vino-server crashed with SIGSEGV in _XSend()

[Nico Jabin]

Following upgrade from 17.04 (Gnome) to 17.10.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: vino 3.8.1-0ubuntu12
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CrashCounter: 1
CurrentDesktop: GNOME
Date: Wed Oct 18 12:59:52 2017
ExecutablePath: /usr/lib/vino/vino-server
InstallationDate: Installed on 2017-04-17 (183 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412)
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
ProcCmdline: /usr/lib/vino/vino-server
ProcEnviron:
 LANG=en_GB.UTF-8
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
SegvAnalysis:
 Segfault happened at: 0x7f2a587b63ce <_XSend+126>: mov (%rax),%rdx
 PC (0x7f2a587b63ce) ok
 source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: vino
StacktraceTop:
 _XSend () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 XQueryExtension () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libXtst.so.6
 XTestQueryExtension () from /usr/lib/x86_64-linux-gnu/libXtst.so.6
 ?? ()
Title: vino-server crashed with SIGSEGV in _XSend()
UpgradeStatus: Upgraded to artful on 2017-10-18 (0 days ago)
UserGroups: sudo

[Apport retracing service (apport)]

StacktraceTop:
 _XSend (dpy=dpy@entry=0x558127139100, data=data@entry=0x7f2a58576f30 "XInputExtension", size=15) at ../../src/xcb_io.c:447
 XQueryExtension (dpy=dpy@entry=0x558127139100, name=name@entry=0x7f2a58576f30 "XInputExtension", major_opcode=major_opcode@entry=0x7ffe5c2962fc, first_event=first_event@entry=0x7ffe5c296300, first_error=first_error@entry=0x7ffe5c296304) at ../../src/QuExt.c:47
 get_xinput_base (dpy=0x558127139100) at ../../src/XTest.c:79
 find_display (dpy=0x558127139100) at ../../src/XTest.c:83
 XTestQueryExtension (dpy=dpy@entry=0x558127139100, event_base_return=event_base_return@entry=0x7ffe5c2963ac, error_base_return=error_base_return@entry=0x7ffe5c2963ac, major_return=major_return@entry=0x7ffe5c2963ac, minor_return=minor_return@entry=0x7ffe5c2963ac) at ../../src/XTest.c:101

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:
* Is this reproducible?
* If so, what specific steps should we take to recreate this bug?

This will help us to find and resolve the problem.

[Sebastien Bacher (seb128)]

vino doesn't work under wayland and should try to start in that session, did you try to start it manually?

[Mark (1aunchpad-nct)]

When will this fix be completed in Ubuntu. I am running 18.04 and, because of this bug, can't use screen sharing when using Wayland.

[Julien ROBIN (julien-robin28)]

Hi,
Using chromium for doing a fast.com speedtest, while the test is running, clicking with the left button anywhere outside the chromium window and you will get the crash.
Sometimes just visiting fast.com, typing enter, same with speedtest.net

I'm using vino on a NVIDIA Geforce GTX 950 with last version of RealVNC Viewer as client, and headless configuration using "edid.bin" file and xorg.conf file.