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Bug 457569

Summary:	dlm get_comm() uses NULL pointer
Product:	Red Hat Enterprise Linux 5	Reporter:	David Teigland <teigland>
Component:	kernel	Assignee:	Don Zickus <dzickus>
Status:	CLOSED ERRATA	QA Contact:	Cluster QE <mspqa-list>
Severity:	high	Docs Contact:
Priority:	high
Version:	5.2	CC:	ccaulfie, edamato, lwang, rpeterso
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-01-20 19:51:54 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:

Description David Teigland 2008-08-01 15:15:22 UTC

Description of problem:

Bob reported seeing this in some of his gfs testing.

<bob_home> Unable to handle kernel NULL pointer dereference at 0000000000000050
RIP: 
<bob_home>  [<ffffffff8849f94e>] :dlm:get_comm+0x45/0xce
<bob_home> P
<bob_home> Call Trace:
<bob_home>  [<ffffffff884a97a9>] :dlm:process_send_sockets+0x0/0x179
<bob_home>  [<ffffffff8849fa10>] :dlm:dlm_nodeid_to_addr+0x10/0x48
<bob_home>  [<ffffffff884a925b>] :dlm:tcp_connect_to_sock+0x9c/0x1de

This upstream commit seems to be a very likely match:

http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=3168b0780d06ace875696f8a648d04d6089654e5

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


How reproducible:


Steps to Reproduce:
1.
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Actual results:


Expected results:


Additional info:

Comment 1 RHEL Program Management 2008-08-01 15:31:31 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 2 David Teigland 2008-08-01 16:19:10 UTC

patch sent to rhkernel
http://post-office.corp.redhat.com/archives/rhkernel-list/2008-August/msg00009.html

Comment 3 Don Zickus 2008-08-06 17:57:27 UTC

in kernel-2.6.18-102.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Comment 7 errata-xmlrpc 2009-01-20 19:51:54 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