Bug 253313

Summary:	CVE-2007-3739 LTC36188-Don't allow the stack to grow into hugetlb reserved regions
Product:	Red Hat Enterprise Linux 5	Reporter:	Marcel Holtmann <holtmann>
Component:	kernel	Assignee:	Don Howard <dhoward>
Status:	CLOSED ERRATA	QA Contact:	Martin Jenner <mjenner>
Severity:	medium	Docs Contact:
Priority:	urgent
Version:	5.0	CC:	jturner, qcai, security-response-team, tao
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=moderate,source=redhat,reported=20070710,public=20070831
Fixed In Version:	RHSA-2007-0705	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-09-13 09:13:23 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:	294941

Description Marcel Holtmann 2007-08-17 20:02:43 UTC

From Adam Litke's mail to LKML (http://lkml.org/lkml/2007/1/29/180):

[PATCH] Don't allow the stack to grow into hugetlb reserved regions
    
    When expanding the stack, we don't currently check if the VMA will cross
    into an area of the address space that is reserved for hugetlb pages.
    Subsequent faults on the expanded portion of such a VMA will confuse the
    low-level MMU code, resulting in an OOPS.  Check for this.

Comment 1 Don Howard 2007-08-31 17:29:25 UTC

A patch for this issue has been included in build 2.6.18-8.1.10.

Comment 4 Red Hat Bugzilla 2007-09-13 09:13:23 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 the 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-2007-0705.html