Created attachment 138684 [details] Dolphin crashdump after meeting single "/" tag SUMMARY: Dolphin crashes when encountering a tag containing just a single slash STEPS TO REPRODUCE: Create a testfile and create, with Assign Tags, a tag with just "/" in it. Confirm the tag has been written "as given" with getfattr: getfattr -d testfile.txt # file: testfile.txt user.xdg.tags="/" Enable the Information Panel (with F11) and move to highlight the file... OBSERVED RESULTS Dolphin crashes ... Hopefully with a usable crashdump (attached) EXPECTED RESULTS "Assign Tag" should not accept a single "/" as a tag if typed in. The Information Panel "edit tag" seems to do this. The Information Panel should also be proof against weird tags as it might meet just *anything* SOFTWARE/OS VERSIONS Checked on Neon Unstable... Plasma: 5.22.80 Frameworks: 5.83.0 Qt: 5.15.2 ADDITIONAL INFORMATION If you restart Dolphin it tries to restore its state - and crashes again immediately. There are other instances, less dramatic, cf: Bug 433990 and Bug 437494 [Hunting for source of Bug 437176]
Able to reproduce this. It crashes only when "Information Panel" (F11) is opened and file with "/" tag is selected or shown in the panel. Operating System: Arch Linux KDE Plasma Version: 6.1.5 KDE Frameworks Version: 6.5.0 Qt Version: 6.7.2 Kernel Version: 6.10.7-arch1-1 (64-bit) Graphics Platform: Wayland Terminal gives me: KCrash: Application 'dolphin' crashing... crashRecursionCounter = 2 fish: Job 1, 'dolphin' terminated by signal SIGSEGV (Address boundary error) DEBUG INFO BELOW: PID: 8987 (dolphin) UID: 1000 (user) GID: 987 (users) Signal: 11 (SEGV) Timestamp: Tue 2024-09-17 16:55:23 UTC (10s ago) Command Line: dolphin Executable: /usr/bin/dolphin Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-org.kde.konsole@4ce661d46c37491cbf1dc68d55cd6bfd.service Unit: user@1000.service User Unit: app-org.kde.konsole@4ce661d46c37491cbf1dc68d55cd6bfd.service Slice: user-1000.slice Owner UID: 1000 (user) Boot ID: c38f0d017ed749f898654a7b3bbfb1de Machine ID: 24156967181b4b6a9b04902cfa7b2008 Hostname: Work-PC Storage: /var/lib/systemd/coredump/core.dolphin.1000.c38f0d017ed749f898654a7b3bbfb1de.8987.1726592123000000.zst (present) Size on Disk: 7M Message: Process 8987 (dolphin) of user 1000 dumped core. Stack trace of thread 8987: #0 0x000072b2556a53f4 n/a (libc.so.6 + 0x963f4) #1 0x000072b25564c120 raise (libc.so.6 + 0x3d120) #2 0x000072b25735c711 _ZN6KCrash19defaultCrashHandlerEi (libKF6Crash.so.6 + 0x6711) #3 0x000072b25564c1d0 n/a (libc.so.6 + 0x3d1d0) #4 0x000072b2574ec4a4 n/a (libKF6BalooWidgets.so.6 + 0x124a4) #5 0x000072b25750939d n/a (libKF6BalooWidgets.so.6 + 0x2f39d) #6 0x000072b257503c6c n/a (libKF6BalooWidgets.so.6 + 0x29c6c) #7 0x000072b2551a3397 n/a (libQt6Core.so.6 + 0x1a3397) #8 0x000072b2574f2e65 n/a (libKF6BalooWidgets.so.6 + 0x18e65) #9 0x000072b2551a3397 n/a (libQt6Core.so.6 + 0x1a3397) #10 0x000072b256ef3784 _ZN4KJob8finishedEPS_NS_14QPrivateSignalE (libKF6CoreAddons.so.6 + 0x67784) #11 0x000072b256efb026 n/a (libKF6CoreAddons.so.6 + 0x6f026) #12 0x000072b25518d89f _ZN7QObject5eventEP6QEvent (libQt6Core.so.6 + 0x18d89f) #13 0x000072b2562fc8cc _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt6Widgets.so.6 + 0xfc8cc) #14 0x000072b255145aa8 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt6Core.so.6 + 0x145aa8) #15 0x000072b255145e6b _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData (libQt6Core.so.6 + 0x145e6b) #16 0x000072b2553aa00c n/a (libQt6Core.so.6 + 0x3aa00c) #17 0x000072b25230e299 n/a (libglib-2.0.so.0 + 0x5d299) #18 0x000072b252370ec7 n/a (libglib-2.0.so.0 + 0xbfec7) #19 0x000072b25230d795 g_main_context_iteration (libglib-2.0.so.0 + 0x5c795) #20 0x000072b2553a82bd _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3a82bd) #21 0x000072b25514ff66 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x14ff66) #22 0x000072b25514a11d _ZN16QCoreApplication4execEv (libQt6Core.so.6 + 0x14a11d) #23 0x0000617b7d06d5a4 n/a (dolphin + 0x475a4) #24 0x000072b255634e08 n/a (libc.so.6 + 0x25e08) #25 0x000072b255634ecc __libc_start_main (libc.so.6 + 0x25ecc) #26 0x0000617b7d06ebe5 n/a (dolphin + 0x48be5) Stack trace of thread 8990: #0 0x000072b25571a63d __poll (libc.so.6 + 0x10b63d) #1 0x000072b251711257 n/a (libQt6WaylandClient.so.6 + 0x60257) #2 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #3 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #4 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 9000: #0 0x000072b25571abb0 ppoll (libc.so.6 + 0x10bbb0) #1 0x000072b2552bccb3 _Z12qt_safe_pollP6pollfdm14QDeadlineTimer (libQt6Core.so.6 + 0x2bccb3) #2 0x000072b254557e73 n/a (libQt6Network.so.6 + 0x11ce73) #3 0x000072b2544ddc39 n/a (libQt6Network.so.6 + 0xa2c39) #4 0x000072b2544dac5e _ZN15QAbstractSocket16waitForReadyReadEi (libQt6Network.so.6 + 0x9fc5e) #5 0x000072b2573a0e9a n/a (libKF6KIOCore.so.6 + 0x3de9a) #6 0x000072b2574898fd n/a (libKF6KIOCore.so.6 + 0x1268fd) #7 0x000072b257465524 n/a (libKF6KIOCore.so.6 + 0x102524) #8 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #9 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #10 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 9003: #0 0x000072b25569fa19 n/a (libc.so.6 + 0x90a19) #1 0x000072b2556a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2) #2 0x000072b2552d1bf8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2d1bf8) #3 0x000072b2552cb852 n/a (libQt6Core.so.6 + 0x2cb852) #4 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #5 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #6 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 8994: #0 0x000072b25569fa19 n/a (libc.so.6 + 0x90a19) #1 0x000072b2556a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2) #2 0x000072b2552d1bf8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2d1bf8) #3 0x000072b2552cb852 n/a (libQt6Core.so.6 + 0x2cb852) #4 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #5 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #6 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 8996: #0 0x000072b25571a63d __poll (libc.so.6 + 0x10b63d) #1 0x000072b252370e0d n/a (libglib-2.0.so.0 + 0xbfe0d) #2 0x000072b25230d795 g_main_context_iteration (libglib-2.0.so.0 + 0x5c795) #3 0x000072b2553a82bd _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3a82bd) #4 0x000072b25514ff66 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x14ff66) #5 0x000072b25523d7a0 _ZN7QThread3runEv (libQt6Core.so.6 + 0x23d7a0) #6 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #7 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #8 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 8988: #0 0x000072b25571a63d __poll (libc.so.6 + 0x10b63d) #1 0x000072b252370e0d n/a (libglib-2.0.so.0 + 0xbfe0d) #2 0x000072b25230d795 g_main_context_iteration (libglib-2.0.so.0 + 0x5c795) #3 0x000072b2553a82bd _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3a82bd) #4 0x000072b25514ff66 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x14ff66) #5 0x000072b25523d650 _ZN7QThread4execEv (libQt6Core.so.6 + 0x23d650) #6 0x000072b256a4ff0e n/a (libQt6DBus.so.6 + 0x2df0e) #7 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #8 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #9 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 8989: #0 0x000072b25569fa19 n/a (libc.so.6 + 0x90a19) #1 0x000072b2556a2479 pthread_cond_wait (libc.so.6 + 0x93479) #2 0x000072b2552d1c60 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2d1c60) #3 0x000072b2517111ef n/a (libQt6WaylandClient.so.6 + 0x601ef) #4 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #5 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #6 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 9010: #0 0x000072b25571abb0 ppoll (libc.so.6 + 0x10bbb0) #1 0x000072b2552bccb3 _Z12qt_safe_pollP6pollfdm14QDeadlineTimer (libQt6Core.so.6 + 0x2bccb3) #2 0x000072b254557e73 n/a (libQt6Network.so.6 + 0x11ce73) #3 0x000072b2544ddc39 n/a (libQt6Network.so.6 + 0xa2c39) #4 0x000072b2544dac5e _ZN15QAbstractSocket16waitForReadyReadEi (libQt6Network.so.6 + 0x9fc5e) #5 0x000072b2573a0e9a n/a (libKF6KIOCore.so.6 + 0x3de9a) #6 0x000072b2574898fd n/a (libKF6KIOCore.so.6 + 0x1268fd) #7 0x000072b257465524 n/a (libKF6KIOCore.so.6 + 0x102524) #8 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #9 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #10 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 9014: #0 0x000072b25571abb0 ppoll (libc.so.6 + 0x10bbb0) #1 0x000072b2552bccb3 _Z12qt_safe_pollP6pollfdm14QDeadlineTimer (libQt6Core.so.6 + 0x2bccb3) #2 0x000072b254557e73 n/a (libQt6Network.so.6 + 0x11ce73) #3 0x000072b2544ddc39 n/a (libQt6Network.so.6 + 0xa2c39) #4 0x000072b2544dac5e _ZN15QAbstractSocket16waitForReadyReadEi (libQt6Network.so.6 + 0x9fc5e) #5 0x000072b2573a0e9a n/a (libKF6KIOCore.so.6 + 0x3de9a) #6 0x000072b2574898fd n/a (libKF6KIOCore.so.6 + 0x1268fd) #7 0x000072b257465524 n/a (libKF6KIOCore.so.6 + 0x102524) #8 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #9 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #10 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 8993: #0 0x000072b25569fa19 n/a (libc.so.6 + 0x90a19) #1 0x000072b2556a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2) #2 0x000072b2552d1bf8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2d1bf8) #3 0x000072b2552cb852 n/a (libQt6Core.so.6 + 0x2cb852) #4 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #5 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #6 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 9007: #0 0x000072b25571abb0 ppoll (libc.so.6 + 0x10bbb0) #1 0x000072b2552bccb3 _Z12qt_safe_pollP6pollfdm14QDeadlineTimer (libQt6Core.so.6 + 0x2bccb3) #2 0x000072b254557e73 n/a (libQt6Network.so.6 + 0x11ce73) #3 0x000072b2544ddc39 n/a (libQt6Network.so.6 + 0xa2c39) #4 0x000072b2544dac5e _ZN15QAbstractSocket16waitForReadyReadEi (libQt6Network.so.6 + 0x9fc5e) #5 0x000072b2573a0e9a n/a (libKF6KIOCore.so.6 + 0x3de9a) #6 0x000072b2574898fd n/a (libKF6KIOCore.so.6 + 0x1268fd) #7 0x000072b257465524 n/a (libKF6KIOCore.so.6 + 0x102524) #8 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #9 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #10 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 8995: #0 0x000072b25569fa19 n/a (libc.so.6 + 0x90a19) #1 0x000072b2556a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2) #2 0x000072b2552d1bf8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2d1bf8) #3 0x000072b2552cb852 n/a (libQt6Core.so.6 + 0x2cb852) #4 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #5 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #6 0x000072b25572849c n/a (libc.so.6 + 0x11949c) Stack trace of thread 9013: #0 0x000072b25571abb0 ppoll (libc.so.6 + 0x10bbb0) #1 0x000072b2552bccb3 _Z12qt_safe_pollP6pollfdm14QDeadlineTimer (libQt6Core.so.6 + 0x2bccb3) #2 0x000072b254557e73 n/a (libQt6Network.so.6 + 0x11ce73) #3 0x000072b2544ddc39 n/a (libQt6Network.so.6 + 0xa2c39) #4 0x000072b2544dac5e _ZN15QAbstractSocket16waitForReadyReadEi (libQt6Network.so.6 + 0x9fc5e) #5 0x000072b2573a0e9a n/a (libKF6KIOCore.so.6 + 0x3de9a) #6 0x000072b2574898fd n/a (libKF6KIOCore.so.6 + 0x1268fd) #7 0x000072b257465524 n/a (libKF6KIOCore.so.6 + 0x102524) #8 0x000072b2552cd237 n/a (libQt6Core.so.6 + 0x2cd237) #9 0x000072b2556a339d n/a (libc.so.6 + 0x9439d) #10 0x000072b25572849c n/a (libc.so.6 + 0x11949c) ELF object binary architecture: AMD x86-64
I have reproduced the problem and tried to fix it.
A possibly relevant merge request was started @ https://invent.kde.org/libraries/baloo-widgets/-/merge_requests/94
Git commit 985e7d9cdc3270c5f8660657c4c53f51a7a57377 by Méven Car, on behalf of yu shuoqi. Committed on 07/11/2025 at 10:51. Pushed by meven into branch 'master'. TagCheckBox: Handle dolphin crashes when encountering a tag containing slash '/' character Use KEditTagsDialog so the user can create and select hierarchical tags FIXED-IN: 25.08 M +4 -2 src/kedittagsdialog.cpp M +3 -1 src/kedittagsdialog_p.h M +1 -0 src/tagsfileitemactionplugin/CMakeLists.txt M +13 -7 src/tagsfileitemactionplugin/tagsfileitemaction.cpp https://invent.kde.org/libraries/baloo-widgets/-/commit/985e7d9cdc3270c5f8660657c4c53f51a7a57377
I'm going to reopen this, not because the patch doesn't work but that there are more gaps that need fixing... Looking at Neon Unstable, leading "/" are ignored when you open the F11, information, panel and add a tag to a file. You can give a "/" as a tag and it is not written to the extended attributes. It is still possible to add a "/" tag to a file if you use the drop down context menu for the file and click on "Assign Tags > "Create New". You can assign a "/" tag and it will be written the xattr. If you have a file with a "/" tag, have the F11, information, panel open and move the cursor over the file to highlight it, Dolphin crashes.
Created attachment 186656 [details] Dolphin crashdump after meeting single "/" tag (2025-11-09) Crash on Neon Unstable - revisited.