Tom Lane [Tue, 14 Jun 2005 14:21:31 +0000 (14:21 +0000)]
The random selection in function linear() could deliver a value equal to max
if geqo_rand() returns exactly 1.0, resulting in failure due to indexing
off the end of the pool array. Also, since this is using inexact float math,
it seems wise to guard against roundoff error producing values slightly
outside the expected range. Per report from bug@zedware.org.
Tom Lane [Thu, 2 Jun 2005 21:04:08 +0000 (21:04 +0000)]
Push enable/disable of notify and catchup interrupts all the way down
to just around the bare recv() call that gets a command from the client.
The former placement in PostgresMain was unsafe because the intermediate
processing layers (especially SSL) use facilities such as malloc that are
not necessarily re-entrant. Per report from counterstorm.com.
Tom Lane [Tue, 31 May 2005 19:10:57 +0000 (19:10 +0000)]
Add test to WAL replay to verify that xl_prev points back to the previous
WAL record; this is necessary to be sure we recognize stale WAL records
when a WAL page was only partially written during a system crash.
Tom Lane [Sun, 29 May 2005 17:10:52 +0000 (17:10 +0000)]
expandRTE and get_rte_attribute_type mistakenly always imputed typmod -1
to columns of an RTE that was a function returning RECORD with a column
definition list. Apparently no one has tried to use non-default typmod
with a function returning RECORD before.
Neil Conway [Thu, 26 May 2005 02:14:32 +0000 (02:14 +0000)]
Adjust datetime parsing to be more robust. We now pass the length of the
working buffer into ParseDateTime() and reject too-long input there,
rather than checking the length of the input string before calling
ParseDateTime(). The old method was bogus because ParseDateTime() can use
a variable amount of working space, depending on the content of the
input string (e.g. how many fields need to be NUL terminated). This fixes
a minor stack overrun -- I don't _think_ it's exploitable, although I
won't claim to be an expert.
Along the way, fix a bug reported by Mark Dilger: the working buffer
allocated by interval_in() was too short, which resulted in rejecting
some perfectly valid interval input values. I added a regression test for
this fix.
Tatsuo Ishii [Tue, 24 May 2005 23:15:05 +0000 (23:15 +0000)]
Inserting 5 characters into char(10) does not produce 5 padding spaces
if they are two-byte multibyte characters. Same thing can be happen
if octet_length(multibyte_chars) == n where n is char(n).
Long standing bug since 7.3 days. Per report and fix from Yoshiyuki Asaba.
Tom Lane [Tue, 24 May 2005 18:03:24 +0000 (18:03 +0000)]
Previous fix for "x FULL JOIN y ON true" failed to handle the case
where there was also a WHERE-clause restriction that applied to the
join. The check on restrictlist == NIL is really unnecessary anyway,
because select_mergejoin_clauses already checked for and complained
about any unmergejoinable join clauses. So just take it out.
Tom Lane [Sat, 7 May 2005 21:33:21 +0000 (21:33 +0000)]
Repair very-low-probability race condition between relation extension
and VACUUM: in the interval between adding a new page to the relation
and formatting it, it was possible for VACUUM to come along and decide
it should format the page too. Though not harmful in itself, this would
cause data loss if a third transaction were able to insert tuples into
the vacuumed page before the original extender got control back.
Tom Lane [Sat, 7 May 2005 21:23:02 +0000 (21:23 +0000)]
Adjust time qual checking code so that we always check TransactionIdIsInProgress
before we check commit/abort status. Formerly this was done in some paths
but not all, with the result that a transaction might be considered
committed for some purposes before it became committed for others.
Per example found by Jan Wieck.
Tom Lane [Tue, 3 May 2005 19:18:31 +0000 (19:18 +0000)]
Alter the signature for encoding conversion functions to declare the
output area as INTERNAL not CSTRING. This is to prevent people from
calling the functions by hand. This is a permanent solution for the
back branches but I hope it is just a stopgap for HEAD.
Tom Lane [Tue, 3 May 2005 16:51:45 +0000 (16:51 +0000)]
Change tsearch2 to not use the unsafe practice of creating functions
that return INTERNAL without also having INTERNAL arguments. Since the
functions in question aren't meant to be called by hand anyway, I just
redeclared them to take 'internal' instead of 'text'. Also add code
to ProcedureCreate() to enforce the restriction, as I should have done
to start with :-(
Neil Conway [Sat, 30 Apr 2005 08:36:18 +0000 (08:36 +0000)]
GCC 4.0 includes a new warning option, -Wformat-literal, that emits
a warning when a variable is used as a format string for printf()
and similar functions (if the variable is derived from untrusted
data, it could include unexpected formatting sequences). This
emits too many warnings to be enabled by default, but it does
flag a few dubious constructs in the Postgres tree. This patch
fixes up the obvious variants: functions that are passed a variable
format string but no additional arguments.
Most of these are harmless (e.g. the ruleutils stuff), but there
is at least one actual bug here: if you create a trigger named
"%sfoo", pg_dump will read uninitialized memory and fail to dump
the trigger correctly.
Neil Conway [Sat, 30 Apr 2005 08:00:55 +0000 (08:00 +0000)]
This patch fixes a bug in the error message emitted by pg_restore on an
incorrect -F argument: write_msg() expects its first parameter to be a
"module name", not the format string.
Tom Lane [Sat, 23 Apr 2005 22:53:44 +0000 (22:53 +0000)]
Repair two TIME WITH TIME ZONE bugs found by Dennis Vshivkov. Comparison
of timetz values misbehaved in --enable-integer-datetime cases, and
EXTRACT(EPOCH) subtracted the zone instead of adding it in all cases.
Backpatch to all supported releases (except --enable-integer-datetime code
does not exist in 7.2).
Updatable ResultSets need to check for an empty ResultSet because
isBeforeFirst and isAfterLast both return false for an empty result
so the checking to make sure the user is on a valid row wasn't
working.
Also don't allow an insert without specifying at least one column
value because INSERT INTO tab() values() is a syntax error.
When moveToCurrentRow is called and the current row is off the
end of the ResultSet we can't try to load that row because it
doesn't exist and will throw an Exception.
Tom Lane [Thu, 14 Apr 2005 21:44:35 +0000 (21:44 +0000)]
Don't try to constant-fold functions returning RECORD, since the optimizer
isn't presently set up to pass them an expected tuple descriptor. Bug has
been there since 7.3 but was just recently reported by Thomas Hallgren.
Tom Lane [Sun, 10 Apr 2005 20:58:03 +0000 (20:58 +0000)]
Make constant-folding produce sane output for COALESCE(NULL,NULL),
that is a plain NULL and not a COALESCE with no inputs. Fixes crash
reported by Michael Williamson.
Tom Lane [Thu, 31 Mar 2005 23:21:32 +0000 (23:21 +0000)]
Flush any remaining statistics counts out to the collector at process
exit. Without this, operations triggered during backend exit (such as
temp table deletions) won't be counted ... which given heavy usage of
temp tables can lead to pg_autovacuum falling way behind on the need
to vacuum pg_class and pg_attribute. Per reports from Steve Crawford
and others.
Tom Lane [Thu, 24 Mar 2005 21:51:04 +0000 (21:51 +0000)]
array_map can't use the fn_extra field of the provided fcinfo struct as
its private storage, because that belongs to the function that it is
supposed to call. Per report from Ezequiel Tolnay.
Tom Lane [Wed, 23 Mar 2005 19:07:03 +0000 (19:07 +0000)]
Previous "64-bit fix" for intagg didn't actually work. This is already
fixed properly in CVS tip, but we need a band-aid for back branches.
Per report from Ron Mayer.
Tom Lane [Sat, 12 Mar 2005 21:12:18 +0000 (21:12 +0000)]
Fix ALTER DATABASE RENAME to allow the operation if user is a superuser
who for some reason isn't marked usecreatedb. Per report from Alexander
Pravking. Also fix sloppy coding in have_createdb_privilege().
Neil Conway [Sat, 12 Mar 2005 06:55:14 +0000 (06:55 +0000)]
Some builds (depends on crypto engine support?) of OpenSSL
0.9.7x have EVP_DigestFinal function which which clears all of
EVP_MD_CTX. This makes pgcrypto crash in functions which
re-use one digest context several times: hmac() and crypt()
with md5 algorithm.
Following patch fixes it by carring the digest info around
EVP_DigestFinal and re-initializing cipher.
Tom Lane [Tue, 1 Mar 2005 21:15:26 +0000 (21:15 +0000)]
Release proclock immediately in RemoveFromWaitQueue() if it represents
no held locks. This maintains the invariant that proclocks are present
only for procs that are holding or awaiting a lock; when this is not
true, LockRelease will fail. Per report from Stephen Clouse.
Tom Lane [Sat, 19 Feb 2005 19:33:42 +0000 (19:33 +0000)]
Ensure that the resolved datatype of any unknown Param is propagated
into the sub-SELECT targetlist when it appears in the context
INSERT INTO foo SELECT $1 ... Per report from Abhijit Menon-Sen.
Neil Conway [Mon, 7 Feb 2005 03:55:28 +0000 (03:55 +0000)]
Prevent 4 more buffer overruns in the PL/PgSQL parser. This is just a
minimally-invasive fix for stable branches; a cleaner fix will be
committed to HEAD soon.
Tom Lane [Sun, 6 Feb 2005 20:19:42 +0000 (20:19 +0000)]
Repair CLUSTER failure after ALTER TABLE SET WITHOUT OIDS. Turns out
there are corner cases involving dropping toasted columns in which the
previous coding would fail, too: the new version of the table might not
have any TOAST table, but we'd still propagate possibly-wide values of
dropped columns forward.
Tom Lane [Wed, 26 Jan 2005 17:09:21 +0000 (17:09 +0000)]
Back-patch 8.0 version of plperl_hash_from_tuple() into prior releases
to fix failure to cope with quote marks in field values; not to mention
that it is shorter and faster. Per report from Charles Haron.
Tom Lane [Sun, 23 Jan 2005 02:23:30 +0000 (02:23 +0000)]
The result of a FULL or RIGHT join can't be assumed to be sorted by the
left input's sorting, because null rows may be inserted at various points.
Per report from Ferenc Lutischá¸n.
Neil Conway [Fri, 21 Jan 2005 00:31:21 +0000 (00:31 +0000)]
Prevent overrunning a heap-allocated buffer if more than 1024 parameters
to a refcursor declaration are specified. This is a minimally-invasive fix
for the buffer overrun -- a more thorough cleanup will be checked into
HEAD.
Tom Lane [Thu, 23 Dec 2004 22:42:32 +0000 (22:42 +0000)]
Avoid memory leakage during VACUUM FULL when an index expression or
index predicate uses temporary memory for evaluation. Per example
from Jean-Gerard Pailloncy.
Tom Lane [Fri, 3 Dec 2004 21:26:52 +0000 (21:26 +0000)]
Use StrNCpy not strncpy to fill hash key, to ensure the resulting key
is null-terminated. I think this is not a real bug because the parser
would always have truncated the identifier to NAMEDATALEN-1 already,
but let's be safe. Per report from Klocwork.
Tom Lane [Thu, 2 Dec 2004 02:45:24 +0000 (02:45 +0000)]
Teach regex_fixed_prefix() the correct handling of advanced regex
escapes --- they aren't simply quoted characters. Problem noted by
Antti Salmela. Also fix problem with incorrect handling of multibyte
characters when followed by a quantifier.
Tom Lane [Sun, 28 Nov 2004 22:16:49 +0000 (22:16 +0000)]
Avoid scribbling on original parsetree during DECLARE CURSOR. This
prevents problems when the DECLARE is in a portal and is executed
repeatedly, as is possible in v3 protocol. Per analysis by Oliver
Jowett, though I didn't use his patch exactly.
Tom Lane [Wed, 24 Nov 2004 22:57:09 +0000 (22:57 +0000)]
Install Tcl regex fixes to sync our regex engine with Tcl 8.4.8 (up from
8.4.1). This corrects some curious regex bugs, though not the greediness
issue I was hoping to find a solution for :-(
Tom Lane [Wed, 24 Nov 2004 22:44:27 +0000 (22:44 +0000)]
Our interface code for Spencer's regexp package was checking for regexp
error conditions during regexp compile, but not during regexp execution;
any sort of "can't happen" errors would be treated as no-match instead
of being reported as they should be. Noticed while trying to duplicate
a reported Tcl bug.
Tom Lane [Thu, 18 Nov 2004 01:19:40 +0000 (01:19 +0000)]
Back-patch fix for ALTER DATABASE failing to flush pg_database changes
to disk right away. This is just a one-liner change rather than trying
to use FlushRelationBuffers().
Neil Conway [Wed, 17 Nov 2004 00:18:26 +0000 (00:18 +0000)]
Backpatch fix from HEAD:
Prevent a backend crash when processing CREATE TABLE commands with
more than 65K columns, or when the created table has more than 65K columns
due to adding inherited columns from parent relations. Fix a similar
crash when processing SELECT queries with more than 65K target list
entries. In all three cases we would eventually detect the error and
elog, but the check was being made too late.
Tom Lane [Tue, 9 Nov 2004 20:35:16 +0000 (20:35 +0000)]
In PGSharedMemoryIsInUse, assume that EACCES indicates a shmem segment
that is of no concern to us --- it must belong to a different userid,
which means it is not a Postgres shmem segment (or at least,
not one that is relevant to our data directory). I plan a more extensive
fix in HEAD, but this is a simple change that prevents failure-to-reboot
problems for single-postmaster installations.
Tom Lane [Fri, 22 Oct 2004 00:24:27 +0000 (00:24 +0000)]
Prevent pg_ctl from being run as root. Since it uses configuration files
owned by postgres, doing "pg_ctl start" as root could allow a privilege
escalation attack, as pointed out by iDEFENSE. Of course the postmaster would
fail, but we ought to fail a little sooner to protect sysadmins unfamiliar
with Postgres. The chosen fix is to disable root use of pg_ctl in all cases,
just to be confident there are no other holes.