BIND 9.9.1-P2 is now available
Cathy Almond
cathya at isc.org
Tue Jul 24 18:04:48 UTC 2012
Introduction
BIND 9.9.1-P2 is the latest production release of BIND 9.9.
This document summarizes changes from BIND 9.9.0 to BIND 9.9.1-P2.
Please see the CHANGES file in the source code release for a complete
list of all changes.
Download
The latest versions of BIND 9 software can always be found on our
web site at http://www.isc.org/downloads/all. There you will find
additional information about each release, source code, and
pre-compiled versions for Microsoft Windows operating systems.
Support
Product support information is available on
http://www.isc.org/services/support for paid support options.
Free support is provided by our user community via a mailing list.
Information on all public email lists is available at
https://lists.isc.org/mailman/listinfo.
Security Fixes
- Prevents a named assert (crash) when validating caused by using
"Bad cache" data before it has been initialized. [RT #30025]
- ISC_QUEUE handling for recursive clients was updated to address a
race condition that could cause a memory leak. This rarely occurred
with UDP clients, but could be a significant problem for a server
handling a steady rate of TCP queries. [RT #29539 & #30233]
- Under heavy incoming TCP query loads named could experience a
memory leak which could lead to significant reductions in query
response or cause the server to be terminated on systems with
"out of memory" killers. [RT #29539]
- A condition has been corrected where improper handling of zero-length
RDATA could cause undesirable behavior, including termination of
the named process. [RT #29644]
New Features
- None
Feature Changes
- BIND now recognizes the TLSA resource record type, created to
support IETF DANE (DNS-based Authentication of Named Entities)
[RT #28989]
- A note will be added to the README in future releases to explain
that the improved scalability provided by using multiple threads
to listen for and process queries (change 3137, RT #22992) does
not provide any performance benefit when running BIND on versions
of the linux kernel that do not include the 'lockless UDP transmit
path' changes that were incorporated in 2.6.39. (Some linux
distributors may have provided this functionality under their own
version numbering systems).
Bug Fixes
- Fixes the defect introduced by change #3314 that was causing
failures when saving stub zones to disk (resulting in excessive
CPU usage in some cases). [RT #29952]
- The locking strategy around the handling of iterative queries has
been tuned to reduce unnecessary contention in a multi-threaded
environment. (Note that this may not provide a measurable
improvement over previous versions of BIND, but it corrects the
performance impact of change 3309 / RT #27995) [RT #29239]
- Addresses a race condition that can cause named to to crash when
the masters list for a zone is updated via rndc reload/reconfig
[RT #26732]
- named-checkconf now correctly validates dns64 clients acl
definitions. [RT #27631]
- Fixes a race condition in zone.c that can cause named to crash
during the processing of rndc delzone [RT #29028]
- Prevents a named segfault from resolver.c due to procedure
fctx_finddone() not being thread-safe. [RT #27995]
- Improves DNS64 reverse zone performance. [RT #28563]
- Adds wire format lookup method to sdb. [RT #28563]
- Uses hmctx, not mctx when freeing rbtdb->heaps to avoid triggering
an assertion when flushing cache data. [RT #28571]
- Prevents intermittent named crashes following an rndc reload [RT #28606]
- Resolves inconsistencies in locating DNSSEC keys where zone names
contain characters that require special mappings [RT #28600]
- A new flag -R has been added to queryperf for running tests using
non-recursive queries. It also now builds correctly on MacOS
version 10.7 (darwin) [RT #28565]
- Named no longer crashes if gssapi is enabled in named.conf but
was not compiled into the binary [RT #28338]
- SDB now handles unexpected errors from back-end database drivers
gracefully instead of exiting on an assert. [RT #28534]
- Prevents named crashes as a result of dereferencing a NULL pointer
in zmgr_start_xfrin_ifquota if the zone was being removed while
there were zone transfers still pending [RT #28419]
- Corrects a parser bug that could cause named to crash while reading
a malformed zone file. [RT #28467]
- Ensures that when a client recurses its status fields are
consistently set so that named doesn't fail on an INSIST in
client.c:exit_check. [RT #28346]
- Fixed a problem preventing proper use of 64 bit time values in
libbind. [RT # 26542]
- isccc/cc.c:table_fromwire could fail to free an allocated object
on error, leading to a possible memory leak condition. [RT #28265]
- Fixed a build error on systems without ENOTSUP. [RT #28200]
- The header file isc/hmacsha.h is now installed when building BIND. [RT
#28169]
- AAAA responses will no longer be returned in the additional section
when filter-aaaa-on-v4 is in use. (Prior to this change, they
would be returned for some query types). [RT #27292]
Thank You
Thank you to everyone who assisted us in making this release
possible. If you would like to contribute to ISC to assist us in
continuing to make quality open source software, please visit our
donations page at http://www.isc.org/supportisc.
(c) 2001-2012 Internet Systems Consortium
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