Bug 240752

Summary:	kernel dm io: panic on large request
Product:	Red Hat Enterprise Linux 4	Reporter:	Milan Broz <mbroz>
Component:	kernel	Assignee:	Milan Broz <mbroz>
Status:	CLOSED ERRATA	QA Contact:	Martin Jenner <mjenner>
Severity:	high	Docs Contact:
Priority:	high
Version:	4.5	CC:	agk, dwysocha, jbrassow, pvrabec, rkenna
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	RHBA-2007-0791	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-11-15 16:27:26 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 Milan Broz 2007-05-21 13:39:34 UTC

+++ This bug was initially created as a clone of Bug #240751 +++
RHEL 4.6. clone, reproducer script in bug 240751

Kernel will panic when creating ~6TB mirror because bio_alloc_bioset() will
return NULL if 'num_vecs' is too large.

Patch upstream
http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/dm-io-fix-panic-on-large-request.patch

Comment 1 RHEL Program Management 2007-05-21 14:06:50 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 4 Jason Baron 2007-07-03 22:50:52 UTC

committed in stream U6 build 55.16. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 7 errata-xmlrpc 2007-11-15 16:27:26 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/RHBA-2007-0791.html