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Bug 684267

Summary:	kernel: missing CONFIG_STRICT_DEVMEM=y in S390x [rhel-6.0.z]
Product:	Red Hat Enterprise Linux 6	Reporter:	RHEL Program Management <pm-rhel>
Component:	kernel	Assignee:	Frantisek Hrbata <fhrbata>
Status:	CLOSED ERRATA	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	high	Docs Contact:
Priority:	urgent
Version:	6.1	CC:	arozansk, brueckner, bugproxy, dhoward, dtian, eteo, fhrbata, lwang, peterm, pm-eus, sbest
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	s390x
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-2.6.32-71.21.1.el6	Doc Type:	Bug Fix
Doc Text:	On IBM System z systems, user space programs could access the /dev/mem file (which contains an image of main memory), where an accidental memory (write) access could potentially be harmful. To restrict access to memory from user space through the /dev/mem file, the CONFIG_STRICT_DEVMEM configuration option has been enabled for the default kernel. The kdump and debug kernels have this option switched off by default.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-04-08 02:59:16 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:	647365
Bug Blocks:

Description RHEL Program Management 2011-03-11 16:19:14 UTC

This bug has been copied from bug #647365 and has been proposed
to be backported to 6.0 z-stream (EUS).

Comment 5 errata-xmlrpc 2011-04-08 02:59:16 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0421.html

Comment 6 Martin Prpič 2011-04-12 12:49:05 UTC

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
On IBM System z systems, user space programs could access the /dev/mem file (which contains an image of main memory), where an accidental memory (write) access could potentially be harmful. To restrict access to memory from user space through the /dev/mem file, the CONFIG_STRICT_DEVMEM configuration option has been enabled for the default kernel. The kdump and debug kernels have this option switched off by default.