Public bug reported:
1) lsb_release -rd:
Description: Ubuntu Kylin 26.04
2) apt-cache policy pkgname:
Package: libkysdk-system (3.0.1.2-0ubuntu1)
3) What you expected to happen:
The `/usr/bin/bluetoothService` should start normally during system boot
without any errors, allowing the system to provide standard Bluetooth
functionality.
4) What happened instead:
Immediately after system startup, `/usr/bin/bluetoothService` (provided by
`ukui-bluetooth`) crashes and generates a coredump.
According to the stack trace, the segmentation fault occurs in the D-Bus
message handling (`dbus_message_iter_recurse` in `libdbus-1.so.3`), which is
triggered by a call to `kdk_system_get_eUser` from `libkysysinfo.so.3` (part of
the `libkysdk-system` package) during initialization.
==============================================
SRU JUSTIFICATION
==============================================
[Impact]
On Ubuntu Kylin 26.04, the crash of `/usr/bin/bluetoothService` renders
Bluetooth services completely unavailable upon login. The root cause is within
the `libkysdk-system` package, specifically in how `kdk_system_get_eUser`
handles D-Bus interactions. Updating `libkysdk-system` resolves the underlying
D-Bus crash and restores Bluetooth functionality for the user.
[Test Plan]
1. Boot a standard Ubuntu Kylin 26.04 system.
2. Check the status of the Bluetooth service: `systemctl status
bluetoothService`
3. Observe that the service fails and a crash file is generated in
`/var/crash/`.
4. Enable the proposed repository and upgrade the `libkysdk-system` package to
the patched version.
5. Reboot the system.
6. Verify that `/usr/bin/bluetoothService` is now in an 'active (running)'
state.
7. Confirm that no new coredumps are generated in `/var/crash/`.
[Where problems could occur]
`libkysdk-system` (specifically `libkysysinfo.so.3`) is a foundational SDK
library used by various UKUI desktop components. The fix modifies the internal
D-Bus handling within `kdk_system_get_eUser`. If the fix introduces logic
errors, it could impact other UKUI components (like the panel or sidebar) that
query current user information, potentially causing them to fail or crash.
Regression testing will include verifying general desktop login and UKUI panel
stability to ensure they continue functioning properly alongside the restored
Bluetooth service.
** Affects: libkysdk-system (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
1) lsb_release -rd:
Description: Ubuntu Kylin 26.04
2) apt-cache policy pkgname:
- Package: libkysdk-system (Current version in Ubuntu Kylin 26.04)
+ Package: libkysdk-system (3.0.1.2-0ubuntu1)
3) What you expected to happen:
The `/usr/bin/bluetoothService` should start normally during system boot
without any errors, allowing the system to provide standard Bluetooth
functionality.
4) What happened instead:
- Immediately after system startup, `/usr/bin/bluetoothService` (provided by
`ukui-bluetooth`) crashes and generates a coredump.
+ Immediately after system startup, `/usr/bin/bluetoothService` (provided by
`ukui-bluetooth`) crashes and generates a coredump.
According to the stack trace, the segmentation fault occurs in the D-Bus
message handling (`dbus_message_iter_recurse` in `libdbus-1.so.3`), which is
triggered by a call to `kdk_system_get_eUser` from `libkysysinfo.so.3` (part of
the `libkysdk-system` package) during initialization.
==============================================
SRU JUSTIFICATION
==============================================
[Impact]
On Ubuntu Kylin 26.04, the crash of `/usr/bin/bluetoothService` renders
Bluetooth services completely unavailable upon login. The root cause is within
the `libkysdk-system` package, specifically in how `kdk_system_get_eUser`
handles D-Bus interactions. Updating `libkysdk-system` resolves the underlying
D-Bus crash and restores Bluetooth functionality for the user.
[Test Plan]
1. Boot a standard Ubuntu Kylin 26.04 system.
2. Check the status of the Bluetooth service: `systemctl status
bluetoothService`
3. Observe that the service fails and a crash file is generated in
`/var/crash/`.
4. Enable the proposed repository and upgrade the `libkysdk-system` package
to the patched version.
5. Reboot the system.
6. Verify that `/usr/bin/bluetoothService` is now in an 'active (running)'
state.
7. Confirm that no new coredumps are generated in `/var/crash/`.
[Where problems could occur]
`libkysdk-system` (specifically `libkysysinfo.so.3`) is a foundational SDK
library used by various UKUI desktop components. The fix modifies the internal
D-Bus handling within `kdk_system_get_eUser`. If the fix introduces logic
errors, it could impact other UKUI components (like the panel or sidebar) that
query current user information, potentially causing them to fail or crash.
Regression testing will include verifying general desktop login and UKUI panel
stability to ensure they continue functioning properly alongside the restored
Bluetooth service.
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2151287
Title:
[SRU] /usr/bin/bluetoothService crashes in kdk_system_get_eUser during
startup
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libkysdk-system/+bug/2151287/+subscriptions
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