** Description changed: + [ Impact ] + GNOME Flashback has several use-after-free bugs that may cause it to crash when the lock screen is activated. + + [ Test Plan ] + 1. Install gnome-session-flashback. + 2. Log in into GNOME Flashback (Metacity) session. + 3. Make sure the user has a password, so the screen does not unlock automatically. + 4. Leave the system idle for a few hours, so that the lock screen is activated and some time passes after that. + + Expected behavior: no crash. + + Actual behavior currently happening on some Noble systems: gnome-flashback crashes with segmentation fault, the stack trace is here: + https://bugs.launchpad.net/ubuntu/+source/gnome-flashback/+bug/2086706/comments/22 + + [ Where problems could occur ] + The fixes are mostly about disconnecting signals from dead objects. Potential regressions may be related to some functionality not working because the disconnect was wrong or happened too early. + + [ Other Info ] + The proposed fixes are copied from upstream gnome-3-52 branch, namely these commits: + - https://gitlab.gnome.org/GNOME/gnome-flashback/-/commit/981081fc7325f1bb4b987eddde8997b35f7908f4 + - https://gitlab.gnome.org/GNOME/gnome-flashback/-/commit/d0b7f431babe59d2c7daf44d88197d282d88829e + - https://gitlab.gnome.org/GNOME/gnome-flashback/-/commit/637c3d97c466ad94805a5a0c5b50de1b35c30d3c + + The same fixes are applied in 3.54.0-1ubuntu2 upload in Plucky. + + Note: ~steffel created a PPA with the same three patches applied. For + him and for ~andre-bacao this PPA helped (see comment #24), no + regressions were reported. + + -------------------------------------------------------------------------------- + Gnome flashback crashes randomly while unlock screen it prints 'ops something gone wrong...' and then must log out and login again. gnome-session-flashback version 1:3.52.1-2ubuntu1 In logs only: тра 07 15:49:02 tepl-svv gnome-flashback[5019]: double free or corruption (out) тра 07 15:49:03 tepl-svv systemd[4207]: gnome-flashback.service: Main process exited, code=dumped, status=6/ABRT тра 07 15:49:03 tepl-svv LightSideAssistant[4753]: org.gnome.ScreenSaver disappeared тра 07 15:49:03 tepl-svv systemd[4207]: gnome-flashback.service: Failed with result 'core-dump'. тра 07 15:49:03 tepl-svv systemd[4207]: gnome-flashback.service: Triggering OnFailure= dependencies. тра 07 15:49:03 tepl-svv systemd[4207]: gnome-flashback.service: Consumed 2.979s CPU time. тра 07 15:49:03 tepl-svv systemd[4207]: gnome-flashback.service: Scheduled restart job, restart counter is at 1. тра 07 15:49:03 tepl-svv systemd[4207]: Stopped target gnome-flashback.target - GNOME Flashback. тра 07 15:49:03 tepl-svv systemd[4207]: Stopping gnome-flashback.target - GNOME Flashback... тра 07 15:49:03 tepl-svv systemd[4207]: Stopped target gnome-session-x11@gnome-flashback-metacity.target - GNOME X11 Session (session: gnome-flashback-metacity). тра 07 15:49:03 tepl-svv systemd[4207]: Stopping gnome-session-x11@gnome-flashback-metacity.target - GNOME X11 Session (session: gnome-flashback-metacity)... тра 07 15:49:03 tepl-svv systemd[4207]: Stopped target gnome-session@gnome-flashback-metacity.target - GNOME Session (session: gnome-flashback-metacity). тра 07 15:49:03 tepl-svv systemd[4207]: Stopping gnome-session@gnome-flashback-metacity.target - GNOME Session (session: gnome-flashback-metacity)... тра 07 15:49:03 tepl-svv systemd[4207]: Reached target gnome-session@gnome-flashback-metacity.target - GNOME Session (session: gnome-flashback-metacity). тра 07 15:49:03 tepl-svv systemd[4207]: Reached target gnome-session-x11@gnome-flashback-metacity.target - GNOME X11 Session (session: gnome-flashback-metacity). тра 07 15:49:03 tepl-svv systemd[4207]: Starting gnome-flashback.service - GNOME Flashback... тра 07 15:49:03 tepl-svv systemd[4207]: Started gnome-session-failed.service - GNOME Session Failed lockdown screen (user). тра 07 15:49:03 tepl-svv systemd[4207]: Reached target gnome-session-failed.target - GNOME Session Failed. тра 07 15:49:03 tepl-svv gnome-flashback[10503]: Property 'libinput Accel Profiles Available' for device 'Logitech USB Optical Mouse' returned 3 items, expected 2 тра 07 15:49:03 tepl-svv gnome-flashback[10503]: Property 'libinput Accel Profile Enabled Default' for device 'Logitech USB Optical Mouse' returned 3 items, expected 2 тра 07 15:49:03 tepl-svv gnome-flashback[10503]: Property 'libinput Accel Profiles Available' for device 'GXTP5100:00 27C6:01E0 Mouse' returned 3 items, expected 2 тра 07 15:49:03 tepl-svv gnome-flashback[10503]: Property 'libinput Accel Profile Enabled Default' for device 'GXTP5100:00 27C6:01E0 Mouse' returned 3 items, expected 2 тра 07 15:49:03 tepl-svv dbus-daemon[4331]: [session uid=200463 pid=4331] Activating service name='org.freedesktop.portal.IBus' requested by ':1.124' (uid=200463 pid=10525 comm="ibus-daemon --xim --panel disable" label="unconfined") тра 07 15:49:03 tepl-svv dbus-daemon[4331]: [session uid=200463 pid=4331] Successfully activated service 'org.freedesktop.portal.IBus' тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: The XKEYBOARD keymap compiler (xkbcomp) reports: тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86CameraAccessEnable тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86CameraAccessDisable тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86CameraAccessToggle тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86NextElement тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86PreviousElement тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86AutopilotEngageToggle тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86MarkWaypoint тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86Sos тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86NavChart тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86FishingChart тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86SingleRangeRadar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86DualRangeRadar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86RadarOverlay тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86TraditionalSonar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86ClearvuSonar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86SidevuSonar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: > Warning: Could not resolve keysym XF86NavInfo тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10550]: Errors from xkbcomp are not fatal to the X server тра 07 15:49:03 tepl-svv systemd[4207]: Started gnome-flashback.service - GNOME Flashback. тра 07 15:49:03 tepl-svv systemd[4207]: Reached target gnome-flashback.target - GNOME Flashback. тра 07 15:49:03 tepl-svv gnome-flashback[5016]: Failed to grab accelerators: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Об'єкта зі шляхом «/org/gnome/Shell» не існує тра 07 15:49:03 tepl-svv gsd-media-keys[5383]: Failed to grab accelerators: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Об'єкта зі шляхом «/org/gnome/Shell» не існує тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: The XKEYBOARD keymap compiler (xkbcomp) reports: тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86CameraAccessEnable тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86CameraAccessDisable тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86CameraAccessToggle тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86NextElement тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86PreviousElement тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86AutopilotEngageToggle тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86MarkWaypoint тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86Sos тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86NavChart тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86FishingChart тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86SingleRangeRadar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86DualRangeRadar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86RadarOverlay тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86TraditionalSonar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86ClearvuSonar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86SidevuSonar тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: > Warning: Could not resolve keysym XF86NavInfo тра 07 15:49:03 tepl-svv /usr/libexec/gdm-x-session[10635]: Errors from xkbcomp are not fatal to the X server тра 07 15:49:04 tepl-svv gsd-media-keys[5383]: Failed to grab accelerator for keybinding settings:playback-random тра 07 15:49:04 tepl-svv gsd-media-keys[5383]: Failed to grab accelerator for keybinding settings:screen-brightness-cycle тра 07 15:49:04 tepl-svv gsd-media-keys[5383]: Failed to grab accelerator for keybinding settings:playback-repeat тра 07 15:49:04 tepl-svv gsd-media-keys[5383]: Failed to grab accelerator for keybinding settings:rfkill тра 07 15:49:04 tepl-svv gsd-media-keys[5383]: Failed to grab accelerator for keybinding settings:hibernate тра 07 15:49:04 tepl-svv gsd-media-keys[5383]: Failed to grab accelerator for keybinding settings:rotate-video-lock
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2065048 Title: gnome-flashback randomly crash while unlock screen dialog on ubuntu 24.04 To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-flashback/+bug/2065048/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
