Bug 158878

Summary:	CAN-2005-1265 Prevent NULL mmap in topdown model
Product:	Red Hat Enterprise Linux 4	Reporter:	Mark J. Cox <mjc>
Component:	kernel	Assignee:	Rik van Riel <riel>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	medium
Version:	4.0	CC:	davej, jbaron, poelstra, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	public=20050519,impact=important,source=bk
Fixed In Version:	RHSA-2005-514	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-10-05 13:17:39 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:	156322

Description Mark J. Cox 2005-05-26 14:39:21 UTC

Chris wright reported a problem with the topdown allocator.  This issue is
believed to allow a crash, but not result in gaining privileges (most likely due
to the BUG() cases added to 2.6 after a previous exploit).  

We didn't check RHEL4 specifically to determine if this issue affect our shipped
version.   More details see

http://marc.theaimsgroup.com/?l=bk-commits-head&m=111651913006107
    
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=07ab67c8d0d7c1021343b7d5c045033d6bf7be69

Comment 2 Rik van Riel 2005-07-11 21:26:40 UTC

I just submitted a patch.

Comment 9 Red Hat Bugzilla 2005-10-05 13:17:40 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-2005-514.html