Bug 1288875

Created attachment 1102864 [details]
File: backtrace

Created attachment 1102865 [details]
File: cgroup

Created attachment 1102866 [details]
File: core_backtrace

Created attachment 1102867 [details]
File: dso_list

Created attachment 1102868 [details]
File: environ

Created attachment 1102869 [details]
File: exploitable

Created attachment 1102870 [details]
File: limits

Created attachment 1102871 [details]
File: maps

Created attachment 1102872 [details]
File: mountinfo

Created attachment 1102873 [details]
File: namespaces

Created attachment 1102874 [details]
File: open_fds

Created attachment 1102875 [details]
File: proc_pid_status

Created attachment 1102876 [details]
File: var_log_messages

*** Bug 1302569 has been marked as a duplicate of this bug. ***

*** Bug 1298287 has been marked as a duplicate of this bug. ***

This bug is still present in Gnome 3.20.

Similar problem has been detected:

Happened during Drand and Drop

reporter:       libreport-2.7.2
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: meta_xwayland_selection_handle_xfixes_selection_notify
executable:     /usr/bin/gnome-shell
global_pid:     28371
kernel:         4.7.0-2.fc26.x86_64
package:        gnome-shell-3.21.4-1.fc25
pkg_vendor:     Fedora Project
reason:         gnome-shell killed by SIGSEGV
runlevel:       N 5
type:           CCpp
uid:            16025

Looks like this might still be an issue. Can focus be NULL in this code ?

      if (event->owner != None && event->owner != selection->window)
        {
          MetaWaylandSurface *focus;

          focus = compositor->seat->pointer.focus_surface;
          selection->source = meta_wayland_data_source_xwayland_new (selection);
          meta_wayland_data_device_set_dnd_source (&compositor->seat->data_device,
                                                   selection->source);

          meta_wayland_data_device_start_drag (data_device,
                                               wl_resource_get_client (focus->resource),
                                               &drag_xgrab_interface,
                                               focus, selection->source,
                                               NULL);
        }

Possible fix (upstream): https://bugzilla.gnome.org/show_bug.cgi?id=770940

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Not sure if it was resolved, but at minimum, I spotted it with f25 package previously ...

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bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
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of Fedora, you are encouraged  change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.

This has been fixed upstream.

Fedora 25 changed to end-of-life (EOL) status on 2017-12-12. Fedora 25 is
no longer maintained, which means that it will not receive any further
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