Bug 699808 – dasd: fix race between open and offline [rhel-5.6.z]

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Bug 699808 - dasd: fix race between open and offline [rhel-5.6.z]

Summary:	dasd: fix race between open and offline [rhel-5.6.z]

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	5.6
Hardware:	s390x All

Priority	urgent Severity urgent
Target Milestone:	rc
Target Release:	---
Assigned To:	Phillip Lougher
QA Contact:	Red Hat Kernel QE team
Docs Contact:

URL:
Whiteboard:
Keywords:	ZStream

Depends On:	695357
Blocks:
	Show dependency tree / graph

Reported:	2011-04-26 12:22 EDT by Ken Reilly
Modified:	2011-06-02 09:31 EDT (History)
CC List:	13 users (show)

See Also:
Fixed In Version:	kernel-2.6.18-238.11.1.el5
Doc Type:	Bug Fix
Doc Text:	Setting a DASD (Direct Access Storage Device) device offline while another process is trying to open that device caused a race in the dasd_open function. The dasd_open function tried to read a pointer from the private_data field after the structure has already been freed, resulting in a dereference of an invalid pointer. With this update, the aforementioned pointer is now stored in a different structure; thus, preventing the race condition.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-05-31 10:08:23 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)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
IBM Linux Technology Center	71787	None	None	None	Never
Red Hat Product Errata	RHSA-2011:0833	normal	SHIPPED_LIVE	Important: kernel security and bug fix update	2011-05-31 10:05:42 EDT

Groups: None (edit)

Description Ken Reilly 2011-04-26 12:22:05 EDT

This bug has been copied from bug #695357 and has been proposed
to be backported to 5.6 z-stream (EUS).

Comment 4 Phillip Lougher 2011-04-28 07:49:47 EDT

in kernel-2.6.18-238.11.1.el5

linux-2.6-s390-dasd-fix-race-between-open-and-offline.patch

Comment 6 errata-xmlrpc 2011-05-31 10:08:23 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-2011-0833.html

Comment 7 Martin Prpič 2011-06-02 09:31:59 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:
Setting a DASD (Direct Access Storage Device) device offline while another process is trying to open that device caused a race in the dasd_open function. The dasd_open function tried to read a pointer from the private_data field after the structure has already been freed, resulting in a dereference of an invalid pointer. With this update, the aforementioned pointer is now stored in a different structure; thus, preventing the race condition.

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