Bug 168703

Summary:	sshd/X11 does not tunnel iff command placed in background
Product:	[Fedora] Fedora	Reporter:	jørgen nørgaard <jnp>
Component:	openssh	Assignee:	Tomas Mraz <tmraz>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4
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:	2006-01-23 17:07:55 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 jørgen nørgaard 2005-09-19 17:01:13 UTC

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/412.7 (KHTML, like Gecko) Safari/412.5

Description of problem:
After the most recent up2date, I have a problem with x11 tunnelling over ssh.


If I login using:

ssh -C -Y <key file> -f "$user@$host" "xterm &"

I get the following error:

xterm Xt error: Can't open display: localhost:12.0

If logged in as:
ssh -C -Y <key file> -f "$user@$host" "xterm"

It works.

Backgrounding the login job is to get around limitations in older openssh versions on other systems.



This did not happen before the latest up2date. I run up2date from a terminal started this way and 
afterwards it fails.



Version-Release number of selected component (if applicable):
openssh-4.2p1-fc4.1

How reproducible:
Always

Steps to Reproduce:
1. hard to describe, see above
2.
3.
  

Additional info:

Comment 1 John Mahowald 2005-09-19 17:05:34 UTC

*** Bug 168704 has been marked as a duplicate of this bug. ***

Comment 2 Tomas Mraz 2005-09-19 20:35:12 UTC

I can't reproduce this problem here. The upgrade happened on server or client or
both? Could you please attach logs from both client and server (sshd run with
-ddd ssh with -vvv)?

Comment 3 Tomas Mraz 2005-09-19 21:06:59 UTC

I found a better reproducer:

ssh -Y user@host "(sleep 2; xterm) &"

The code handling setup of X forwarding channels was changed between openssh
4.1p1 and 4.2p1. I'll report this upstream.

Comment 4 Fedora Update System 2006-01-23 17:05:11 UTC

From User-Agent: XML-RPC

openssh-4.2p1-fc4.10 has been pushed for FC4, which should resolve this issue.  If these problems are still present in this version, then please make note of it in this bug report.