Bug 446142

Summary:	CIFS: slab error in kmem_cache_destroy(): cache `cifs_request': Can't free all objects
Product:	Red Hat Enterprise Linux 5	Reporter:	Jeff Layton <jlayton>
Component:	kernel	Assignee:	Jeff Layton <jlayton>
Status:	CLOSED ERRATA	QA Contact:	Martin Jenner <mjenner>
Severity:	low	Docs Contact:
Priority:	low
Version:	5.3	CC:	staubach, steved
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 20:24:01 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:	447397

Description Jeff Layton 2008-05-12 23:58:04 UTC

After some CIFS testing on 2.6.18-92.el5xen, I got this:

slab error in kmem_cache_destroy(): cache `cifs_request': Can't free all objects
 [<c046bdbf>] kmem_cache_destroy+0x61/0xf3
 [<e0f61153>] cifs_destroy_request_bufs+0x14/0x28 [cifs]
 [<e0f7e576>] exit_cifs+0x1e/0x80 [cifs]
 [<c043aeae>] sys_delete_module+0x192/0x1b8
 [<c04451fd>] audit_syscall_entry+0x14b/0x17d
 [<c0405413>] syscall_call+0x7/0xb
 =======================
kmem_cache_create: duplicate cache cifs_request
 [<c046b91b>] kmem_cache_create+0x453/0x483
 [<c046aa47>] kmem_cache_alloc+0x54/0x5e
 [<e0f61276>] cifs_init_request_bufs+0x53/0x182 [cifs]
 [<e0c3c151>] init_cifs+0x151/0x22c [cifs]
 [<c043aafd>] sys_init_module+0x18b5/0x1a60
 [<c046bd5e>] kmem_cache_destroy+0x0/0xf3
 [<c04451fd>] audit_syscall_entry+0x14b/0x17d
 [<c0405413>] syscall_call+0x7/0xb

...not sure exactly what caused it...

Comment 1 Jeff Layton 2008-05-14 20:09:04 UTC

Turned out to be a problem in the error path for readdir. Patch has been pushed
upstream.

Comment 2 RHEL Program Management 2008-06-19 14:24:42 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 Don Zickus 2008-09-13 01:47:08 UTC

in kernel-2.6.18-113.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Comment 8 errata-xmlrpc 2009-01-20 20:24:01 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