Bug 218000

Summary:	rtl8139: Disallow chaining above 64K
Product:	Red Hat Enterprise Linux 5	Reporter:	Herbert Xu <herbert.xu>
Component:	xen	Assignee:	Rik van Riel <riel>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5.0	CC:	xen-maint
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	RC	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-02-08 01:10:21 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 Herbert Xu 2006-12-01 06:04:56 UTC

Changeset 12482 from xen-unstable.

[QEMU] rtl8139: Disallow chaining above 64K

As it stands the 8139C+ TX chaining is only bounded by realloc failure.
This is contrary to how the real hardware operates.  It also has DoS
potential when ioemu runs in dom0.

This patch makes any attempt to chain a frame beyond 64K fail
immediately.

Signed-off-by: Herbert Xu <herbert.org.au>

Comment 1 Jay Turner 2006-12-01 14:28:47 UTC

QE ack for RHEL5.

Comment 3 RHEL Program Management 2007-02-08 01:10:21 UTC

A package has been built which should help the problem described in 
this bug report. This report is therefore being closed with a resolution 
of CURRENTRELEASE. You may reopen this bug report if the solution does 
not work for you.