Bug 474660

Summary:	[LTC 5.5 FEAT] Enhanced Linux System Layout for System z [200855]
Product:	Red Hat Enterprise Linux 5	Reporter:	IBM Bug Proxy <bugproxy>
Component:	kernel	Assignee:	Red Hat Kernel Manager <kernel-mgr>
Status:	CLOSED DEFERRED	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	high	Docs Contact:
Priority:	high
Version:	5.5	CC:	hpicht, jjarvis
Target Milestone:	alpha	Keywords:	FutureFeature, OtherQA, Reopened
Target Release:	---
Hardware:	s390x
OS:	All
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-03-25 16:45:25 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:	481160

Description IBM Bug Proxy 2008-12-04 19:30:34 UTC

=Comment: #0=================================================
Emily J. Ratliff <ratliff.com> - 
1. Feature Overview:
Feature Id:	[200855]
a. Name of Feature:	Linux on System z: Enhanced Linux System Layout
b. Feature Description
Execute the user program in secondary space mode (executable comes through primary space while data
is accessed through the secondary space). Add a second paging table for data access. This enables
the kernel to map executable code to primary space only. The kernel itself will operate in home
space mode.

2. Feature Details:
Sponsor:	zSeries
Architectures:
s390x

Arch Specificity: Both
Affects Core Kernel: Yes
Delivery Mechanism: Backport
Category:	Kernel
Request Type:	Kernel - Enhancement from IBM
d. Upstream Acceptance:	Accepted
Sponsor Priority	1
f. Severity: High
IBM Confidential:	no
Code Contribution:	IBM code
g. Component Version Target:	2.6.21

3. Business Case
Enhanced Security: protection against buffer overwrite exploits.

Benefits
The item introduces a secure Linux system that is protected against stack overwrites, e.g.
delivering a system that is insensitive against buffer exploits (security!).

4. Primary contact at Red Hat: 
John Jarvis
jjarvis

5. Primary contacts at Partner:
Project Management Contact:
Hans-Georg Markgraf, mgrf.com, Boeblingen 49-7031-16-3978

Technical contact(s):
Gonzalo Muelas Serrano, gmuelas.com

IBM Manager:
Thomas Schwarz, t.schwarz.com

Comment 1 John Jarvis 2008-12-22 22:52:21 UTC

IBM is signed up to test and provide feedback.

Comment 2 IBM Bug Proxy 2009-01-22 08:32:24 UTC

As discussed in yesterdays call, this feature request need to be deferred to RHEL 5.5.
John plans to open a RHEL 5.5 Tracker BZ and connect that to this feature BZ to use this request for RHEL 5.5

I set this to defer for now, to re-open for RHEL 5.5 feature submission

Comment 3 John Jarvis 2009-03-25 16:45:25 UTC

Closing as DEFERRED based on comment 2

Comment 4 IBM Bug Proxy 2009-08-03 11:00:32 UTC

------- Comment From mgrf.com 2009-08-03 06:58 EDT-------
IBM not pursue this with RHEL 5 stream.
Closing feature request