[Announce] Samba 4.4.0 Available for Download

Karolin Seeger kseeger at samba.org
Tue Mar 22 09:26:21 UTC 2016

           	 "In politics stupidity is not a

		  Napoleon Bonaparte

Release Announcements

This is the first stable release of the Samba 4.4 release series.


Nothing special.


Asynchronous flush requests

Flush requests from SMB2/3 clients are handled asynchronously and do
not block the processing of other requests. Note that 'strict sync'
has to be set to 'yes' for Samba to honor flush requests from SMB

s3: smbd

Remove '--with-aio-support' configure option. We no longer would ever prefer
POSIX-RT aio, use pthread_aio instead.

samba-tool sites

The 'samba-tool sites' subcommand can now be run against another server by
specifying an LDB URL using the '-H' option and not against the local database
only (which is still the default when no URL is given).

samba-tool domain demote

Add '--remove-other-dead-server' option to 'samba-tool domain demote'
subcommand. The new version of this tool now can remove another DC that is
itself offline.  The '--remove-other-dead-server' removes as many references
to the DC as possible.

samba-tool drs clone-dc-database

Replicate an initial clone of domain, but do not join it.
This is developed for debugging purposes, but not for setting up another DC.


Add '--set-nt-hash' option to pdbedit to update user password from nt-hash
hexstring. 'pdbedit -vw' shows also password hashes.


'smbstatus' was enhanced to show the state of signing and encryption for
sessions and shares.

The -u and -p options for user and password were replaced by the -U option that
accepts username[%password] as in many other tools of the Samba suite.
Similary, smbgetrc files do not accept username and password options any more,
only a single "user" option which also accepts user%password combinations.
The -P option was removed.


Add a GnuTLS based backupkey implementation.


Using the '--offline-logon' enables ntlm_auth to use cached passwords when the
DC is offline.

Allow '--password' force a local password check for ntlm-server-1 mode.


A new VFS module called vfs_offline has been added to mark all files in the
share as offline. It can be useful for shares mounted on top of a remote file
system (either through a samba VFS module or via FUSE).


The Samba KCC has been improved, but is still disabled by default.


There were several improvements concerning the Samba DNS server.

Active Directory

There were some improvements in the Active Directory area.

WINS nsswitch module

The WINS nsswitch module has been rewritten to address memory issues and to
simplify the code. The module now uses libwbclient to do WINS queries. This
means that winbind needs to be running in order to resolve WINS names using
the nss_wins module. This does not affect smbd.

CTDB changes

* CTDB now uses a newly implemented parallel database recovery scheme
  that avoids deadlocks with smbd.

  In certain circumstances CTDB and smbd could deadlock.  The new
  recovery implementation avoid this.  It also provides improved
  recovery performance.

* All files are now installed into and referred to by the paths
  configured at build time.  Therefore, CTDB will now work properly
  when installed into the default location at /usr/local.

* Public CTDB header files are no longer installed, since Samba and
  CTDB are built from within the same source tree.

* CTDB_DBDIR can now be set to tmpfs[:<tmpfs-options>]

  This will cause volatile TDBs to be located in a tmpfs.  This can
  help to avoid performance problems associated with contention on the
  disk where volatile TDBs are usually stored.  See ctdbd.conf(5) for
  more details.

* Configuration variable CTDB_NATGW_SLAVE_ONLY is no longer used.
  Instead, nodes should be annotated with the "slave-only" option in
  the CTDB NAT gateway nodes file.  This file must be consistent
  across nodes in a NAT gateway group.  See ctdbd.conf(5) for more

* New event script 05.system allows various system resources to be

  This can be helpful for explaining poor performance or unexpected
  behaviour.  New configuration variables are
  CTDB_MONITOR_SWAP_USAGE.  Default values cause warnings to be
  ctdbd.conf(5) for more information.

  The memory, swap and filesystem usage monitoring previously found in
  00.ctdb and 40.fs_use is no longer available.  Therefore,
  configuration variables CTDB_CHECK_FS_USE, CTDB_MONITOR_FREE_MEMORY,
  now ignored.

* The 62.cnfs eventscript has been removed.  To get a similar effect
  just do something like this:

      mmaddcallback ctdb-disable-on-quorumLoss \
        --command /usr/bin/ctdb \
        --event quorumLoss --parms "disable"

      mmaddcallback ctdb-enable-on-quorumReached \
        --command /usr/bin/ctdb \
        --event quorumReached --parms "enable"

* The CTDB tunable parameter EventScriptTimeoutCount has been renamed
  to MonitorTimeoutCount

  It has only ever been used to limit timed-out monitor events.

  Configurations containing CTDB_SET_EventScriptTimeoutCount=<n> will
  cause CTDB to fail at startup.  Useful messages will be logged.

* The commandline option "-n all" to CTDB tool has been removed.

  The option was not uniformly implemented for all the commands.
  Instead of command "ctdb ip -n all", use "ctdb ip all".

* All CTDB current manual pages are now correctly installed


SMB3 Multi-Channel

Samba 4.4.0 adds *experimental* support for SMB3 Multi-Channel.
Multi-Channel is an SMB3 protocol feature that allows the client
to bind multiple transport connections into one authenticated
SMB session. This allows for increased fault tolerance and
throughput. The client chooses transport connections as reported
by the server and also chooses over which of the bound transport
connections to send traffic. I/O operations for a given file
handle can span multiple network connections this way.
An SMB multi-channel session will be valid as long as at least
one of its channels are up.

In Samba, multi-channel can be enabled by setting the new
smb.conf option "server multi channel support" to "yes".
It is disabled by default.

Samba has to report interface speeds and some capabilities to
the client. On Linux, Samba can auto-detect the speed of an
interface. But to support other platforms, and in order to be
able to manually override the detected values, the "interfaces"
smb.conf option has been given an extended syntax, by which an
interface specification can additionally carry speed and
capability information. The extended syntax looks like this
for setting the speed to 1 gigabit per second:

    interfaces =;speed=1000000000

This extension should be used with care and are mainly intended
for testing. See the smb.conf manual page for details.

CAVEAT: While this should be working without problems mostly,
there are still corner cases in the treatment of channel failures
that may result in DATA CORRUPTION when these race conditions hit.
It is hence


at this stage. This situation can be expected to improve during
the life-time of the 4.4 release. Feed-back from test-setups is
highly welcome.


Public headers

Several public headers are not installed any longer. They are made for internal
use only. More public headers will very likely be removed in future releases.

The following headers are not installed any longer:
dlinklist.h, gen_ndr/epmapper.h, gen_ndr/mgmt.h, gen_ndr/ndr_atsvc_c.h,
gen_ndr/ndr_epmapper_c.h, gen_ndr/ndr_epmapper.h, gen_ndr/ndr_mgmt_c.h,
gen_ndr/ndr_mgmt.h,gensec.h, ldap_errors.h, ldap_message.h, ldap_ndr.h,
ldap-util.h, pytalloc.h, read_smb.h, registry.h, roles.h, samba_util.h,
smb2_constants.h, smb2_create_blob.h, smb2.h, smb2_lease.h, smb2_signing.h,
smb_cli.h, smb_cliraw.h, smb_common.h, smb_composite.h, smb_constants.h,
smb_raw.h, smb_raw_interfaces.h, smb_raw_signing.h, smb_raw_trans2.h,
smb_request.h, smb_seal.h, smb_signing.h, smb_unix_ext.h, smb_util.h,
torture.h, tstream_smbXcli_np.h.


The SMB traffic analyzer VFS module has been removed, because it is not
maintained any longer and not widely used.


The scannedonly VFS module has been removed, because it is not maintained
any longer.

smb.conf changes

  Parameter Name		Description		Default
  --------------		-----------		-------
  aio max threads               New                     100
  ldap page size		Changed default		1000
  server multi channel support	New			No
  interfaces			Extended syntax


Currently none.


o  Michael Adam <obnox at samba.org>
   * BUG 11796: smbd: Enable multi-channel if 'server multi channel support =
     yes' in the config.

o  Günther Deschner <gd at samba.org>
   * BUG 11802: lib/socket/interfaces: Fix some uninitialied bytes.

o  Uri Simchoni <uri at samba.org>
   * BUG 11798: build: Fix build when '--without-quota' specified.


o  Andrew Bartlett <abartlet at samba.org>
   * BUG 11780: mkdir can return ACCESS_DENIED incorrectly on create race.
   * BUG 11783: Mismatch between local and remote attribute ids lets
     replication fail with custom schema.
   * BUG 11789: Talloc: Version 2.1.6.

o  Ira Cooper <ira at samba.org>
   * BUG 11774: vfs_glusterfs: Fix use after free in AIO callback.

o  Günther Deschner <gd at samba.org>
   * BUG 11755: Fix net join.

o  Amitay Isaacs <amitay at gmail.com>
   * BUG 11770: Reset TCP Connections during IP failover.

o  Justin Maggard <jmaggard10 at gmail.com>
   * BUG 11773: s3:smbd: Add negprot remote arch detection for OSX.

o  Stefan Metzmacher <metze at samba.org>
   * BUG 11772: ldb: Version 1.1.26.
   * BUG 11782: "trustdom_list_done: Got invalid trustdom response" message
     should be avoided.

o  Uri Simchoni <uri at samba.org>
   * BUG 11769: libnet: Make Kerberos domain join site-aware.
   * BUG 11788: Quota is not supported on Solaris 10.


o  Jeremy Allison <jra at samba.org>
   * BUG 11648: CVE-2015-7560: Getting and setting Windows ACLs on symlinks can
     change permissions on link target.

o  Christian Ambach <ambi at samba.org>
   * BUG 11767: s3:utils/smbget: Fix option parsing.

o  Alberto Maria Fiaschi <alberto.fiaschi at estar.toscana.it>
   * BUG 8093: Access based share enum: handle permission set in configuration

o  Stefan Metzmacher <metze at samba.org>
   * BUG 11702: s3:clispnego: Fix confusing warning in spnego_gen_krb5_wrap().
   * BUG 11742: tevent: version 0.9.28: Fix memory leak when old signal action
   * BUG 11755: s3:libads: setup the msDS-SupportedEncryptionTypes attribute on
   * BUGs 11128, 11686: CVE-2016-0771: Read of uninitialized memory DNS TXT

o  Garming Sam <garming at catalyst.net.nz>
   * BUGs 11128, 11686: CVE-2016-0771: Read of uninitialized memory DNS TXT

o  Uri Simchoni <uri at samba.org>
   * BUG 11691: winbindd: Return trust parameters when listing trusts.
   * BUG 11753: smbd: Ignore SVHDX create context.
   * BUG 11763: passdb: Add linefeed to debug message.


o  Michael Adam <obnox at samba.org>
   * BUG 11723: lib:socket: Fix CID 1350010: Integer OVERFLOW_BEFORE_WIDEN.
   * BUG 11735: lib:socket: Fix CID 1350009: Fix illegal memory accesses

o  Jeremy Allison <jra at samba.org>
   * BUG 10489: s3: smbd: posix_acls: Fix check for setting u:g:o entry on a
     filesystem with no ACL support.

o  Christian Ambach <ambi at samba.org>
   * BUG 11700: s3:utils/smbget: Set default blocksize.

o  Anoop C S <anoopcs at redhat.com>
   * BUG 11734: lib/socket: Fix improper use of default interface speed.

o  Ralph Boehme <slow at samba.org>
   * BUG 11714: lib/tsocket: Work around sockets not supporting FIONREAD.

o  Volker Lendecke <vl at samba.org>
   * BUG 11724: smbd: Fix CID 1351215 Improper use of negative value.
   * BUG 11725: smbd: Fix CID 1351216 Dereference null return value.
   * BUG 11732: param: Fix str_list_v3 to accept ; again.

o  Noel Power <noel.power at suse.com>
   * BUG 11738: libcli: Fix debug message, print sid string for new_ace trustee.

o  Jose A. Rivera <jarrpa at samba.org>
   * BUG 11727: s3:smbd:open: Skip redundant call to file_set_dosmode when
     creating a new file.

o  Andreas Schneider <asn at samba.org>
   * BUG 11730: docs: Add manpage for cifsdd.
   * BUG 11739: Fix installation path of Samba helper binaries.

o  Berend De Schouwer <berend.de.schouwer at gmail.com>
   * BUG 11643: docs: Add example for domain logins to smbspool man page.

o  Martin Schwenke <martin at meltin.net>
   * BUG 11719: ctdb-scripts: Drop use of "smbcontrol winbindd ip-dropped ..."

o  Hemanth Thummala <hemanth.thummala at nutanix.com>
   * BUG 11708: loadparm: Fix memory leak issue.
   * BUG 11740: Fix memory leak in loadparm.


o  Michael Adam <obnox at samba.org>
   * BUG 11715: s3:vfs:glusterfs: Fix build after quota changes.

o  Jeremy Allison <jra at samba.org>
   * BUG 11703: s3: smbd: Fix timestamp rounding inside SMB2 create.

o  Christian Ambach <ambi at samba.org>
   * BUG 11700: Streamline 'smbget' options with the rest of the Samba utils.

o  Günther Deschner <gd at samba.org>
   * BUG 11696: ctdb: Do not provide a useless pkgconfig file for ctdb.

o  Stefan Metzmacher <metze at samba.org>
   * BUG 11699: Crypto.Cipher.ARC4 is not available on some platforms, fallback
     to M2Crypto.RC4.RC4 then.

o  Amitay Isaacs <amitay at gmail.com>
   * BUG 11705: Sockets with htons(IPPROTO_RAW) and CVE-2015-8543.

o  Andreas Schneider <asn at samba.org>
   * BUG 11690: docs: Add smbspool_krb5_wrapper manpage.

o  Uri Simchoni <uri at samba.org>
   * BUG 11681: smbd: Show correct disk size for different quota and dfree block

Reporting bugs & Development Discussion

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical IRC channel on irc.freenode.net.

If you do report problems then please try to send high quality
feedback. If you don't provide vital information to help us track down
the problem then you will probably be ignored.  All bug reports should
be filed under the Samba 4.1 and newer product in the project's Bugzilla
database (https://bugzilla.samba.org/).

== Our Code, Our Bugs, Our Responsibility.
== The Samba Team

Download Details

The uncompressed tarballs and patch files have been signed
using GnuPG (ID 6568B7EA).  The source code can be downloaded


The release notes are available online at:


Our Code, Our Bugs, Our Responsibility.

                        The Samba Team
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