Bug 664364 – [6.0] System reset when changing EFI variable on large memory system

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 664364 - [6.0] System reset when changing EFI variable on large memory system

Summary:	[6.0] System reset when changing EFI variable on large memory system

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	6.0
Hardware:	x86_64 Linux

Priority	high Severity high
Target Milestone:	rc
Target Release:	---
Assigned To:	Takao Indoh
QA Contact:	Red Hat Kernel QE team
Docs Contact:

URL:
Whiteboard:
Keywords:	OtherQA, ZStream

Depends On:
Blocks:	670850
	Show dependency tree / graph

Reported:	2010-12-20 00:54 EST by Masayoshi Yamazaki
Modified:	2013-08-05 23:50 EDT (History)
CC List:	6 users (show)

See Also:
Fixed In Version:	kernel-2.6.32-128.el6
Doc Type:	Bug Fix
Doc Text:	Invocating an EFI (Extensible Firmware Interface) call caused a restart or a failure to boot to occur on a system with more than 512GB of memory because the EFI page tables did not map the whole kernel space. EFI page tables used only one PGD (Page Global Directory) entry to map the kernel space; thus, virtual addresses higher than PAGE_OFFSET + 512GB could not be accessed. With this update, EFI page tables map the whole kernel space.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-05-19 08:28:03 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Fix efi pagetable (581 bytes, patch) 2011-01-13 16:28 EST, Takao Indoh	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0542	normal	SHIPPED_LIVE	Important: Red Hat Enterprise Linux 6.1 kernel security, bug fix and enhancement update	2011-05-19 07:58:07 EDT

Groups: None (edit)

Comment 6 Takao Indoh 2011-01-13 16:28:21 EST

Created attachment 473430 [details]
Fix efi pagetable

I confirmed this problem was reproduced on Fujitsu PRIMEQUEST(x86_64, uEFI-boot) with 1TB memory, and also confirmed this patch fixed the problem.

Comment 7 Jon Masters 2011-01-14 17:27:27 EST

Looks reasonable.

Comment 8 RHEL Product and Program Management 2011-01-17 18:00:41 EST

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Comment 13 Aristeu Rozanski 2011-03-30 10:31:45 EDT

Patch(es) available on kernel-2.6.32-128.el6

Comment 17 Martin Prpič 2011-05-05 04:55:19 EDT

    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:
Invocating an EFI (Extensible Firmware Interface) call caused a restart or a failure to boot to occur on a system with more than 512GB of memory because the EFI page tables did not map the whole kernel space. EFI page tables used only one PGD (Page Global Directory) entry to map the kernel space; thus, virtual addresses higher than PAGE_OFFSET + 512GB could not be accessed. With this update, EFI page tables map the whole kernel space.

Comment 18 errata-xmlrpc 2011-05-19 08:28:03 EDT

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-2011-0542.html

Note You need to log in before you can comment on or make changes to this bug.