3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
119 lines
4.4 KiB
Text
119 lines
4.4 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
Hash: SHA1
|
|
|
|
=============================================================================
|
|
FreeBSD-EN-07:01.nfs Errata Notice
|
|
The FreeBSD Project
|
|
|
|
Topic: NFS server reliability issues
|
|
|
|
Category: core
|
|
Module: sys_nfsserver
|
|
Announced: 2007-02-14
|
|
Credits: Kostik Belousov,
|
|
Pawel Jakub Dawidek,
|
|
Padma Bhooma,
|
|
Hiroki Sato
|
|
Affects: All FreeBSD 6.x releases prior to 6.2-RELEASE
|
|
Corrected: 2007-01-07 13:20:24 UTC (RELENG_6, 6.2-STABLE)
|
|
2007-02-14 22:30:33 UTC (RELENG_6_1, 6.1-RELEASE-p14)
|
|
2007-02-14 22:29:57 UTC (RELENG_6_0, 6.0-RELEASE-p18)
|
|
|
|
For general information regarding FreeBSD Errata Notices and Security
|
|
Advisories, including descriptions of the fields above, security
|
|
branches, and the following sections, please visit
|
|
<URL:http://security.FreeBSD.org/>.
|
|
|
|
I. Background
|
|
|
|
The Network File System (NFS) allows a host to export some or all of
|
|
its file systems so that other hosts can access them over the network
|
|
and mount them as if they were on local disks. NFS is built on top of
|
|
the Sun Remote Procedure Call (RPC) framework. FreeBSD includes
|
|
server and client implementations of NFS.
|
|
|
|
II. Problem Description
|
|
|
|
The NFS server subsystem had the following three problems:
|
|
|
|
- Inconsistent locking that leads to performance degradation and can
|
|
cause a system panic during certain operations to manipulate symbolic
|
|
links.
|
|
|
|
- A memory leak in pathname lookup operation.
|
|
|
|
- A bug that prevents a symbolic link with a particular pathname from
|
|
being created.
|
|
|
|
III. Impact
|
|
|
|
Under some circumstances, the NFS server subsystem can cause a system
|
|
panic due to bugs in the FreeBSD kernel. This can be serious and could
|
|
lead to a denial of service especially in an NFS server configuration
|
|
where the server shares home directories amongst many clients.
|
|
This is because several particular operations from a client can trigger
|
|
the panic without special privilege on either the server and the client.
|
|
|
|
IV. Solution
|
|
|
|
Perform one of the following:
|
|
|
|
1) Upgrade your affected system to 6-STABLE, or to the RELENG_6_1 or
|
|
RELENG_6_0 errata branch dated after the correction date.
|
|
|
|
2) To patch your present system:
|
|
|
|
The following patches have been verified to apply to FreeBSD 6.0 and
|
|
6.1 systems.
|
|
|
|
a) Download the relevant patch from the location below, and verify the
|
|
detached PGP signature using your PGP utility.
|
|
|
|
[FreeBSD 6.0]
|
|
# fetch http://security.FreeBSD.org/patches/EN-07:01/nfs60.patch
|
|
# fetch http://security.FreeBSD.org/patches/EN-07:01/nfs60.patch.asc
|
|
|
|
[FreeBSD 6.1]
|
|
# fetch http://security.FreeBSD.org/patches/EN-07:01/nfs61.patch
|
|
# fetch http://security.FreeBSD.org/patches/EN-07:01/nfs61.patch.asc
|
|
|
|
b) Apply the patch.
|
|
|
|
# cd /usr/src
|
|
# patch < /path/to/patch
|
|
|
|
c) Recompile your kernel as described in
|
|
<URL:http://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
|
|
system.
|
|
|
|
V. Correction details
|
|
|
|
The following list contains the revision numbers of each file that was
|
|
corrected in FreeBSD.
|
|
|
|
Branch Revision
|
|
Path
|
|
- -------------------------------------------------------------------------
|
|
RELENG_6_1
|
|
src/UPDATING 1.416.2.22.2.16
|
|
src/sys/conf/newvers.sh 1.69.2.11.2.16
|
|
src/sys/nfsserver/nfs_serv.c 1.156.2.2.2.1
|
|
src/sys/nfsserver/nfs_srvsubs.c 1.136.2.2.2.1
|
|
src/sys/nfsserver/nfsm_subs.h 1.37.6.1
|
|
RELENG_6_0
|
|
src/UPDATING 1.416.2.3.2.23
|
|
src/sys/conf/newvers.sh 1.69.2.8.2.19
|
|
src/sys/nfsserver/nfs_serv.c 1.156.4.1
|
|
src/sys/nfsserver/nfs_srvsubs.c 1.136.4.1
|
|
src/sys/nfsserver/nfsm_subs.h 1.37.4.1
|
|
- -------------------------------------------------------------------------
|
|
|
|
The latest revision of this Errata Notice is available at
|
|
http://security.FreeBSD.org/advisories/FreeBSD-EN-07:01.nfs.asc
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: GnuPG v1.4.6 (FreeBSD)
|
|
|
|
iD8DBQFF047GFdaIBMps37IRAlDuAJ9sjXfjvIl+F9/sqZSXksUeagRIAwCePXsA
|
|
cb9f5GWVCblMm/Y90CUjYTE=
|
|
=g+wq
|
|
-----END PGP SIGNATURE-----
|