Bug 427873

Summary:	Checksum offloading and IP connection tracking don't play well together
Product:	Red Hat Enterprise Linux 5	Reporter:	Don Dutile (Red Hat) <ddutile>
Component:	kernel-xen	Assignee:	Don Dutile (Red Hat) <ddutile>
Status:	CLOSED NOTABUG	QA Contact:	Martin Jenner <mjenner>
Severity:	low	Docs Contact:
Priority:	low
Version:	5.1	CC:	xen-maint
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-02-27 05:13:00 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:	414131
Bug Blocks:

Description Don Dutile (Red Hat) 2008-01-07 23:11:29 UTC

+++ This bug was initially created as a clone of Bug #414131 +++

With the 2.6.9-67.EL xenU kernel I am unable to ssh into the guest if the
firewall is enabled. I have confirmed that SSH is being allowed through by the
firewall. sshd forks a new process to recieve the connection but this then waits
forever for more data.

If I "service iptables stop" within the guest then all works OK. 

I believe this is fixed by
http://hg.uk.xensource.com/xen-unstable.hg?cs=36d020268c6c

-- Additional comment from ijc.uk on 2007-12-06 10:33 EST --
Created an attachment (id=279791)
backported version of 157:36d020268c6c

I had to munge 157:36d020268c6c to get it to apply, the version I ended up with
is attached.

Alternatively there are a handful of prior patches that rework the GSO vs. TSO
setup in netfront.c which you could pull in that would probably make 157 apply
ok.

-- Additional comment from ddutile on 2008-01-07 18:01 EST --
This only fails if ssh'ing from another (any) domU to the 2.6.9-67.EL xenU/domU
on the same local machine.
ssh-ing from dom0 works; ssh-ing from another remote machine works also.

Comment 1 Chris Lalancette 2008-02-27 04:27:01 UTC

Don,
     I think you mentioned that this ended up being just a bug in the RHEL-4 PV
kernel, and not in the RHEL-5 PV kernel.  Assuming that is the case, can you
close this bug out?

Thanks,
Chris Lalancette

Comment 2 Don Dutile (Red Hat) 2008-02-27 05:13:00 UTC

Correct, it's only in rhel4-xenU.
thought I closed this bz.... will do so now...