1
Kernel Version: 7.0.0-38-generic (64-bit)
Graphics Platform: Wayland
Processors: 24 × Intel® Core™ i7-14650HX
Memory: 32 GiB of RAM (31.1 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 5060 Laptop GPU
Graphics Processor 2: Mesa Intel® Graphics
ADDITIONAL INFORMATION
[Backtrace]
Crash dumps in either case looked the same:
```
$ coredumpctl debug baloo_file_extr
PID: 6684 (baloo_file_extr)
UID: 1000 (mtzn)
GID: 1000 (mtzn)
Signal: 6 (ABRT)
Timestamp: Mon 2026-10-19 11:07:05 CST (5min ago)
Command Line: /usr/lib/x86_64-linux-gnu/libexec/kf6/baloo_file_extractor
Executable: /usr/lib/x86_64-linux-gnu/libexec/kf6/baloo_file_extractor
Control Group:
/user.slice/user-1000.slice/[email protected]/background.slice/kde-baloo.service
Unit: [email protected]
User Unit: kde-baloo.service
Slice: user-1000.slice
Owner UID: 1000 (mtzn)
Boot ID: 688dbde5d1444189bd9bb165695b0cd0
Machine ID: 4305be4d2413459da80e5799cd9811b7
Hostname: NEON-MECHREVO
Storage:
/var/lib/systemd/coredump/core.baloo_file_extr.1000.688dbde5d1444189bd9bb165695b0cd0.6684.1792379225000000.zst
(present)
Size on Disk: 645.5K
Message: Process 6684 (baloo_file_extr) of user 1000 dumped core.
Module libgomp.so.1 from deb
gcc-14-14.2.0-4ubuntu2~24.04.1.amd64
Module libzstd.so.1 from deb
libzstd-1.5.5+dfsg2-2build1.1.amd64
Module libsystemd.so.0 from deb systemd-255.4-1ubuntu8.18.amd64
Module libgcc_s.so.1 from deb
gcc-14-14.2.0-4ubuntu2~24.04.1.amd64
Module libudev.so.1 from deb systemd-255.4-1ubuntu8.18.amd64
Module libstdc++.so.6 from deb
gcc-14-14.2.0-4ubuntu2~24.04.1.amd64
Stack trace of thread 6684:
#0 0x000075788b49ec0c __pthread_kill_implementation (libc.so.6
+ 0x9ec0c)
#1 0x000075788b44527e __GI_raise (libc.so.6 + 0x4527e)
#2 0x000075788b4288ff __GI_abort (libc.so.6 + 0x288ff)
#3 0x000075788c14f7a1 _Z6qAbortv (libQt6Core.so.6 + 0x54f7a1)
#4 0x000075788c15028b _ZNK14QMessageLogger5fatalEPKcz
(libQt6Core.so.6 + 0x55028b)
#5 0x000075788c6d6b24 init_platform (libQt6Gui.so.6 +
0x2d6b24)
#6 0x000075788c6d4630
_ZN22QGuiApplicationPrivate21createEventDispatcherEv (libQt6Gui.so.6 +
0x2d4630)
#7 0x000075788c0f6ba9 _ZN23QCoreApplicationPrivate4initEv
(libQt6Core.so.6 + 0x4f6ba9)
#8 0x000075788c6d4730 _ZN22QGuiApplicationPrivate4initEv
(libQt6Gui.so.6 + 0x2d4730)
#9 0x000075788c6d57e5 _ZN15QGuiApplicationC2ERiPPci
(libQt6Gui.so.6 + 0x2d57e5)
#10 0x000064611ac1b476 main (baloo_file_extractor + 0xc476)
#11 0x000075788b42a1ca __libc_start_call_main (libc.so.6 +
0x2a1ca)
#12 0x000075788b42a28b __libc_start_main_impl (libc.so.6 +
0x2a28b)
#13 0x000064611ac1b685 _start (baloo_file_extractor + 0xc685)
Stack trace of thread 6689:
#0 0x000075788b51b79d __GI___poll (libc.so.6 + 0x11b79d)
#1 0x000075788b773b4e g_main_context_poll_unlocked
(libglib-2.0.so.0 + 0xbcb4e)
#2 0x000075788b713ad3 g_main_context_iteration
(libglib-2.0.so.0 + 0x5cad3)
#3 0x000075788bebecbf
_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt6Core.so.6 + 0x2becbf)
#4 0x000075788c0fd1bb
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 +
0x4fd1bb)
#5 0x000075788bffcb0c _ZN7QThread4execEv (libQt6Core.so.6 +
0x3fcb0c)
#6 0x000075788cdbb8bd _ZN22QDBusConnectionManager3runEv
(libQt6DBus.so.6 + 0xa48bd)
#7 0x000075788bfbd457 _ZN14QThreadPrivate5startEPv
(libQt6Core.so.6 + 0x3bd457)
#8 0x000075788b49cb84 start_thread (libc.so.6 + 0x9cb84)
#9 0x000075788b529ecc __clone3 (libc.so.6 + 0x129ecc)
ELF object binary architecture: AMD x86-64
GNU gdb (Ubuntu 15.1-1ubuntu1~24.04.1) 15.1
Copyright (C) 2024 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
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Type "show copying" and "show warranty" for details.
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Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from
/usr/lib/x86_64-linux-gnu/libexec/kf6/baloo_file_extractor...
Reading symbols from
/usr/lib/debug/.build-id/cf/6eb2c8eb02a8d84d4f8e7f81b84f09f24c0567.debug...
[New LWP 6684]
[New LWP 6689]
This GDB supports auto-downloading debuginfo from the following URLs:
<https://debuginfod.neon.kde.org/>
<https://debuginfod.ubuntu.com/>
Enable debuginfod for this session? (y or [n]) n
Debuginfod has been disabled.
To make this setting permanent, add 'set debuginfod enabled off' to .gdbinit.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by
`/usr/lib/x86_64-linux-gnu/libexec/kf6/baloo_file_extractor'.
Program terminated with signal SIGABRT, Aborted.
#0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>)
at ./nptl/pthread_kill.c:44
warning: 44 ./nptl/pthread_kill.c: No such file or directory
[Current thread is 1 (Thread 0x75788ac0de40 (LWP 6684))]
(gdb) bt
#0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>)
at ./nptl/pthread_kill.c:44
#1 __pthread_kill_internal (signo=6, threadid=<optimized out>) at
./nptl/pthread_kill.c:78
#2 __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at
./nptl/pthread_kill.c:89
#3 0x000075788b44527e in __GI_raise (sig=sig@entry=6) at
../sysdeps/posix/raise.c:26
#4 0x000075788b4288ff in __GI_abort () at ./stdlib/abort.c:79
#5 0x000075788c14f7a1 in qAbort () at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/corelib/global/qassert.cpp:47
#6 qt_maybe_message_fatal<QString&> (message=..., context=...,
msgType=QtFatalMsg) at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/corelib/global/qlogging.cpp:2170
#7 qt_message(QtMsgType, const QMessageLogContext &, const char *, typedef
__va_list_tag __va_list_tag *) (msgType=msgType@entry=QtFatalMsg, context=...,
msg=msg@entry=0x75788c625e24 "%s",
ap=ap@entry=0x7ffc2dcd7238) at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/corelib/global/qlogging.cpp:413
#8 0x000075788c15028b in QMessageLogger::fatal
(this=this@entry=0x7ffc2dcd7760, msg=msg@entry=0x75788c625e24 "%s")
at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/corelib/global/qlogging.cpp:902
#9 0x000075788c6d6b24 in init_platform (argv=<optimized out>,
argc=@0x7ffc2dcd7afc: 1, platformThemeName=..., platformPluginPath=...,
pluginNamesWithArguments=...)
at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/gui/kernel/qguiapplication.cpp:1368
#10 QGuiApplicationPrivate::createPlatformIntegration (this=0x6461525d26b0) at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/gui/kernel/qguiapplication.cpp:1616
#11 0x000075788c6d4630 in QGuiApplicationPrivate::createEventDispatcher
(this=<optimized out>) at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/gui/kernel/qguiapplication.cpp:1634
#12 0x000075788c0f6ba9 in QCoreApplicationPrivate::init
(this=this@entry=0x6461525d26b0) at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/corelib/kernel/qcoreapplication.cpp:870
#13 0x000075788c6d4730 in QGuiApplicationPrivate::init (this=0x6461525d26b0) at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/gui/kernel/qguiapplication.cpp:1667
#14 0x000075788c6d57e5 in QGuiApplication::QGuiApplication (this=<optimized
out>, argc=<optimized out>, argv=<optimized out>, this=<optimized out>,
argc=<optimized out>, argv=<optimized out>)
at
/usr/src/qt6-base-6.11.1-0zneon+24.04+noble+release+build162/src/gui/kernel/qguiapplication.h:175
#15 0x000064611ac1b476 in main (argc=<optimized out>, argv=<optimized out>) at
/usr/src/kf6-baloo-6.31.0-0zneon+24.04+noble+release+build78/src/file/extractor/main.cpp:27
```
[What I do now]
Since this can be annoying, a workaround is taken to stop the auto-crash:
1. `balooctl6 suspend` (stops the crashing for now)
1. `systemctl --user edit kde-baloo`
2. Insert content:
```systemd
[Service]
Environment="QT_QPA_PLATFORM=offscreen"
```
3. Save; Systemd reloads
4. `systemctl --user restart kde-baloo`
5. (check:) `systemctl --user show kde-baloo --property=Environment | grep
'QT_QPA_PLATFORM'` ("Environment=QT_QPA_PLATFORM=offscreen" seen in the output)
My thinking was: I don't know, but if the crashing process is a background
task, why must it `init_platform` for (maybe) Wayland? Maybe I can force it to
render whatever it's trying, off the screen. And hey, it turns out working.
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