Bug 807116

Summary:	KiCad triggers crash in unaccelerated X server line drawing code
Product:	[Fedora] Fedora	Reporter:	Mitch Davis <mjd+redhat>
Component:	xorg-x11-server	Assignee:	X/OpenGL Maintenance List <xgl-maint>
Status:	CLOSED WONTFIX	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	16	CC:	xgl-maint
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-02-26 15:16:34 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:

Description Mitch Davis 2012-03-27 04:40:18 UTC

Description of problem:

Using Kicad's "fill zones" with an unaccelerated X server crashes the server.

Version of X: xorg-x11-server-Xorg-1.11.4-2.fc16

Steps to Reproduce:
1. Right click on zone boundary
2. Choose Zone -> Fill zone
3. X server crashes

Doesn't happen every time, and may depend on the shape of zones.

What's happening is that a call is being made to XDrawLine with parameters which kill the unaccelerated Bresenham line drawing algorithm.  The bug was already reported here:

  https://bugs.freedesktop.org/show_bug.cgi?id=24274

That bug report also has a patch to fix the problem.  I have been running xorg-x11-server-Xorg-1.11.4-2.fc16 with that patch applied, and there have been no further crashes, nor can I see any line drawing problems.

It should not be possible to crash the X server under any circumstance.  I would suggest including this patch in the build for xorg-x11-server-Xorg as soon as possible.

Comment 1 Fedora End Of Life 2013-01-16 21:04:03 UTC

This message is a reminder that Fedora 16 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
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bug reports from releases that are no longer maintained. At that time
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Comment 2 Fedora End Of Life 2013-02-26 15:16:36 UTC

Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.