Bug 198930

Summary:	Xnest segfaults
Product:	[Fedora] Fedora	Reporter:	Tom London <selinux>
Component:	xorg-x11-server	Assignee:	X/OpenGL Maintenance List <xgl-maint>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-07-27 00:23:52 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	150223

Description Tom London 2006-07-14 19:45:59 UTC

Description of problem:
Running 'Xnest -ac -noreset :5' under gnome/gdm segfaults.

Here is the output from 'gdb Xnest':
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208854112 (LWP 4287)]
0x082bd00b in PictureDestroyWindow ()
(gdb) where
#0  0x082bd00b in PictureDestroyWindow ()
#1  0x082cdee4 in SDamageNotifyEvent ()
#2  0x082cd4c5 in SDamageNotifyEvent ()
#3  0x082c8a36 in SDamageNotifyEvent ()
#4  0x080853fa in NotImplemented ()
#5  0x0012a214 in __libc_start_main () from /lib/libc.so.6
#6  0x0805d3a1 in ?? ()
(gdb) 


Version-Release number of selected component (if applicable):
xorg-x11-server-Xnest-1.1.1-5.fc6


How reproducible:
Every time

Steps to Reproduce:
1. install Xnest
2. 'Xnest -ac -noreset :5'
3.
  
Actual results:


Expected results:


Additional info:

Comment 1 Adam Jackson 2006-07-16 02:22:32 UTC

This appears to be a side effect of switching on Composite by default; since
Xnest lacks Render support, and Composite requires it, things blow up quite nicely.

I have a partial fix based on what I proposed in upstream Xorg bugzilla, but it
doesn't work quite right yet.

Comment 2 Tom London 2006-07-19 21:11:08 UTC

Still segfaults with xorg-x11-server-Xnest-1.1.1-6.fc6

Comment 3 Tom London 2006-07-24 13:48:15 UTC

Still segfaults with xorg-x11-server-Xnest-1.1.1-8.fc6

Comment 4 Adam Jackson 2006-07-27 00:23:42 UTC

Should be fixed now in xorg-x11-server-Xnest 1.1.1-11.fc6 or later.

Comment 5 Adam Jackson 2006-07-27 00:23:52 UTC

Should be fixed now in xorg-x11-server-Xnest 1.1.1-11.fc6 or later.