Bug 451317 – deadlock when rpc_malloc tries to flush NFS pages

Bug 451317 - deadlock when rpc_malloc tries to flush NFS pages

Summary:	deadlock when rpc_malloc tries to flush NFS pages

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	5.2
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Jeff Layton
QA Contact:	Martin Jenner
Docs Contact:

URL:
Whiteboard:
Keywords:

Duplicates:	454266 (view as bug list)
Depends On:	450743
Blocks:
	Show dependency tree / graph

Reported:	2008-06-13 15:44 EDT by Jeff Layton
Modified:	2012-01-03 23:42 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2009-01-20 15:14:38 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
proposed patch -- don't allow rpc_malloc to block (2.25 KB, patch) 2008-07-07 07:24 EDT, Jeff Layton	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Comment 1 Jeff Layton 2008-06-13 15:45:38 EDT

Cloning bug for RHEL5. I think it's likely to be vulnerable to the same problem.
Lowering sev/pri here though since no one has hit this on RHEL5 that I'm aware of...

Comment 2 RHEL Product and Program Management 2008-06-19 10:24:21 EDT

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 4 Jeff Layton 2008-07-07 07:01:02 EDT

*** Bug 454266 has been marked as a duplicate of this bug. ***

Comment 5 Jeff Layton 2008-07-07 07:24:21 EDT

Created attachment 311138 [details]
proposed patch -- don't allow rpc_malloc to block

proposed patch -- untested as of yet

Comment 6 Jeff Layton 2008-07-09 09:24:22 EDT

Tested and seems to work OK

Comment 7 Jeff Layton 2008-07-09 09:24:58 EDT

Patch posted to RHKL:

Subject: [RHEL5.3 PATCH] BZ#451317: sunrpc: prevent deadlock by not allowing
rpc_malloc to sleep

Comment 8 Don Zickus 2008-07-18 16:07:48 EDT

in kernel-2.6.18-98.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Comment 12 errata-xmlrpc 2009-01-20 15:14:38 EST

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

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