Bug 455478

Summary: 2.6.26 backport of "check physical address range in ioremap" into RHEL5-U3
Product: Red Hat Enterprise Linux 5 Reporter: Larry Woodman <lwoodman>
Component: kernelAssignee: Larry Woodman <lwoodman>
Status: CLOSED ERRATA QA Contact: Martin Jenner <mjenner>
Severity: medium Docs Contact:
Priority: medium    
Version: 5.3CC: dzickus, mgahagan, prarit
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-01-20 20:15:49 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: 455409    
Attachments:
Description Flags
Backported patch to address this problem. none

Description Larry Woodman 2008-07-15 17:57:23 UTC 
Description of problem:

BUG: unable to handle kernel paging request at ffffc20001a0a000
IP: [<ffffffff8021dacc>] clflush_cache_range+0xc/0x25
PGD 1bf80e067 PUD 1bf80f067 PMD 1bb497067 PTE 80000047000ee17b

This is on a Intel machine with 36bit physical address space. The PTE
entry references 47000ee000, which is outside of it.

Add a check for the physical address space and warn/printk about the
stupid caller.


Version-Release number of selected component (if applicable):

RHEL5-U3.

How reproducible:

Need to pass page address to ioremap().

Steps to Reproduce:
1.
2.
3.
  
Actual results:

BUG: unable to handle kernel paging request at ffffc20001a0a000

Expected results:

ioremap: invalid physical address 0x00000000xxxxxxxx

Additional info:
Comment 1 Larry Woodman 2008-07-15 17:57:23 UTC 
Created attachment 311857 [details]
Backported patch to address this problem.
Comment 2 Linda Wang 2008-07-31 18:42:55 UTC 
Raised as exception to 5.3:

Needed as part of 2.5.26 x86 backport support
Comment 3 RHEL Program Management 2008-07-31 18:43:51 UTC 
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 5 Don Zickus 2008-09-19 15:39:14 UTC 
in kernel-2.6.18-116.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5
Comment 8 errata-xmlrpc 2009-01-20 20:15:49 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-2009-0225.html