postgresql-9.1 9.1.4-0ubuntu12.04 source package in Ubuntu

Changelog

postgresql-9.1 (9.1.4-0ubuntu12.04) precise-security; urgency=low

  * New upstream bug fix/security release: (LP: #1008317)
    - Fix incorrect password transformation in "contrib/pgcrypto"'s DES
      crypt() function.
      If a password string contained the byte value 0x80, the remainder
      of the password was ignored, causing the password to be much weaker
      than it appeared. With this fix, the rest of the string is properly
      included in the DES hash. Any stored password values that are
      affected by this bug will thus no longer match, so the stored
      values may need to be updated. (CVE-2012-2143)
    - Ignore SECURITY DEFINER and SET attributes for a procedural
      language's call handler. Applying such attributes to a call handler
      could crash the server. (CVE-2012-2655)
    - Make "contrib/citext"'s upgrade script fix collations of citext
      arrays and domains over citext.
      Release 9.1.2 provided a fix for collations of citext columns and
      indexes in databases upgraded or reloaded from pre-9.1
      installations, but that fix was incomplete: it neglected to handle
      arrays and domains over citext. This release extends the module's
      upgrade script to handle these cases. As before, if you have
      already run the upgrade script, you'll need to run the collation
      update commands by hand instead. See the 9.1.2 release notes for
      more information about doing this.
    - Allow numeric timezone offsets in timestamp input to be up to 16
      hours away from UTC. Some historical time zones have offsets larger than
      15 hours, the previous limit. This could result in dumped data values
      being rejected during reload.
    - Fix timestamp conversion to cope when the given time is exactly the
      last DST transition time for the current timezone.
      This oversight has been there a long time, but was not noticed
      previously because most DST-using zones are presumed to have an
      indefinite sequence of future DST transitions.
    - Fix text to name and char to name casts to perform string
      truncation correctly in multibyte encodings.
    - Fix memory copying bug in to_tsquery().
    - Ensure txid_current() reports the correct epoch when executed in
      hot standby.
    - Fix planner's handling of outer PlaceHolderVars within subqueries.
      This bug concerns sub-SELECTs that reference variables coming from
      the nullable side of an outer join of the surrounding query. In
      9.1, queries affected by this bug would fail with "ERROR:
      Upper-level PlaceHolderVar found where not expected". But in 9.0
      and 8.4, you'd silently get possibly-wrong answers, since the value
      transmitted into the subquery wouldn't go to null when it should.
    - Fix planning of UNION ALL subqueries with output columns that are
      not simple variables.
      Planning of such cases got noticeably worse in 9.1 as a result of a
      misguided fix for "MergeAppend child's targetlist doesn't match
      MergeAppend" errors. Revert that fix and do it another way.
    - Fix slow session startup when pg_attribute is very large.
      If pg_attribute exceeds one-fourth of shared_buffers, cache
      rebuilding code that is sometimes needed during session start would
      trigger the synchronized-scan logic, causing it to take many times
      longer than normal. The problem was particularly acute if many new
      sessions were starting at once.
    - Ensure sequential scans check for query cancel reasonably often.
      A scan encountering many consecutive pages that contain no live
      tuples would not respond to interrupts meanwhile.
    - Ensure the Windows implementation of PGSemaphoreLock() clears
      ImmediateInterruptOK before returning.
      This oversight meant that a query-cancel interrupt received later
      in the same query could be accepted at an unsafe time, with
      unpredictable but not good consequences.
    - Show whole-row variables safely when printing views or rules.
      Corner cases involving ambiguous names (that is, the name could be
      either a table or column name of the query) were printed in an
      ambiguous way, risking that the view or rule would be interpreted
      differently after dump and reload. Avoid the ambiguous case by
      attaching a no-op cast.
    - Fix "COPY FROM" to properly handle null marker strings that
      correspond to invalid encoding.
      A null marker string such as E'\\0' should work, and did work in
      the past, but the case got broken in 8.4.
    - Fix "EXPLAIN VERBOSE" for writable CTEs containing RETURNING
      clauses.
    - Fix "PREPARE TRANSACTION" to work correctly in the presence of
      advisory locks.
      Historically, "PREPARE TRANSACTION" has simply ignored any
      session-level advisory locks the session holds, but this case was
      accidentally broken in 9.1.
    - Fix truncation of unlogged tables.
    - Ignore missing schemas during non-interactive assignments of
      search_path.
      This re-aligns 9.1's behavior with that of older branches.
      Previously 9.1 would throw an error for nonexistent schemas
      mentioned in search_path settings obtained from places such as
      "ALTER DATABASE SET".
    - Fix bugs with temporary or transient tables used in extension
      scripts.
      This includes cases such as a rewriting "ALTER TABLE" within an
      extension update script, since that uses a transient table behind
      the scenes.
    - Ensure autovacuum worker processes perform stack depth checking
      properly.
      Previously, infinite recursion in a function invoked by
      auto-"ANALYZE" could crash worker processes.
    - Fix logging collector to not lose log coherency under high load.
      The collector previously could fail to reassemble large messages if
      it got too busy.
    - Fix logging collector to ensure it will restart file rotation after
      receiving SIGHUP.
    - Fix "too many LWLocks taken" failure in GiST indexes.
    - Fix WAL replay logic for GIN indexes to not fail if the index was
      subsequently dropped.
    - Correctly detect SSI conflicts of prepared transactions after a
      crash.
    - Avoid synchronous replication delay when committing a transaction
      that only modified temporary tables.
      In such a case the transaction's commit record need not be flushed
      to standby servers, but some of the code didn't know that and
      waited for it to happen anyway.
    - Fix error handling in pg_basebackup.
    - Fix walsender to not go into a busy loop if connection is
      terminated.
    - Fix memory leak in PL/pgSQL's "RETURN NEXT" command.
    - Fix PL/pgSQL's "GET DIAGNOSTICS" command when the target is the
      function's first variable.
    - Ensure that PL/Perl package-qualifies the _TD variable.
      This bug caused trigger invocations to fail when they are nested
      within a function invocation that changes the current package.
    - Fix PL/Python functions returning composite types to accept a
      string for their result value.
      This case was accidentally broken by the 9.1 additions to allow a
      composite result value to be supplied in other formats, such as
      dictionaries.
    - Fix potential access off the end of memory in psql's expanded
      display ("\x") mode.
    - Fix several performance problems in pg_dump when the database
      contains many objects.
      pg_dump could get very slow if the database contained many schemas,
      or if many objects are in dependency loops, or if there are many
      owned sequences.
    - Fix memory and file descriptor leaks in pg_restore when reading a
      directory-format archive.
    - Fix pg_upgrade for the case that a database stored in a non-default
      tablespace contains a table in the cluster's default tablespace.
    - In ecpg, fix rare memory leaks and possible overwrite of one byte
      after the sqlca_t structure.
    - Fix "contrib/dblink"'s dblink_exec() to not leak temporary database
      connections upon error.
    - Fix "contrib/dblink" to report the correct connection name in error
      messages.
    - Fix "contrib/vacuumlo" to use multiple transactions when dropping
      many large objects.
      This change avoids exceeding max_locks_per_transaction when many
      objects need to be dropped. The behavior can be adjusted with the
      new -l (limit) option.
 -- Martin Pitt <email address hidden>   Mon, 04 Jun 2012 06:31:48 +0200