Created by James Westby on 2010-10-07 and last modified on 2012-02-28
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17. By Martin Pitt on 2012-02-27

* New upstream bug fix/security release: (LP: #941912)
  - Require execute permission on the trigger function for "CREATE
    This missing check could allow another user to execute a trigger
    function with forged input data, by installing it on a table he
    owns. This is only of significance for trigger functions marked
    SECURITY DEFINER, since otherwise trigger functions run as the
    table owner anyway. (CVE-2012-0866)
  - Remove arbitrary limitation on length of common name in SSL
    Both libpq and the server truncated the common name extracted from
    an SSL certificate at 32 bytes. Normally this would cause nothing
    worse than an unexpected verification failure, but there are some
    rather-implausible scenarios in which it might allow one
    certificate holder to impersonate another. The victim would have to
    have a common name exactly 32 bytes long, and the attacker would
    have to persuade a trusted CA to issue a certificate in which the
    common name has that string as a prefix. Impersonating a server
    would also require some additional exploit to redirect client
    connections. (CVE-2012-0867)
  - Convert newlines to spaces in names written in pg_dump comments.
    pg_dump was incautious about sanitizing object names that are
    emitted within SQL comments in its output script. A name containing
    a newline would at least render the script syntactically incorrect.
    Maliciously crafted object names could present a SQL injection risk
    when the script is reloaded. (CVE-2012-0868)
  - Fix btree index corruption from insertions concurrent with
    An index page split caused by an insertion could sometimes cause a
    concurrently-running "VACUUM" to miss removing index entries that
    it should remove. After the corresponding table rows are removed,
    the dangling index entries would cause errors (such as "could not
    read block N in file ...") or worse, silently wrong query results
    after unrelated rows are re-inserted at the now-free table
    locations. This bug has been present since release 8.2, but occurs
    so infrequently that it was not diagnosed until now. If you have
    reason to suspect that it has happened in your database, reindexing
    the affected index will fix things.
  - Update per-column permissions, not only per-table permissions, when
    changing table owner.
    Failure to do this meant that any previously granted column
    permissions were still shown as having been granted by the old
    owner. This meant that neither the new owner nor a superuser could
    revoke the now-untraceable-to-table-owner permissions.
  - Allow non-existent values for some settings in "ALTER USER/DATABASE
    Allow default_text_search_config, default_tablespace, and
    temp_tablespaces to be set to names that are not known. This is
    because they might be known in another database where the setting
    is intended to be used, or for the tablespace cases because the
    tablespace might not be created yet. The same issue was previously
    recognized for search_path, and these settings now act like that
  - Avoid crashing when we have problems deleting table files
    Dropping a table should lead to deleting the underlying disk files
    only after the transaction commits. In event of failure then (for
    instance, because of wrong file permissions) the code is supposed
    to just emit a warning message and go on, since it's too late to
    abort the transaction. This logic got broken as of release 8.4,
    causing such situations to result in a PANIC and an unrestartable
  - Track the OID counter correctly during WAL replay, even when it
    wraps around.
    Previously the OID counter would remain stuck at a high value until
    the system exited replay mode. The practical consequences of that
    are usually nil, but there are scenarios wherein a standby server
    that's been promoted to master might take a long time to advance
    the OID counter to a reasonable value once values are needed.
  - Fix regular expression back-references with - attached.
    Rather than enforcing an exact string match, the code would
    effectively accept any string that satisfies the pattern
    sub-expression referenced by the back-reference symbol.
    A similar problem still afflicts back-references that are embedded
    in a larger quantified expression, rather than being the immediate
    subject of the quantifier. This will be addressed in a future
    PostgreSQL release.
  - Fix recently-introduced memory leak in processing of inet/cidr
  - Fix dangling pointer after "CREATE TABLE AS"/"SELECT INTO" in a
    SQL-language function.
    In most cases this only led to an assertion failure in
    assert-enabled builds, but worse consequences seem possible.
  - Fix I/O-conversion-related memory leaks in plpgsql.
  - Improve pg_dump's handling of inherited table columns.
    pg_dump mishandled situations where a child column has a different
    default expression than its parent column. If the default is
    textually identical to the parent's default, but not actually the
    same (for instance, because of schema search path differences) it
    would not be recognized as different, so that after dump and
    restore the child would be allowed to inherit the parent's default.
    Child columns that are NOT NULL where their parent is not could
    also be restored subtly incorrectly.
  - Fix pg_restore's direct-to-database mode for INSERT-style table
    Direct-to-database restores from archive files made with
    "--inserts" or "--column-inserts" options fail when using
    pg_restore from a release dated September or December 2011, as a
    result of an oversight in a fix for another problem. The archive
    file itself is not at fault, and text-mode output is okay.
  - Allow AT option in ecpg DEALLOCATE statements.
    The infrastructure to support this has been there for awhile, but
    through an oversight there was still an error check rejecting the
  - Fix error in "contrib/intarray"'s int[] & int[] operator.
    If the smallest integer the two input arrays have in common is 1,
    and there are smaller values in either array, then 1 would be
    incorrectly omitted from the result.
  - Fix error detection in "contrib/pgcrypto"'s encrypt_iv() and
    These functions failed to report certain types of invalid-input
    errors, and would instead return random garbage values for
    incorrect input.
  - Fix one-byte buffer overrun in "contrib/test_parser".
    The code would try to read one more byte than it should, which
    would crash in corner cases. Since "contrib/test_parser" is only
    example code, this is not a security issue in itself, but bad
    example code is still bad.
  - Use __sync_lock_test_and_set() for spinlocks on ARM, if available.
    This function replaces our previous use of the SWPB instruction,
    which is deprecated and not available on ARMv6 and later. Reports
    suggest that the old code doesn't fail in an obvious way on recent
    ARM boards, but simply doesn't interlock concurrent accesses,
    leading to bizarre failures in multiprocess operation.
  - Use "-fexcess-precision=standard" option when building with gcc
    versions that accept it.
    This prevents assorted scenarios wherein recent versions of gcc
    will produce creative results.
  - Allow use of threaded Python on FreeBSD.
    Our configure script previously believed that this combination
    wouldn't work; but FreeBSD fixed the problem, so remove that error
* Drop 00git_inet_cidr_unpack.patch, 04-armel-tas.patch: applied upstream.

16. By Martin Pitt on 2011-10-04

* New upstream bug fix/security release: (LP: #866049)
  - Fix bugs in indexing of in-doubt HOT-updated tuples.
    These bugs could result in index corruption after reindexing a
    system catalog. They are not believed to affect user indexes.
  - Fix multiple bugs in GiST index page split processing.
    The probability of occurrence was low, but these could lead to
    index corruption.
  - Fix possible buffer overrun in tsvector_concat().
    The function could underestimate the amount of memory needed for
    its result, leading to server crashes.
  - Fix crash in xml_recv when processing a "standalone" parameter.
  - Make pg_options_to_table return NULL for an option with no value.
    Previously such cases would result in a server crash.
  - Avoid possibly accessing off the end of memory in "ANALYZE" and in
    SJIS-2004 encoding conversion.
    This fixes some very-low-probability server crash scenarios.
  - Prevent intermittent hang in interactions of startup process with
    bgwriter process.
    This affected recovery in non-hot-standby cases.
  - Fix race condition in relcache init file invalidation.
    There was a window wherein a new backend process could read a stale
    init file but miss the inval messages that would tell it the data
    is stale. The result would be bizarre failures in catalog accesses,
    typically "could not read block 0 in file ..." later during
  - Fix memory leak at end of a GiST index scan.
    Commands that perform many separate GiST index scans, such as
    verification of a new GiST-based exclusion constraint on a table
    already containing many rows, could transiently require large
    amounts of memory due to this leak.
  - Fix incorrect memory accounting (leading to possible memory bloat)
    in tuplestores supporting holdable cursors and plpgsql's RETURN
    NEXT command.
  - Fix performance problem when constructing a large, lossy bitmap.
  - Fix join selectivity estimation for unique columns.
    This fixes an erroneous planner heuristic that could lead to poor
    estimates of the result size of a join.
  - Fix nested PlaceHolderVar expressions that appear only in
    sub-select target lists. This mistake could result in outputs of an
    outer join incorrectly appearing as NULL.
  - Allow nested EXISTS queries to be optimized properly.
  - Fix array- and path-creating functions to ensure padding bytes are
    zeroes. This avoids some situations where the planner will think that
    semantically-equal constants are not equal, resulting in poor
  - Fix "EXPLAIN" to handle gating Result nodes within inner-indexscan
    subplans. The usual symptom of this oversight was "bogus varno" errors.
  - Work around gcc 4.6.0 bug that breaks WAL replay. This could lead to
    loss of committed transactions after a server crash.
  - Fix dump bug for VALUES in a view.
  - Disallow SELECT FOR UPDATE/SHARE on sequences.
    This operation doesn't work as expected and can lead to failures.
  - Fix "VACUUM" so that it always updates pg_class.reltuples/relpages.
    This fixes some scenarios where autovacuum could make increasingly
    poor decisions about when to vacuum tables.
  - Defend against integer overflow when computing size of a hash table.
  - Fix cases where "CLUSTER" might attempt to access already-removed
    TOAST data.
  - Fix portability bugs in use of credentials control messages for
    "peer" authentication.
  - Fix SSPI login when multiple roundtrips are required.
    The typical symptom of this problem was "The function requested is
    not supported" errors during SSPI login.
  - Throw an error if "pg_hba.conf" contains hostssl but SSL is
    disabled. This was concluded to be more user-friendly than the
    previous behavior of silently ignoring such lines.
  - Fix typo in pg_srand48 seed initialization.
    This led to failure to use all bits of the provided seed. This
    function is not used on most platforms (only those without
    srandom), and the potential security exposure from a
    less-random-than-expected seed seems minimal in any case.
  - Avoid integer overflow when the sum of LIMIT and OFFSET values
    exceeds 2^63.
  - Add overflow checks to int4 and int8 versions of generate_series().
  - Fix trailing-zero removal in to_char(). In a format with FM and no
    digit positions after the decimal point, zeroes to the left of the
    decimal point could be removed incorrectly.
  - Fix pg_size_pretty() to avoid overflow for inputs close to 2^63.
  - Weaken plpgsql's check for typmod matching in record values.
    An overly enthusiastic check could lead to discarding length
    modifiers that should have been kept.
  - Fix pg_upgrade to preserve toast tables' relfrozenxids during an
    upgrade from 8.3. Failure to do this could lead to "pg_clog" files
    being removed too soon after the upgrade.
  - Fix psql's counting of script file line numbers during COPY from a
    different file.
  - Fix pg_restore's direct-to-database mode for
    standard_conforming_strings. pg_restore could emit incorrect commands
    when restoring directly to a database server from an archive file that
    had been made with standard_conforming_strings set to on.
  - Be more user-friendly about unsupported cases for parallel
    pg_restore. This change ensures that such cases are detected and
    reported before any restore actions have been taken.
  - Fix write-past-buffer-end and memory leak in libpq's LDAP service
    lookup code.
  - In libpq, avoid failures when using nonblocking I/O and an SSL
  - Improve libpq's handling of failures during connection startup.
    In particular, the response to a server report of fork() failure
    during SSL connection startup is now saner.
  - Improve libpq's error reporting for SSL failures.
  - Fix PQsetvalue() to avoid possible crash when adding a new tuple to
    a PGresult originally obtained from a server query.
  - Make ecpglib write double values with 15 digits precision.
  - In ecpglib, be sure LC_NUMERIC setting is restored after an error.
  - Apply upstream fix for blowfish signed-character bug
    (CVE-2011-2483) (Closes: #631285)
    "contrib/pg_crypto"'s blowfish encryption code could give wrong
    results on platforms where char is signed (which is most), leading
    to encrypted passwords being weaker than they should be.
  - Fix memory leak in "contrib/seg".
  - Fix pgstatindex() to give consistent results for empty indexes.
  - Allow building with perl 5.14. (Closes: #628503)

15. By Martin Pitt on 2011-02-01

* New upstream security/bug fix release: (LP: #711318)
  - Fix buffer overrun in "contrib/intarray"'s input function for the
    query_int type.
    This bug is a security risk since the function's return address
    could be overwritten. Thanks to Apple Inc's security team for
    reporting this issue and supplying the fix. (CVE-2010-4015)
  - Avoid failures when "EXPLAIN" tries to display a simple-form CASE
    If the CASE's test expression was a constant, the planner could
    simplify the CASE into a form that confused the expression-display
    code, resulting in "unexpected CASE WHEN clause" errors.
  - Fix assignment to an array slice that is before the existing range
    of subscripts.
    If there was a gap between the newly added subscripts and the first
    pre-existing subscript, the code miscalculated how many entries
    needed to be copied from the old array's null bitmap, potentially
    leading to data corruption or crash.
  - Avoid unexpected conversion overflow in planner for very distant
    date values.
    The date type supports a wider range of dates than can be
    represented by the timestamp types, but the planner assumed it
    could always convert a date to timestamp with impunity.
  - Fix pg_restore's text output for large objects (BLOBs) when
    standard_conforming_strings is on.
    Although restoring directly to a database worked correctly, string
    escaping was incorrect if pg_restore was asked for SQL text output
    and standard_conforming_strings had been enabled in the source
  - Fix erroneous parsing of tsquery values containing ... &
    !(subexpression) | ... .
    Queries containing this combination of operators were not executed
    correctly. The same error existed in "contrib/intarray"'s query_int
    type and "contrib/ltree"'s ltxtquery type.
  - Fix bug in "contrib/seg"'s GiST picksplit algorithm.
    This could result in considerable inefficiency, though not actually
    incorrect answers, in a GiST index on a seg column. If you have
    such an index, consider "REINDEX"ing it after installing this
    update. (This is identical to the bug that was fixed in
    "contrib/cube" in the previous update.)

14. By Martin Pitt on 2010-10-05

* New upstream security/bug fix update: (LP: #655293)
  - Use a separate interpreter for each calling SQL userid in PL/Perl
    and PL/Tcl.
    This change prevents security problems that can be caused by
    subverting Perl or Tcl code that will be executed later in the same
    session under another SQL user identity (for example, within a
    SECURITY DEFINER function). Most scripting languages offer numerous
    ways that that might be done, such as redefining standard functions
    or operators called by the target function. Without this change,
    any SQL user with Perl or Tcl language usage rights can do
    essentially anything with the SQL privileges of the target
    function's owner.
    The cost of this change is that intentional communication among
    Perl and Tcl functions becomes more difficult. To provide an escape
    hatch, PL/PerlU and PL/TclU functions continue to use only one
    interpreter per session. This is not considered a security issue
    since all such functions execute at the trust level of a database
    superuser already.
    It is likely that third-party procedural languages that claim to
    offer trusted execution have similar security issues. We advise
    contacting the authors of any PL you are depending on for
    security-critical purposes.
    Our thanks to Tim Bunce for pointing out this issue
  - Prevent possible crashes in pg_get_expr() by disallowing it from
    being called with an argument that is not one of the system catalog
    columns it's intended to be used with.
  - Fix incorrect placement of placeholder evaluation.
    This bug could result in query outputs being non-null when they
    should be null, in cases where the inner side of an outer join is a
    sub-select with non-strict expressions in its output list.
  - Fix possible duplicate scans of UNION ALL member relations.
  - Fix "cannot handle unplanned sub-select" error.
    This occurred when a sub-select contains a join alias reference
    that expands into an expression containing another sub-select.
  - Fix mishandling of whole-row Vars that reference a view or
    sub-select and appear within a nested sub-select.
  - Fix mishandling of cross-type IN comparisons.
    This could result in failures if the planner tried to implement an
    IN join with a sort-then-unique-then-plain-join plan.
  - Fix computation of "ANALYZE" statistics for tsvector columns.
    The original coding could produce incorrect statistics, leading to
    poor plan choices later.
  - Improve planner's estimate of memory used by array_agg(),
    string_agg(), and similar aggregate functions.
    The previous drastic underestimate could lead to out-of-memory
    failures due to inappropriate choice of a hash-aggregation plan.
  - Fix failure to mark cached plans as transient.
    If a plan is prepared while "CREATE INDEX CONCURRENTLY" is in
    progress for one of the referenced tables, it is supposed to be
    re-planned once the index is ready for use. This was not happening
  - Reduce PANIC to ERROR in some occasionally-reported btree failure
    cases, and provide additional detail in the resulting error
    This should improve the system's robustness with corrupted indexes.
  - Fix incorrect search logic for partial-match queries with GIN
    Cases involving AND/OR combination of several GIN index conditions
    didn't always give the right answer, and were sometimes much slower
    than necessary.
  - Prevent show_session_authorization() from crashing within
    autovacuum processes.
  - Defend against functions returning setof record where not all the
    returned rows are actually of the same rowtype.
  - Fix possible corruption of pending trigger event lists during
    subtransaction rollback.
    This could lead to a crash or incorrect firing of triggers.
  - Fix possible failure when hashing a pass-by-reference function
  - Improve merge join's handling of NULLs in the join columns.
    A merge join can now stop entirely upon reaching the first NULL, if
    the sort order is such that NULLs sort high.
  - Take care to fsync the contents of lockfiles (both "postmaster.pid"
    and the socket lockfile) while writing them.
    This omission could result in corrupted lockfile contents if the
    machine crashes shortly after postmaster start. That could in turn
    prevent subsequent attempts to start the postmaster from
    succeeding, until the lockfile is manually removed.
  - Avoid recursion while assigning XIDs to heavily-nested
    The original coding could result in a crash if there was limited
    stack space.
  - Avoid holding open old WAL segments in the walwriter process.
    The previous coding would prevent removal of no-longer-needed
  - Fix log_line_prefix's %i escape, which could produce junk early in
    backend startup.
  - Prevent misinterpretation of partially-specified relation options
    for TOAST tables.
    In particular, fillfactor would be read as zero if any other
    reloption had been set for the table, leading to serious bloat.
  - Fix inheritance count tracking in "ALTER TABLE ... ADD CONSTRAINT"
  - Fix possible data corruption in "ALTER TABLE ... SET TABLESPACE"
    when archiving is enabled.
    be interrupted by query-cancel.
  - Improve "CREATE INDEX"'s checking of whether proposed index
    expressions are immutable.
  - Fix "REASSIGN OWNED" to handle operator classes and families.
  - Fix possible core dump when comparing two empty tsquery values.
  - Fix LIKE's handling of patterns containing % followed by _.
    We've fixed this before, but there were still some
    incorrectly-handled cases.
  - Re-allow input of Julian dates prior to 0001-01-01 AD.
    Input such as 'J100000'::date worked before 8.4, but was
    unintentionally broken by added error-checking.
  - Fix PL/pgSQL to throw an error, not crash, if a cursor is closed
    within a FOR loop that is iterating over that cursor.
  - In PL/Python, defend against null pointer results from
    PyCObject_AsVoidPtr and PyCObject_FromVoidPtr.
  - In libpq, fix full SSL certificate verification for the case where
    both host and hostaddr are specified.
  - Make psql recognize "DISCARD ALL" as a command that should not be
    encased in a transaction block in autocommit-off mode.
  - Fix some issues in pg_dump's handling of SQL/MED objects.
    Notably, pg_dump would always fail if run by a non-superuser, which
    was not intended.
  - Improve pg_dump and pg_restore's handling of non-seekable archive
    This is important for proper functioning of parallel restore.
  - Improve parallel pg_restore's ability to cope with selective
    restore (-L option).
    The original code tended to fail if the -L file commanded a
    non-default restore ordering.
  - Fix ecpg to process data from RETURNING clauses correctly.
  - Fix some memory leaks in ecpg.
  - Improve "contrib/dblink"'s handling of tables containing dropped
  - Fix connection leak after "duplicate connection name" errors in
  - Fix "contrib/dblink" to handle connection names longer than 62
    bytes correctly.
  - Add hstore(text, text) function to "contrib/hstore".
    This function is the recommended substitute for the now-deprecated
    => operator. It was back-patched so that future-proofed code can be
    used with older server versions. Note that the patch will be
    effective only after "contrib/hstore" is installed or reinstalled
    in a particular database. Users might prefer to execute the "CREATE
    FUNCTION" command by hand, instead.
  - Update build infrastructure and documentation to reflect the source
    code repository's move from CVS to Git.
* debian/postgresql-8.4.preinst: Add missing debhelper token.
* debian/control: Bump Standards-Version to 3.9.1 (no changes necessary).

13. By Martin Pitt on 2010-07-19

* Migrate to a common init script for all server versions, to avoid
  providing the "postgresql" service in multiple packages (which causes
  insserv to complain bitterly):
  - Drop debian/postgresql-8.4.init.
  - debian/control: Bump dependency to postgresql-common to ensure we have a
    common /etc/init.d/postgresql init script.
  - debian/postgresql-8.4.preinst: Remove/rename our init script on upgrade.
  - debian/postgresql-8.4.prerm: Call stop_version on upgrade.
  - debian/rules: Drop dh_installinit arguments.
  - (Closes: #585890)

12. By Martin Pitt on 2010-05-15

* Urgency medium due to security fixes.
* New upstream security/bug fix release:
  - Enforce restrictions in plperl using an opmask applied to the whole
    interpreter, instead of using "Safe.pm".
    Recent developments have convinced us that "Safe.pm" is too
    insecure to rely on for making plperl trustable. This change
    removes use of "Safe.pm" altogether, in favor of using a separate
    interpreter with an opcode mask that is always applied. Pleasant
    side effects of the change include that it is now possible to use
    Perl's strict pragma in a natural way in plperl, and that Perl's $a
    and $b variables work as expected in sort routines, and that
    function compilation is significantly faster. (CVE-2010-1169)
  - Prevent PL/Tcl from executing untrustworthy code from pltcl_modules.
    PL/Tcl's feature for autoloading Tcl code from a database table
    could be exploited for trojan-horse attacks, because there was no
    restriction on who could create or insert into that table. This
    change disables the feature unless pltcl_modules is owned by a
    superuser. (However, the permissions on the table are not checked,
    so installations that really need a less-than-secure modules table
    can still grant suitable privileges to trusted non-superusers.)
    Also, prevent loading code into the unrestricted "normal" Tcl
    interpreter unless we are really going to execute a pltclu
    function. (CVE-2010-1170)
  - Fix data corruption during WAL replay of ALTER ... SET TABLESPACE.
    When archive_mode is on, ALTER ... SET TABLESPACE generates a WAL
    record whose replay logic was incorrect. It could write the data to
    the wrong place, leading to possibly-unrecoverable data corruption.
    Data corruption would be observed on standby slaves, and could
    occur on the master as well if a database crash and recovery
    occurred after committing the ALTER and before the next checkpoint.
  - Fix possible crash if a cache reset message is received during
    rebuild of a relcache entry.
    This error was introduced in 8.4.3 while fixing a related failure.
  - Apply per-function GUC settings while running the language
    validator for the function. This avoids failures if the function's code
    is invalid without the setting; an example is that SQL functions may not
    parse if the search_path is not correct.
  - Do constraint exclusion for inherited "UPDATE" and "DELETE" target
    tables when constraint_exclusion = partition.
    Due to an oversight, this setting previously only caused constraint
    exclusion to be checked in "SELECT" commands.
  - Do not allow an unprivileged user to reset superuser-only parameter
    Previously, if an unprivileged user ran ALTER USER ... RESET ALL
    for himself, or ALTER DATABASE ... RESET ALL for a database he
    owns, this would remove all special parameter settings for the user
    or database, even ones that are only supposed to be changeable by a
    superuser. Now, the "ALTER" will only remove the parameters that
    the user has permission to change.
  - Avoid possible crash during backend shutdown if shutdown occurs
    when a CONTEXT addition would be made to log entries.
    In some cases the context-printing function would fail because the
    current transaction had already been rolled back when it came time
    to print a log message.
  - Fix erroneous handling of %r parameter in recovery_end_command.
    The value always came out zero.
  - Ensure the archiver process responds to changes in archive_command
    as soon as possible.
  - Fix pl/pgsql's CASE statement to not fail when the case expression
    is a query that returns no rows.
  - Update pl/perl's "ppport.h" for modern Perl versions.
  - Fix assorted memory leaks in pl/python.
  - Handle empty-string connect parameters properly in ecpg.
  - Prevent infinite recursion in psql when expanding a variable that
    refers to itself.
  - Fix psql's \copy to not add spaces around a dot within \copy
    (select ...).
    Addition of spaces around the decimal point in a numeric literal
    would result in a syntax error.
  - Avoid formatting failure in psql when running in a locale context
    that doesn't match the client_encoding.
  - Fix unnecessary "GIN indexes do not support whole-index scans"
    errors for unsatisfiable queries using "contrib/intarray" operators.
  - Ensure that "contrib/pgstattuple" functions respond to cancel
    interrupts promptly.

11. By Martin Pitt on 2010-03-13

* New upstream bug fix release:
  - Add new configuration parameter ssl_renegotiation_limit to control
    how often we do session key renegotiation for an SSL connection.
    This can be set to zero to disable renegotiation completely, which
    may be required if a broken SSL library is used. In particular,
    some vendors are shipping stopgap patches for CVE-2009-3555 that
    cause renegotiation attempts to fail.
  - Fix possible deadlock during backend startup.
  - Fix possible crashes due to not handling errors during relcache
    reload cleanly.
  - Fix possible crash due to use of dangling pointer to a cached plan.
  - Fix possible crash due to overenthusiastic invalidation of cached
    plan for "ROLLBACK".
  - Fix possible crashes when trying to recover from a failure in
    subtransaction start.
  - Fix server memory leak associated with use of savepoints and a
    client encoding different from server's encoding.
  - Fix incorrect WAL data emitted during end-of-recovery cleanup of a
    GIST index page split.
  - Fix bug in WAL redo cleanup method for GIN indexes.
  - Fix incorrect comparison of scan key in GIN index search.
  - Make substring() for bit types treat any negative length as meaning
    "all the rest of the string". The previous coding treated only -1 that
    way, and would produce an invalid result value for other negative
    values, possibly leading to a crash (CVE-2010-0442).
  - Fix integer-to-bit-string conversions to handle the first
    fractional byte correctly when the output bit width is wider than
    the given integer by something other than a multiple of 8 bits.
  - Fix some cases of pathologically slow regular expression matching.
  - Fix bug occurring when trying to inline a SQL function that returns
    a set of a composite type that contains dropped columns.
  - Fix bug with trying to update a field of an element of a
    composite-type array column.
  - Avoid failure when "EXPLAIN" has to print a FieldStore or
    assignment ArrayRef expression.
    These cases can arise now that "EXPLAIN VERBOSE" tries to print
    plan node target lists.
  - Avoid an unnecessary coercion failure in some cases where an
    undecorated literal string appears in a subquery within
    This fixes a regression for some cases that worked before 8.4.
  - Avoid undesirable rowtype compatibility check failures in some
    cases where a whole-row Var has a rowtype that contains dropped
  - Fix the STOP WAL LOCATION entry in backup history files to report
    the next WAL segment's name when the end location is exactly at a
    segment boundary.
  - Always pass the catalog ID to an option validator function
  - Fix some more cases of temporary-file leakage.
    This corrects a problem introduced in the previous minor release.
    One case that failed is when a plpgsql function returning set is
    called within another function's exception handler.
  - Add support for doing FULL JOIN ON FALSE.
    This prevents a regression from pre-8.4 releases for some queries
    that can now be simplified to a constant-false join condition.
  - Improve constraint exclusion processing of boolean-variable cases,
    in particular make it possible to exclude a partition that has a
    "bool_column = false" constraint.
  - Prevent treating an INOUT cast as representing binary compatibility.
  - Include column name in the message when warning about inability to
    grant or revoke column-level privileges.
    This is more useful than before and helps to prevent confusion when
    a "REVOKE" generates multiple messages, which formerly appeared to
    be duplicates.
  - When reading "pg_hba.conf" and related files, do not treat
    @something as a file inclusion request if the @ appears inside
    quote marks; also, never treat @ by itself as a file inclusion
    This prevents erratic behavior if a role or database name starts
    with @. If you need to include a file whose path name contains
    spaces, you can still do so, but you must write @"/path to/file"
    rather than putting the quotes around the whole construct.
  - Prevent infinite loop on some platforms if a directory is named as
    an inclusion target in "pg_hba.conf" and related files.
  - Fix possible infinite loop if SSL_read or SSL_write fails without
    setting errno.
    This is reportedly possible with some Windows versions of openssl.
  - Disallow GSSAPI authentication on local connections, since it
    requires a hostname to function correctly.
  - Protect ecpg against applications freeing strings unexpectedly.
  - Make ecpg report the proper SQLSTATE if the connection disappears.
  - Fix translation of cell contents in psql \d output.
  - Fix psql's numericlocale option to not format strings it shouldn't
    in latex and troff output formats.
  - Fix a small per-query memory leak in psql.
  - Make psql return the correct exit status (3) when ON_ERROR_STOP and
    --single-transaction are both specified and an error occurs during
    the implied "COMMIT".
  - Fix pg_dump's output of permissions for foreign servers.
  - Fix possible crash in parallel pg_restore due to out-of-range
    dependency IDs.
  - Fix plpgsql failure in one case where a composite column is set to
  - Fix possible failure when calling PL/Perl functions from PL/PerlU
    or vice versa.
  - Add volatile markings in PL/Python to avoid possible
    compiler-specific misbehavior>
  - Ensure PL/Tcl initializes the Tcl interpreter.
    The only known symptom of this oversight is that the Tcl clock
    command misbehaves if using Tcl 8.5 or later.
  - Prevent ExecutorEnd from being run on portals created within a
    failed transaction or subtransaction.
    This is known to cause issues when using "contrib/auto_explain".
  - Prevent crash in "contrib/dblink" when too many key columns are
    specified to a dblink_build_sql_- function.
  - Allow zero-dimensional arrays in "contrib/ltree" operations.
    This case was formerly rejected as an error, but it's more
    convenient to treat it the same as a zero-element array. In
    particular this avoids unnecessary failures when an ltree operation
    is applied to the result of ARRAY(SELECT ...) and the sub-select
    returns no rows.
  - Fix assorted crashes in "contrib/xml2" caused by sloppy memory
* Rebuild against libossp-uuid16. (Closes: #570108, LP: #538284)

10. By Martin Pitt on 2010-03-13

Rebuild against libossp-uuid16. (Closes: #570108, LP: #538284)

9. By Martin Pitt on 2010-01-19

[ Alexander Sack ]
* Add 04-armel-tas.patch: Fix ftbfs on armel: Use gcc intrinsics rather
  than assembler to implement tas (test and set). (LP: #497331)

[ Martin Pitt ]
* Drop 15-dict-fallback-dir.patch: p-common 104 now directly creates the
  names tsearch is looking for. Bump p-common dependency accordingly.

8. By Martin Pitt on 2009-12-14

Medium urgency due to security fixes.

[ Peter Eisentraut ]
* debian/control: Added Homepage
* debian/control: Added ${misc:Depends} on all packages, per lintian
* debian/control: Added versioned dependencies on the shared libraries used
  by the libecpg-dev package
* debian/control: Removed obsolete build dependency bzip2
* debian/control: Added Vcs fields

[ Martin Pitt ]
* New upstream security/bug fix release:
  - Protect against indirect security threats caused by index functions
    changing session-local state. This change prevents allegedly-immutable
    index functions from possibly subverting a superuser's session
  - Reject SSL certificates containing an embedded null byte in the
    common name (CN) field. This prevents unintended matching of a
    certificate to a server or client name during SSL validation
  - Fix hash index corruption. The 8.4 change that made hash indexes keep
    entries sorted by hash value failed to update the bucket splitting and
    compaction routines to preserve the ordering. So application of either
    of those operations could lead to permanent corruption of an index, in
    the sense that searches might fail to find entries that are present. To
    deal with this, it is recommended to REINDEX any hash indexes you may
    have after installing this update.
  - Fix possible crash during backend-startup-time cache initialization.
  - Avoid crash on empty thesaurus dictionary.
  - Prevent signals from interrupting VACUUM at unsafe times.
  - Fix possible crash due to integer overflow in hash table size
  - Fix crash if a DROP is attempted on an internally-dependent object.
  - Fix very rare crash in inet/cidr comparisons.
  - Ensure that shared tuple-level locks held by prepared transactions
    are not ignored.
  - Fix premature drop of temporary files used for a cursor that is
    accessed within a subtransaction.
  - Fix memory leak in syslogger process when rotating to a new CSV
  - Fix memory leak in postmaster when re-parsing "pg_hba.conf".
  - Make FOR UPDATE/SHARE in the primary query not propagate into WITH
  - Fix bug with a WITH RECURSIVE query immediately inside another one.
  - Fix concurrency bug in hash indexes.
  - Fix incorrect logic for GiST index page splits, when the split
    depends on a non-first column of the index.
  - Fix wrong search results for a multi-column GIN index with
    fastupdate enabled.
  - Fix bugs in WAL entry creation for GIN indexes.
  - Don't error out if recycling or removing an old WAL file fails at
    the end of checkpoint.
  - Fix PAM password processing to be more robust.
    The previous code is known to fail with the combination of the
    Linux pam_krb5 PAM module with Microsoft Active Directory as the
    domain controller. It might have problems elsewhere too, since it
    was making unjustified assumptions about what arguments the PAM
    stack would pass to it.
  - Raise the maximum authentication token (Kerberos ticket) size in
    GSSAPI and SSPI authentication methods. While the old 2000-byte limit
    was more than enough for Unix Kerberos implementations, tickets issued
    by Windows Domain Controllers can be much larger.
  - Ensure that domain constraints are enforced in constructs like
    ARRAY[...]::domain, where the domain is over an array type.
  - Fix foreign-key logic for some cases involving composite-type
    columns as foreign keys.
  - Ensure that a cursor's snapshot is not modified after it is created.
  - Fix CREATE TABLE to properly merge default expressions coming from
    different inheritance parent tables. This used to work but was broken in
  - Re-enable collection of access statistics for sequences. This used to
    work but was broken in 8.3.
  - Fix processing of ownership dependencies during CREATE OR REPLACE
  - Fix incorrect handling of WHERE "x"="x" conditions.
    In some cases these could get ignored as redundant, but they aren't
    -- they're equivalent to "x" IS NOT NULL.
  - Fix incorrect plan construction when using hash aggregation to
    implement DISTINCT for textually identical volatile expressions
  - Fix Assert failure for a volatile SELECT DISTINCT ON expression
  - Fix ts_stat() to not fail on an empty tsvector value
  - Make text search parser accept underscores in XML attributes
  - Fix encoding handling in xml binary input.
    If the XML header doesn't specify an encoding, we now assume UTF-8
    by default; the previous handling was inconsistent.
  - Fix bug with calling plperl from plperlu or vice versa.
  - Fix session-lifespan memory leak when a PL/Perl function is
  - Ensure that Perl arrays are properly converted to PostgreSQL arrays
    when returned by a set-returning PL/Perl function.
  - Fix rare crash in exception processing in PL/Python.
  - Fix ecpg problem with comments in DECLARE CURSOR statements
  - Fix ecpg to not treat recently-added keywords as reserved words
    This affected the keywords CALLED, CATALOG, DEFINER, ENUM,
  - Re-allow regular expression special characters in psql's \df
    function name parameter.
  - Put FREEZE and VERBOSE options in the right order in the VACUUM
    command that "contrib/vacuumdb" produces.
  - Fix possible leak of connections when "contrib/dblink" encounters
    an error
  - Make the postmaster ignore any application_name parameter in
    connection request packets, to improve compatibility with future
    libpq versions.
* debian/control: libreadline5-dev → libreadline-dev. (Closes: #553831)
* Add 03-sh-architecture.patch: Support Renesas' SuperH architecture, thanks
  Nobuhiro Iwamatsu! (Closes: #548847)

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