Peter Eisentraut [Fri, 8 Apr 2016 17:48:14 +0000 (13:48 -0400)]
Distrust external OpenSSL clients; clear err queue
OpenSSL has an unfortunate tendency to mix per-session state error
handling with per-thread error handling. This can cause problems when
programs that link to libpq with OpenSSL enabled have some other use of
OpenSSL; without care, one caller of OpenSSL may cause problems for the
other caller. Backend code might similarly be affected, for example
when a third party extension independently uses OpenSSL without taking
the appropriate precautions.
To fix, don't trust other users of OpenSSL to clear the per-thread error
queue. Instead, clear the entire per-thread queue ahead of certain I/O
operations when it appears that there might be trouble (these I/O
operations mostly need to call SSL_get_error() to check for success,
which relies on the queue being empty). This is slightly aggressive,
but it's pretty clear that the other callers have a very dubious claim
to ownership of the per-thread queue. Do this is both frontend and
backend code.
Finally, be more careful about clearing our own error queue, so as to
not cause these problems ourself. It's possibly that control previously
did not always reach SSLerrmessage(), where ERR_get_error() was supposed
to be called to clear the queue's earliest code. Make sure
ERR_get_error() is always called, so as to spare other users of OpenSSL
the possibility of similar problems caused by libpq (as opposed to
problems caused by a third party OpenSSL library like PHP's OpenSSL
extension). Again, do this is both frontend and backend code.
See bug #12799 and https://bugs.php.net/bug.php?id=68276
Based on patches by Dave Vitek and Peter Eisentraut.
From: Peter Geoghegan <
[email protected]>
Peter Eisentraut [Sat, 7 May 2016 03:45:12 +0000 (23:45 -0400)]
Fix SSL tests
These were accidentally broken by the great backpatching of
331828b754378733cb5c2e49227603e7354e4e39.
Tom Lane [Sat, 7 May 2016 02:05:51 +0000 (22:05 -0400)]
Fix pg_upgrade to not fail when new-cluster TOAST rules differ from old.
This patch essentially reverts commit
4c6780fd17aa43ed, in favor of a much
simpler solution for the case where the new cluster would choose to create
a TOAST table but the old cluster doesn't have one: just don't create a
TOAST table.
The existing code failed in at least two different ways if the situation
arose: (1) ALTER TABLE RESET didn't grab an exclusive lock, so that the
lock sanity check in create_toast_table failed; (2) pg_upgrade did not
provide a pg_type OID for the new toast table, so that the crosscheck in
TypeCreate failed. While both these problems were introduced by later
patches, they show that the hack being used to cause TOAST table creation
is overwhelmingly fragile (and untested). I also note that before the
TypeCreate crosscheck was added, the code would have resulted in assigning
an indeterminate pg_type OID to the toast table, possibly causing a later
OID conflict in that catalog; so that it didn't really work even when
committed.
If we simply don't create a TOAST table, there will only be a problem if
the code tries to store a tuple that's wider than a page, and field
compression isn't sufficient to get it under a page. Given that the TOAST
creation threshold is intended to be about a quarter of a page, it's very
hard to believe that cross-version differences in the do-we-need-a-toast-
table heuristic could result in an observable problem. So let's just
follow the old version's conclusion about whether a TOAST table is needed.
(If we ever do change needs_toast_table() so much that this conclusion
doesn't apply, we can devise a solution at that time, and hopefully do
it in a less klugy way than
4c6780fd17aa43ed did.)
Back-patch to 9.3, like the previous patch.
Discussion: <8110.
1462291671@sss.pgh.pa.us>
Tom Lane [Fri, 6 May 2016 16:09:20 +0000 (12:09 -0400)]
Fix possible read past end of string in to_timestamp().
to_timestamp() handles the TH/th format codes by advancing over two input
characters, whatever those are. It failed to notice whether there were
two characters available to be skipped, making it possible to advance
the pointer past the end of the input string and keep on parsing.
A similar risk existed in the handling of "Y,YYY" format: it would advance
over three characters after the "," whether or not three characters were
available.
In principle this might be exploitable to disclose contents of server
memory. But the security team concluded that it would be very hard to use
that way, because the parsing loop would stop upon hitting any zero byte,
and TH/th format codes can't be consecutive --- they have to follow some
other format code, which would have to match whatever data is there.
So it seems impractical to examine memory very much beyond the end of the
input string via this bug; and the input string will always be in local
memory not in disk buffers, making it unlikely that anything very
interesting is close to it in a predictable way. So this doesn't quite
rise to the level of needing a CVE.
Thanks to Wolf Roediger for reporting this bug.
Tom Lane [Fri, 6 May 2016 00:08:58 +0000 (20:08 -0400)]
Update time zone data files to tzdata release 2016d.
DST law changes in Russia (Magadan, Tomsk regions) and Venezuela.
Historical corrections for Russia. There are new zone names Europe/Kirov
and Asia/Tomsk reflecting the fact that these regions now have different
time zone histories from adjacent regions.
Tom Lane [Thu, 5 May 2016 16:33:13 +0000 (12:33 -0400)]
Fix ordering/categorization of some recently-added system views.
Somebody added pg_replication_origin, pg_replication_origin_status and
pg_replication_slots to catalogs.sgml without a whole lot of concern for
either alphabetical order or the difference between a table and a view.
Clean up the mess.
Back-patch to 9.5, not so much because this is critical as because if
I don't it will result in a cross-branch divergence in release-9.5.sgml,
which would be a maintenance hazard.
Peter Eisentraut [Wed, 4 May 2016 18:07:00 +0000 (14:07 -0400)]
doc: Fix more typos
From: Alexander Law <
[email protected]>
Peter Eisentraut [Wed, 4 May 2016 01:06:25 +0000 (21:06 -0400)]
doc: Fix typos
From: Alexander Law <
[email protected]>
Tom Lane [Mon, 2 May 2016 15:18:10 +0000 (11:18 -0400)]
Fix configure's incorrect version tests for flex and perl.
awk's equality-comparison operator is "==" not "=". We got this right
in many places, but not in configure's checks for supported version
numbers of flex and perl. It hadn't been noticed because unsupported
versions are so old as to be basically extinct in the wild, and because
the only consequence is whether or not a WARNING flies by during
configure.
Daniel Gustafsson noted the problem with respect to the test for flex,
I found the other by reviewing other awk calls.
Heikki Linnakangas [Mon, 2 May 2016 07:07:49 +0000 (10:07 +0300)]
Remove unused macros.
CHECK_PAGE_OFFSET_RANGE() has been unused forever.
CHECK_RELATION_BLOCK_RANGE() has been unused in pgstatindex.c ever since
bt_page_stats() and bt_page_items() functions were moved from pgstattuple
to pageinspect module. It still exists in pageinspect/btreefuncs.c.
Daniel Gustafsson
Peter Eisentraut [Mon, 2 May 2016 01:33:31 +0000 (21:33 -0400)]
doc: Fix typo
From: Guillaume Lelarge <
[email protected]>
Tom Lane [Sat, 30 Apr 2016 00:19:38 +0000 (20:19 -0400)]
Fix mishandling of equivalence-class tests in parameterized plans.
Given a three-or-more-way equivalence class, such as X.Y = Y.Y = Z.Z,
it was possible for the planner to omit one of the quals needed to
enforce that all members of the equivalence class are actually equal.
This only happened in the case of a parameterized join node for two
of the relations, that is a plan tree like
Nested Loop
-> Scan X
-> Nested Loop
-> Scan Y
-> Scan Z
Filter: Z.Z = X.X
The eclass machinery normally expects to apply X.X = Y.Y when those
two relations are joined, but in this shape of plan tree they aren't
joined until the top node --- and, if the lower nested loop is marked
as parameterized by X, the top node will assume that the relevant eclass
condition(s) got pushed down into the lower node. On the other hand,
the scan of Z assumes that it's only responsible for constraining Z.Z
to match any one of the other eclass members. So one or another of
the required quals sometimes fell between the cracks, depending on
whether consideration of the eclass in get_joinrel_parampathinfo()
for the lower nested loop chanced to generate X.X = Y.Y or X.X = Z.Z
as the appropriate constraint there. If it generated the latter,
it'd erroneously suppose that the Z scan would take care of matters.
To fix, force X.X = Y.Y to be generated and applied at that join node
when this case occurs.
This is *extremely* hard to hit in practice, because various planner
behaviors conspire to mask the problem; starting with the fact that the
planner doesn't really like to generate a parameterized plan of the
above shape. (It might have been impossible to hit it before we
tweaked things to allow this plan shape for star-schema cases.) Many
thanks to Alexander Kirkouski for submitting a reproducible test case.
The bug can be demonstrated in all branches back to 9.2 where parameterized
paths were introduced, so back-patch that far.
Andrew Dunstan [Fri, 29 Apr 2016 18:18:51 +0000 (14:18 -0400)]
Fix comment whitespace in VS2105 patch
per gripe from Michael Paquier.
Andrew Dunstan [Fri, 29 Apr 2016 13:49:31 +0000 (09:49 -0400)]
Fix typo in VS2015 patch
reported by Christian Ullrich
Andrew Dunstan [Fri, 29 Apr 2016 11:59:47 +0000 (07:59 -0400)]
Support building with Visual Studio 2015
Adjust the way we detect the locale. As a result the minumum Windows
version supported by VS2015 and later is Windows Vista. Add some tweaks
to remove new compiler warnings. Remove documentation references to the
now obsolete msysGit.
Michael Paquier, somewhat edited by me, reviewed by Christian Ullrich.
Backpatch to 9.5
Andres Freund [Fri, 29 Apr 2016 05:09:48 +0000 (22:09 -0700)]
Remember asking for feedback during walsender shutdown.
Since
5a991ef8 we're explicitly asking for feedback from the receiving
side when shutting down walsender, if there's not yet replicated
data.
Unfortunately we didn't remember (i.e. set waiting_for_ping_response to
true) having asked for feedback, leading to scenarios in which replies
were requested at a high frequency.
I can't reproduce this problem on my laptop, I think that's because the
problem requires a significant TCP window to manifest due to the
!pq_is_send_pending() condition. But since this clearly is a bug, let's
fix it. There's quite possibly more wrong than just this though.
While fiddling with WalSndDone(), I rewrote a hard to understand comment
about looking at the flush vs. the write position.
Reported-By: Nick Cleaton, Magnus Hagander
Author: Nick Cleaton
Discussion: CAFgz3kus=rC_avEgBV=+hRK5HYJ8vXskJRh8yEAbahJGTzF2VQ@mail.gmail.com
CABUevExsjROqDcD0A2rnJ6HK6FuKGyewJr3PL12pw85BHFGS2Q@mail.gmail.com
Backpatch: 9.4, were
5a991ef8 introduced the use of feedback messages
during shutdown.
Tom Lane [Thu, 28 Apr 2016 15:50:58 +0000 (11:50 -0400)]
Adjust DatumGetBool macro, this time for sure.
Commit
23a41573c attempted to fix the DatumGetBool macro to ignore bits
in a Datum that are to the left of the actual bool value. But it did that
by casting the Datum to bool; and on compilers that use C99 semantics for
bool, that ends up being a whole-word test, not a 1-byte test. This seems
to be the true explanation for contrib/seg failing in VS2015. To fix, use
GET_1_BYTE() explicitly. I think in the previous patch, I'd had some idea
of not having to commit to bool being exactly 1 byte wide, but regardless
of what the compiler's bool is, boolean columns and Datums are certainly
1 byte wide.
The previous fix was (eventually) back-patched into all active versions,
so do likewise with this one.
Tom Lane [Thu, 28 Apr 2016 15:48:10 +0000 (11:48 -0400)]
Revert "Convert contrib/seg's bool-returning SQL functions to V1 call convention."
This reverts commit
b1dd2f86ce7d43f23f6aae307bb22de826849e7d.
That turns out to have been based on a faulty diagnosis of why the
VS2015 build was misbehaving. Instead, we need to fix DatumGetBool().
Noah Misch [Wed, 27 Apr 2016 01:53:58 +0000 (21:53 -0400)]
Impose a full barrier in generic-xlc.h atomics functions.
pg_atomic_compare_exchange_*_impl() were providing only the semantics of
an acquire barrier. Buildfarm members hornet and mandrill revealed this
deficit beginning with commit
008608b9d51061b1f598c197477b3dc7be9c4a64.
While we have no report of symptoms in 9.5, we can't rule out the
possibility of certain compilers, hardware, or extension code relying on
these functions' specified barrier semantics. Back-patch to 9.5, where
commit
b64d92f1a5602c55ee8b27a7ac474f03b7aee340 introduced atomics.
Reviewed by Andres Freund.
Peter Eisentraut [Mon, 25 Apr 2016 00:44:22 +0000 (20:44 -0400)]
doc: Fix typo
From: Andreas Seltenreich <
[email protected]>
Tom Lane [Sat, 23 Apr 2016 20:53:15 +0000 (16:53 -0400)]
Rename strtoi() to strtoint().
NetBSD has seen fit to invent a libc function named strtoi(), which
conflicts with the long-established static functions of the same name in
datetime.c and ecpg's interval.c. While muttering darkly about intrusions
on application namespace, we'll rename our functions to avoid the conflict.
Back-patch to all supported branches, since this would affect attempts
to build any of them on recent NetBSD.
Thomas Munro
Peter Eisentraut [Sat, 23 Apr 2016 18:48:02 +0000 (14:48 -0400)]
doc: Fix typos
From: Erik Rijkers <
[email protected]>
Tom Lane [Fri, 22 Apr 2016 15:54:23 +0000 (11:54 -0400)]
Convert contrib/seg's bool-returning SQL functions to V1 call convention.
It appears that we can no longer get away with using V0 call convention
for bool-returning functions in newer versions of MSVC. The compiler
seems to generate code that doesn't clear the higher-order bits of the
result register, causing the bool result Datum to often read as "true"
when "false" was intended. This is not very surprising, since the
function thinks it's returning a bool-width result but fmgr_oldstyle
assumes that V0 functions return "char *"; what's surprising is that
that hack worked for so long on so many platforms.
The only functions of this description in core+contrib are in contrib/seg,
which we'd intentionally left mostly in V0 style to serve as a warning
canary if V0 call convention breaks. We could imagine hacking things
so that they're still V0 (we'd have to redeclare the bool-returning
functions as returning some suitably wide integer type, like size_t,
at the C level). But on the whole it seems better to convert 'em to V1.
We can still leave the pointer- and int-returning functions in V0 style,
so that the test coverage isn't gone entirely.
Back-patch to 9.5, since our intention is to support VS2015 in 9.5
and later. There's no SQL-level change in the functions' behavior
so back-patching should be safe enough.
Discussion: <22094.
1461273324@sss.pgh.pa.us>
Michael Paquier, adjusted some by me
Magnus Hagander [Fri, 22 Apr 2016 09:18:59 +0000 (05:18 -0400)]
Add putenv support for msvcrt from Visual Studio 2013
This was missed when VS 2013 support was added.
Michael Paquier
Tom Lane [Fri, 22 Apr 2016 03:17:36 +0000 (23:17 -0400)]
Fix unexpected side-effects of operator_precedence_warning.
The implementation of that feature involves injecting nodes into the
raw parsetree where explicit parentheses appear. Various places in
parse_expr.c that test to see "is this child node of type Foo" need to
look through such nodes, else we'll get different behavior when
operator_precedence_warning is on than when it is off. Note that we only
need to handle this when testing untransformed child nodes, since the
AEXPR_PAREN nodes will be gone anyway after transformExprRecurse.
Per report from Scott Ribe and additional code-reading. Back-patch
to 9.5 where this feature was added.
Report: <
ED37E303-1B0A-4CD8-8E1E-
B9C4C2DD9A17@elevated-dev.com>
Tom Lane [Fri, 22 Apr 2016 00:05:58 +0000 (20:05 -0400)]
Fix planner failure with full join in RHS of left join.
Given a left join containing a full join in its righthand side, with
the left join's joinclause referencing only one side of the full join
(in a non-strict fashion, so that the full join doesn't get simplified),
the planner could fail with "failed to build any N-way joins" or related
errors. This happened because the full join was seen as overlapping the
left join's RHS, and then recent changes within join_is_legal() caused
that function to conclude that the full join couldn't validly be formed.
Rather than try to rejigger join_is_legal() yet more to allow this,
I think it's better to fix initsplan.c so that the required join order
is explicit in the SpecialJoinInfo data structure. The previous coding
there essentially ignored full joins, relying on the fact that we don't
flatten them in the joinlist data structure to preserve their ordering.
That's sufficient to prevent a wrong plan from being formed, but as this
example shows, it's not sufficient to ensure that the right plan will
be formed. We need to work a bit harder to ensure that the right plan
looks sane according to the SpecialJoinInfos.
Per bug #14105 from Vojtech Rylko. This was apparently induced by
commit
8703059c6 (though now that I've seen it, I wonder whether there
are related cases that could have failed before that); so back-patch
to all active branches. Unfortunately, that patch also went into 9.0,
so this bug is a regression that won't be fixed in that branch.
Tom Lane [Thu, 21 Apr 2016 20:58:47 +0000 (16:58 -0400)]
Improve TranslateSocketError() to handle more Windows error codes.
The coverage was rather lean for cases that bind() or listen() might
return. Add entries for everything that there's a direct equivalent
for in the set of Unix errnos that elog.c has heard of.
Tom Lane [Thu, 21 Apr 2016 20:16:19 +0000 (16:16 -0400)]
Remove dead code in win32.h.
There's no longer a need for the MSVC-version-specific code stanza that
forcibly redefines errno code symbols, because since commit
73838b52 we're
unconditionally redefining them in the stanza before this one anyway.
Now it's merely confusing and ugly, so get rid of it; and improve the
comment that explains what's going on here.
Although this is just cosmetic, back-patch anyway since I'm intending
to back-patch some less-cosmetic changes in this same hunk of code.
Tom Lane [Thu, 21 Apr 2016 19:44:18 +0000 (15:44 -0400)]
Provide errno-translation wrappers around bind() and listen() on Windows.
Fix Windows builds to report something useful rather than "could not bind
IPv4 socket: No error" when bind() fails.
Back-patch of commits
d1b7d4877b9a71f4 and
22989a8e34168f57.
Discussion: <4065.
1452450340@sss.pgh.pa.us>
Tom Lane [Thu, 21 Apr 2016 18:20:18 +0000 (14:20 -0400)]
Fix ruleutils.c's dumping of ScalarArrayOpExpr containing an EXPR_SUBLINK.
When we shoehorned "x op ANY (array)" into the SQL syntax, we created a
fundamental ambiguity as to the proper treatment of a sub-SELECT on the
righthand side: perhaps what's meant is to compare x against each row of
the sub-SELECT's result, or perhaps the sub-SELECT is meant as a scalar
sub-SELECT that delivers a single array value whose members should be
compared against x. The grammar resolves it as the former case whenever
the RHS is a select_with_parens, making the latter case hard to reach ---
but you can get at it, with tricks such as attaching a no-op cast to the
sub-SELECT. Parse analysis would throw away the no-op cast, leaving a
parsetree with an EXPR_SUBLINK SubLink directly under a ScalarArrayOpExpr.
ruleutils.c was not clued in on this fine point, and would naively emit
"x op ANY ((SELECT ...))", which would be parsed as the first alternative,
typically leading to errors like "operator does not exist: text = text[]"
during dump/reload of a view or rule containing such a construct. To fix,
emit a no-op cast when dumping such a parsetree. This might well be
exactly what the user wrote to get the construct accepted in the first
place; and even if she got there with some other dodge, it is a valid
representation of the parsetree.
Per report from Karl Czajkowski. He mentioned only a case involving
RLS policies, but actually the problem is very old, so back-patch to
all supported branches.
Report: <
20160421001832[email protected]>
Tom Lane [Thu, 21 Apr 2016 03:48:13 +0000 (23:48 -0400)]
Honor PGCTLTIMEOUT environment variable for pg_regress' startup wait.
In commit
2ffa86962077c588 we made pg_ctl recognize an environment variable
PGCTLTIMEOUT to set the default timeout for starting and stopping the
postmaster. However, pg_regress uses pg_ctl only for the "stop" end of
that; it has bespoke code for starting the postmaster, and that code has
historically had a hard-wired 60-second timeout. Further buildfarm
experience says it'd be a good idea if that timeout were also controlled
by PGCTLTIMEOUT, so let's make it so. Like the previous patch, back-patch
to all active branches.
Discussion: <13969.
1461191936@sss.pgh.pa.us>
Tom Lane [Wed, 20 Apr 2016 18:25:15 +0000 (14:25 -0400)]
Fix memory leak and other bugs in ginPlaceToPage() & subroutines.
Commit
36a35c550ac114ca turned the interface between ginPlaceToPage and
its subroutines in gindatapage.c and ginentrypage.c into a royal mess:
page-update critical sections were started in one place and finished in
another place not even in the same file, and the very same subroutine
might return having started a critical section or not. Subsequent patches
band-aided over some of the problems with this design by making things
even messier.
One user-visible resulting problem is memory leaks caused by the need for
the subroutines to allocate storage that would survive until ginPlaceToPage
calls XLogInsert (as reported by Julien Rouhaud). This would not typically
be noticeable during retail index updates. It could be visible in a GIN
index build, in the form of memory consumption swelling to several times
the commanded maintenance_work_mem.
Another rather nasty problem is that in the internal-page-splitting code
path, we would clear the child page's GIN_INCOMPLETE_SPLIT flag well before
entering the critical section that it's supposed to be cleared in; a
failure in between would leave the index in a corrupt state. There were
also assorted coding-rule violations with little immediate consequence but
possible long-term hazards, such as beginning an XLogInsert sequence before
entering a critical section, or calling elog(DEBUG) inside a critical
section.
To fix, redefine the API between ginPlaceToPage() and its subroutines
by splitting the subroutines into two parts. The "beginPlaceToPage"
subroutine does what can be done outside a critical section, including
full computation of the result pages into temporary storage when we're
going to split the target page. The "execPlaceToPage" subroutine is called
within a critical section established by ginPlaceToPage(), and it handles
the actual page update in the non-split code path. The critical section,
as well as the XLOG insertion call sequence, are both now always started
and finished in ginPlaceToPage(). Also, make ginPlaceToPage() create and
work in a short-lived memory context to eliminate the leakage problem.
(Since a short-lived memory context had been getting created in the most
common code path in the subroutines, this shouldn't cause any noticeable
performance penalty; we're just moving the overhead up one call level.)
In passing, fix a bunch of comments that had gone unmaintained throughout
all this klugery.
Report: <
571276DD.
5050303@dalibo.com>
Tom Lane [Mon, 18 Apr 2016 17:33:07 +0000 (13:33 -0400)]
Further reduce the number of semaphores used under --disable-spinlocks.
Per discussion, there doesn't seem to be much value in having
NUM_SPINLOCK_SEMAPHORES set to 1024: under any scenario where you are
running more than a few backends concurrently, you really had better have a
real spinlock implementation if you want tolerable performance. And 1024
semaphores is a sizable fraction of the system-wide SysV semaphore limit
on many platforms. Therefore, reduce this setting's default value to 128
to make it less likely to cause out-of-semaphores problems.
Peter Eisentraut [Sat, 16 Apr 2016 00:44:10 +0000 (20:44 -0400)]
doc: Add missing parentheses
From: Alexander Law <
[email protected]>
Tom Lane [Fri, 15 Apr 2016 16:11:27 +0000 (12:11 -0400)]
Fix possible crash in ALTER TABLE ... REPLICA IDENTITY USING INDEX.
Careless coding added by commit
07cacba983ef79be could result in a crash
or a bizarre error message if someone tried to select an index on the
OID column as the replica identity index for a table. Back-patch to 9.4
where the feature was introduced.
Discussion: CAKJS1f8TQYgTRDyF1_u9PVCKWRWz+DkieH=U7954HeHVPJKaKg@mail.gmail.com
David Rowley
Tom Lane [Fri, 15 Apr 2016 04:02:26 +0000 (00:02 -0400)]
Fix memory leak in GIN index scans.
The code had a query-lifespan memory leak when encountering GIN entries
that have posting lists (rather than posting trees, ie, there are a
relatively small number of heap tuples containing this index key value).
With a suitable data distribution this could add up to a lot of leakage.
Problem seems to have been introduced by commit
36a35c550, so back-patch
to 9.4.
Julien Rouhaud
Andres Freund [Fri, 15 Apr 2016 01:54:06 +0000 (18:54 -0700)]
Remove trailing commas in enums.
These aren't valid C89. Found thanks to gcc's -Wc90-c99-compat. These
exist in differing places in most supported branches.
Tom Lane [Thu, 14 Apr 2016 23:42:22 +0000 (19:42 -0400)]
Fix core dump in ReorderBufferRestoreChange on alignment-picky platforms.
When re-reading an update involving both an old tuple and a new tuple from
disk, reorderbuffer.c was careless about whether the new tuple is suitably
aligned for direct access --- in general, it isn't. We'd missed seeing
this in the buildfarm because the contrib/test_decoding tests exercise this
code path only a few times, and by chance all of those cases have old
tuples with length a multiple of 4, which is usually enough to make the
access to the new tuple's t_len safe. For some still-not-entirely-clear
reason, however, Debian's sparc build gets a bus error, as reported by
Christoph Berg; perhaps it's assuming 8-byte alignment of the pointer?
The lack of previous field reports is probably because you need all of
these conditions to trigger a crash: an alignment-picky platform (not
Intel), a transaction large enough to spill to disk, an update within
that xact that changes a primary-key field and has an odd-length old tuple,
and of course logical decoding tracing the transaction.
Avoid the alignment assumption by using memcpy instead of fetching t_len
directly, and add a test case that exposes the crash on picky platforms.
Back-patch to 9.4 where the bug was introduced.
Discussion: <
20160413094117[email protected]>
Tom Lane [Thu, 14 Apr 2016 16:18:09 +0000 (12:18 -0400)]
Adjust datatype of ReplicationState.acquired_by.
It was declared as "pid_t", which would be fine except that none of
the places that printed it in error messages took any thought for the
possibility that it's not equivalent to "int". This leads to warnings
on some buildfarm members, and could possibly lead to actually wrong
error messages on those platforms. There doesn't seem to be any very
good reason not to just make it "int"; it's only ever assigned from
MyProcPid, which is int. If we want to cope with PIDs that are wider
than int, this is not the place to start.
Also, fix the comment, which seems to perhaps be a leftover from a time
when the field was only a bool?
Per buildfarm. Back-patch to 9.5 which has same issue.
Tom Lane [Wed, 13 Apr 2016 22:57:52 +0000 (18:57 -0400)]
Fix pg_dump so pg_upgrade'ing an extension with simple opfamilies works.
As reported by Michael Feld, pg_upgrade'ing an installation having
extensions with operator families that contain just a single operator class
failed to reproduce the extension membership of those operator families.
This caused no immediate ill effects, but would create problems when later
trying to do a plain dump and restore, because the seemingly-not-part-of-
the-extension operator families would appear separately in the pg_dump
output, and then would conflict with the families created by loading the
extension. This has been broken ever since extensions were introduced,
and many of the standard contrib extensions are affected, so it's a bit
astonishing nobody complained before.
The cause of the problem is a perhaps-ill-considered decision to omit
such operator families from pg_dump's output on the grounds that the
CREATE OPERATOR CLASS commands could recreate them, and having explicit
CREATE OPERATOR FAMILY commands would impede loading the dump script into
pre-8.3 servers. Whatever the merits of that decision when 8.3 was being
written, it looks like a poor tradeoff now. We can fix the pg_upgrade
problem simply by removing that code, so that the operator families are
dumped explicitly (and then will be properly made to be part of their
extensions).
Although this fixes the behavior of future pg_upgrade runs, it does nothing
to clean up existing installations that may have improperly-linked operator
families. Given the small number of complaints to date, maybe we don't
need to worry about providing an automated solution for that; anyone who
needs to clean it up can do so with manual "ALTER EXTENSION ADD OPERATOR
FAMILY" commands, or even just ignore the duplicate-opfamily errors they
get during a pg_restore. In any case we need this fix.
Back-patch to all supported branches.
Discussion: <20228.
1460575691@sss.pgh.pa.us>
Tom Lane [Tue, 12 Apr 2016 00:07:17 +0000 (20:07 -0400)]
Fix _SPI_execute_plan() for CREATE TABLE IF NOT EXISTS foo AS ...
When IF NOT EXISTS was added to CREATE TABLE AS, this logic didn't get
the memo, possibly resulting in an Assert failure. It looks like there
would have been no ill effects in a non-Assert build, though. Back-patch
to 9.5 where the IF NOT EXISTS option was added.
Stas Kelvich
Tom Lane [Mon, 11 Apr 2016 22:17:02 +0000 (18:17 -0400)]
Fix freshly-introduced PL/Python portability bug.
It turns out that those PyErr_Clear() calls I removed from plpy_elog.c
in
7e3bb080387f4143 et al were not quite as random as they appeared: they
mask a Python 2.3.x bug. (Specifically, it turns out that PyType_Ready()
can fail if the error indicator is set on entry, and PLy_traceback's fetch
of frame.f_code may be the first operation in a session that requires the
"frame" type to be readied. Ick.) Put back the clear call, but in a more
centralized place closer to what it's protecting, and this time with a
comment warning what it's really for.
Per buildfarm member prairiedog. Although prairiedog was only failing
on HEAD, it seems clearly possible for this to occur in older branches
as well, so back-patch to 9.2 the same as the previous patch.
Tom Lane [Mon, 11 Apr 2016 03:15:55 +0000 (23:15 -0400)]
Fix access-to-already-freed-memory issue in plpython's error handling.
PLy_elog() could attempt to access strings that Python had already freed,
because the strings that PLy_get_spi_error_data() returns are simply
pointers into storage associated with the error "val" PyObject. That's
fine at the instant PLy_get_spi_error_data() returns them, but just after
that PLy_traceback() intentionally releases the only refcount on that
object, allowing it to be freed --- so that the strings we pass to
ereport() are dangling pointers.
In principle this could result in garbage output or a coredump. In
practice, I think the risk is pretty low, because there are no Python
operations between where we decrement that refcount and where we use the
strings (and copy them into PG storage), and thus no reason for Python
to recycle the storage. Still, it's clearly hazardous, and it leads to
Valgrind complaints when running under a Valgrind that hasn't been
lobotomized to ignore Python memory allocations.
The code was a mess anyway: we fetched the error data out of Python
(clearing Python's error indicator) with PyErr_Fetch, examined it, pushed
it back into Python with PyErr_Restore (re-setting the error indicator),
then immediately pulled it back out with another PyErr_Fetch. Just to
confuse matters even more, there were some gratuitous-and-yet-hazardous
PyErr_Clear calls in the "examine" step, and we didn't get around to doing
PyErr_NormalizeException until after the second PyErr_Fetch, making it even
less clear which object was being manipulated where and whether we still
had a refcount on it. (If PyErr_NormalizeException did substitute a
different "val" object, it's possible that the problem could manifest for
real, because then we'd be doing assorted Python stuff with no refcount
on the object we have string pointers into.)
So, rearrange all that into some semblance of sanity, and don't decrement
the refcount on the Python error objects until the end of PLy_elog().
In HEAD, I failed to resist the temptation to reformat some messy bits
from
5c3c3cd0a3046339 along the way.
Back-patch as far as 9.2, because the code is substantially the same
that far back. I believe that 9.1 has the bug as well; but the code
around it is rather different and I don't want to take a chance on
breaking something for what seems a low-probability problem.
Teodor Sigaev [Fri, 8 Apr 2016 18:25:32 +0000 (21:25 +0300)]
Fix possible use of uninitialised value in ts_headline()
Found during investigation of failure of skink buildfarm member and its
valgrind report.
Backpatch to all supported branches
Andrew Dunstan [Fri, 8 Apr 2016 16:25:10 +0000 (12:25 -0400)]
Turn down MSVC compiler verbosity
Most of what is produced by the detailed verbosity level is of no
interest at all, so switch to the normal level for more usable output.
Christian Ullrich
Backpatch to all live branches
Tom Lane [Fri, 8 Apr 2016 16:31:42 +0000 (12:31 -0400)]
Fix multiple bugs in tablespace symlink removal.
Don't try to examine S_ISLNK(st.st_mode) after a failed lstat().
It's undefined.
Also, if the lstat() reported ENOENT, we do not wish that to be a hard
error, but the code might nonetheless treat it as one (giving an entirely
misleading error message, too) depending on luck-of-the-draw as to what
S_ISLNK() returned.
Don't throw error for ENOENT from rmdir(), either. (We're not really
expecting ENOENT because we just stat'd the file successfully; but
if we're going to allow ENOENT in the symlink code path, surely the
directory code path should too.)
Generate an appropriate errcode for its-the-wrong-type-of-file complaints.
(ERRCODE_SYSTEM_ERROR doesn't seem appropriate, and failing to write
errcode() around it certainly doesn't work, and not writing an errcode
at all is not per project policy.)
Valgrind noticed the undefined S_ISLNK result; the other problems emerged
while reading the code in the area.
All of this appears to have been introduced in
8f15f74a44f68f9c.
Back-patch to 9.5 where that commit appeared.
Alvaro Herrera [Tue, 5 Apr 2016 22:03:42 +0000 (19:03 -0300)]
Fix broken ALTER INDEX documentation
Commit
b8a91d9d1c put the description of the new IF EXISTS clause in the
wrong place -- move it where it belongs.
Backpatch to 9.2.
Tom Lane [Mon, 4 Apr 2016 22:05:23 +0000 (18:05 -0400)]
Disallow newlines in parameter values to be set in ALTER SYSTEM.
As noted by Julian Schauder in bug #14063, the configuration-file parser
doesn't support embedded newlines in string literals. While there might
someday be a good reason to remove that restriction, there doesn't seem
to be one right now. However, ALTER SYSTEM SET could accept strings
containing newlines, since many of the variable-specific value-checking
routines would just see a newline as whitespace. This led to writing a
postgresql.auto.conf file that was broken and had to be removed manually.
Pending a reason to work harder, just throw an error if someone tries this.
In passing, fix several places in the ALTER SYSTEM logic that failed to
provide an errcode() for an ereport(), and thus would falsely log the
failure as an internal XX000 error.
Back-patch to 9.4 where ALTER SYSTEM was introduced.
Tom Lane [Mon, 4 Apr 2016 15:13:17 +0000 (11:13 -0400)]
Fix latent portability issue in pgwin32_dispatch_queued_signals().
The first iteration of the signal-checking loop would compute sigmask(0)
which expands to 1<<(-1) which is undefined behavior according to the
C standard. The lack of field reports of trouble suggest that it
evaluates to 0 on all existing Windows compilers, but that's hardly
something to rely on. Since signal 0 isn't a queueable signal anyway,
we can just make the loop iterate from 1 instead, and save a few cycles
as well as avoiding the undefined behavior.
In passing, avoid evaluating the volatile expression UNBLOCKED_SIGNAL_QUEUE
twice in a row; there's no reason to waste cycles like that.
Noted by Aleksander Alekseev, though this isn't his proposed fix.
Back-patch to all supported branches.
Alvaro Herrera [Thu, 31 Mar 2016 02:39:15 +0000 (23:39 -0300)]
Fix broken variable declaration
Author: Konstantin Knizhnik
Tom Lane [Wed, 30 Mar 2016 01:38:14 +0000 (21:38 -0400)]
Remove TZ environment-variable entry from postgres reference page.
The server hasn't paid attention to the TZ environment variable since
commit
ca4af308c32d03db, but that commit missed removing this documentation
reference, as did commit
d883b916a947a3c6 which added the reference where
it now belongs (initdb).
Back-patch to 9.2 where the behavior changed. Also back-patch
d883b916a947a3c6 as needed.
Matthew Somerville
Robert Haas [Tue, 29 Mar 2016 17:46:57 +0000 (13:46 -0400)]
Fix pgbench documentation error.
The description of what the per-transaction log file says for skipped
transactions is just plain wrong.
Report and patch by Tomas Vondra, reviewed by Fabien Coelho and
modified by me.
Tom Lane [Tue, 29 Mar 2016 15:54:57 +0000 (11:54 -0400)]
Avoid possibly-unsafe use of Windows' FormatMessage() function.
Whenever this function is used with the FORMAT_MESSAGE_FROM_SYSTEM flag,
it's good practice to include FORMAT_MESSAGE_IGNORE_INSERTS as well.
Otherwise, if the message contains any %n insertion markers, the function
will try to fetch argument strings to substitute --- which we are not
passing, possibly leading to a crash. This is exactly analogous to the
rule about not giving printf() a format string you're not in control of.
Noted and patched by Christian Ullrich.
Back-patch to all supported branches.
Alvaro Herrera [Mon, 28 Mar 2016 22:11:12 +0000 (19:11 -0300)]
Mention BRIN as able to do multi-column indexes
Documentation mentioned B-tree, GiST and GIN as able to do multicolumn
indexes; I failed to add BRIN to the list.
Author: Petr Jediný
Reviewed-By: Fujii Masao, Emre Hasegeli
Tom Lane [Mon, 28 Mar 2016 20:07:39 +0000 (16:07 -0400)]
Stamp 9.5.2.
Tom Lane [Mon, 28 Mar 2016 15:32:17 +0000 (11:32 -0400)]
Last-minute updates for release notes.
Security: CVE-2016-2193, CVE-2016-3065
Alvaro Herrera [Mon, 28 Mar 2016 13:57:42 +0000 (10:57 -0300)]
Add missing checks to some of pageinspect's BRIN functions
brin_page_type() and brin_metapage_info() did not enforce being called
by superuser, like other pageinspect functions that take bytea do.
Since they don't verify the passed page thoroughly, it is possible to
use them to read the server memory with a carefully crafted bytea value,
up to a file kilobytes from where the input bytea is located.
Have them throw errors if called by a non-superuser.
Report and initial patch: Andreas Seltenreich
Security: CVE-2016-3065
Stephen Frost [Mon, 28 Mar 2016 13:03:41 +0000 (09:03 -0400)]
Reset plan->row_security_env and planUserId
In the plancache, we check if the environment we planned the query under
has changed in a way which requires us to re-plan, such as when the user
for whom the plan was prepared changes and RLS is being used (and,
therefore, there may be different policies to apply).
Unfortunately, while those values were set and checked, they were not
being reset when the query was re-planned and therefore, in cases where
we change role, re-plan, and then change role again, we weren't
re-planning again. This leads to potentially incorrect policies being
applied in cases where role-specific policies are used and a given query
is planned under one role and then executed under other roles, which
could happen under security definer functions or when a common user and
query is planned initially and then re-used across multiple SET ROLEs.
Further, extensions which made use of CopyCachedPlan() may suffer from
similar issues as the RLS-related fields were not properly copied as
part of the plan and therefore RevalidateCachedQuery() would copy in the
current settings without invalidating the query.
Fix by using the same approach used for 'search_path', where we set the
correct values in CompleteCachedPlan(), check them early on in
RevalidateCachedQuery() and then properly reset them if re-planning.
Also, copy through the values during CopyCachedPlan().
Pointed out by Ashutosh Bapat. Reviewed by Michael Paquier.
Back-patch to 9.5 where RLS was introduced.
Security: CVE-2016-2193
Peter Eisentraut [Mon, 28 Mar 2016 06:44:53 +0000 (08:44 +0200)]
Translation updates
Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash:
0ffb9ae13cb7e2a9480ed8ee34071074bd80a7aa
Tom Lane [Sun, 27 Mar 2016 23:26:26 +0000 (19:26 -0400)]
Release notes for 9.5.2, 9.4.7, 9.3.12, 9.2.16, 9.1.21.
Andres Freund [Sun, 27 Mar 2016 21:46:25 +0000 (23:46 +0200)]
pg_rewind: fsync target data directory.
Previously pg_rewind did not fsync any files. That's problematic, given
that the target directory is modified. If the database was started
afterwards,
2ce439f33 luckily already caused the data directory to be
synced to disk at postmaster startup; reducing the scope of the problem.
To fix, use initdb -S, at the end of the pg_rewind run. It doesn't seem
worthwhile to duplicate the code into pg_rewind, and initdb -S is
already used that way by pg_upgrade.
Reported-By: Andres Freund
Author: Michael Paquier, somewhat edited by me
Discussion:
20160310034352[email protected]
CAB7nPqSytVG1o4S3S2pA1O=692ekurJ+fckW2PywEG3sNw54Ow@mail.gmail.com
Backpatch: 9.5, where pg_rewind was introduced
Andres Freund [Sun, 27 Mar 2016 20:48:31 +0000 (22:48 +0200)]
pg_rewind: Close backup_label file descriptor.
This was a relatively harmless leak, as createBackupLabel() is only
called once per pg_rewind invocation.
Author: Michael Paquier
Reported-By: Michael Paquier
Discussion: CAB7nPqRnOw30gOXe2_SPLjh37bgm4V+txbYAPwoXb97nGQ297w@mail.gmail.com
Backpatch: 9.5, where pg_rewind was introduced
Andres Freund [Sun, 27 Mar 2016 15:47:55 +0000 (17:47 +0200)]
Change various Gin*Is* macros to return 0/1.
Returning the direct result of bit arithmetic, in a macro intended to be
used in a boolean manner, can be problematic if the return value is
stored in a variable of type 'bool'. If bool is implemented using C99's
_Bool, that can lead to comparison failures if the variable is then
compared again with the expression (see ginStepRight() for an example
that fails), as _Bool forces the result to be 0/1. That happens in some
configurations of newer MSVC compilers. It's also problematic when
storing the result of such an expression in a narrower type.
Several gin macros have been declared in that style since gin's initial
commit in
8a3631f8d86.
There's a lot more macros like this, but this is the only one causing
regression test failures; and I don't want to commit and backpatch a
larger patch with lots of conflicts just before the next set of minor
releases.
Discussion:
20150811154237[email protected]
Backpatch: All supported branches
Tom Lane [Sat, 26 Mar 2016 19:58:44 +0000 (15:58 -0400)]
Modernize zic's test for valid timezone abbreviations.
We really need to sync all of our IANA-derived timezone code with upstream,
but that's going to be a large patch and I certainly don't care to shove
such a thing into stable branches immediately before a release. As a
stopgap, copy just the tzcode2016c logic that checks validity of timezone
abbreviations. This prevents getting multiple "time zone abbreviation
differs from POSIX standard" bleats with tzdata 2014b and later.
Tom Lane [Fri, 25 Mar 2016 23:03:08 +0000 (19:03 -0400)]
Update time zone data files to tzdata release 2016c.
DST law changes in Azerbaijan, Chile, Haiti, Palestine, and Russia (Altai,
Astrakhan, Kirov, Sakhalin, Ulyanovsk regions). Historical corrections
for Lithuania, Moldova, Russia (Kaliningrad, Samara, Volgograd).
As of 2015b, the keepers of the IANA timezone database started to use
numeric time zone abbreviations (e.g., "+04") instead of inventing
abbreviations not found in the wild like "ASTT". This causes our rather
old copy of zic to whine "warning: time zone abbreviation differs from
POSIX standard" several times during "make install". This warning is
harmless according to the IANA folk, and I don't see any problems with
these abbreviations in some simple tests; but it seems like now would be
a good time to update our copy of the tzcode stuff. I'll look into that
soon.
Robert Haas [Wed, 23 Mar 2016 19:58:34 +0000 (15:58 -0400)]
Disable abbreviated keys for string-sorting in non-C locales.
Unfortunately, every version of glibc thus far tested has bugs whereby
strcoll() ordering does not match strxfrm() ordering as required by
the standard. This can result in, for example, corrupted indexes.
Disabling abbreviated keys in these cases slows down non-C-collation
string sorting considerably, but there seems to be no practical
alternative. Users who are confident that their libc implementations
are solid in this regard can re-enable the optimization by compiling
with TRUST_STRXFRM.
Users who have built indexes using PostgreSQL 9.5 or PostgreSQL 9.5.1
should REINDEX if there is a possibility that they may have been
affected by this problem.
Report by Marc-Olaf Jaschke. Investigation mostly by Tom Lane, with
help from Peter Geoghegan, Noah Misch, Stephen Frost, and me. Patch
by me, reviewed by Peter Geoghegan and Tom Lane.
Tom Lane [Wed, 23 Mar 2016 15:00:39 +0000 (11:00 -0400)]
Code review for error reports in jsonb_set().
User-facing (even tested by regression tests) error conditions were thrown
with elog(), hence had wrong SQLSTATE and were untranslatable. And the
error message texts weren't up to project style, either.
Tom Lane [Wed, 23 Mar 2016 14:43:13 +0000 (10:43 -0400)]
Fix unsafe use of strtol() on a non-null-terminated Text datum.
jsonb_set() could produce wrong answers or incorrect error reports, or in
the worst case even crash, when trying to convert a path-array element into
an integer for use as an array subscript. Per report from Vitaly Burovoy.
Back-patch to 9.5 where the faulty code was introduced (in commit
c6947010ceb42143).
Michael Paquier
Simon Riggs [Wed, 23 Mar 2016 11:33:26 +0000 (11:33 +0000)]
Change comment to describe correct lock level used
Tom Lane [Tue, 22 Mar 2016 21:56:06 +0000 (17:56 -0400)]
Fix EvalPlanQual bug when query contains both locked and not-locked rels.
In commit
afb9249d06f47d7a, we (probably I) made ExecLockRows assign
null test tuples to all relations of the query while setting up to do an
EvalPlanQual recheck for a newly-updated locked row. This was sheerest
brain fade: we should only set test tuples for relations that are lockable
by the LockRows node, and in particular empty test tuples are only sensible
for inheritance child relations that weren't the source of the current
tuple from their inheritance tree. Setting a null test tuple for an
unrelated table causes it to return NULLs when it should not, as exhibited
in bug #14034 from Bronislav Houdek. To add insult to injury, doing it the
wrong way required two loops where one would suffice; so the corrected code
is even a bit shorter and faster.
Add a regression test case based on his example, and back-patch to 9.5
where the bug was introduced.
Andrew Dunstan [Sat, 19 Mar 2016 22:36:35 +0000 (18:36 -0400)]
Remove dependency on psed for MSVC builds.
Modern Perl has removed psed from its core distribution, so it might not
be readily available on some build platforms. We therefore replace its
use with a Perl script generated by s2p, which is equivalent to the sed
script. The latter is retained for non-MSVC builds to avoid creating a
new hard dependency on Perl for non-Windows tarball builds.
Backpatch to all live branches.
Michael Paquier and me.
Tom Lane [Sat, 19 Mar 2016 21:19:37 +0000 (17:19 -0400)]
Fix phony .PHONY.
A couple makefiles had misspelled the magic .PHONY target as PHONY.
Alvaro Herrera [Thu, 17 Mar 2016 23:17:04 +0000 (20:17 -0300)]
docs: Fix typo'd brin_summarize_new_values
I wrote "brin_summarize_new_pages" instead, in docs as well as in the
commit message of commit
ac443d1034d9.
Bug: #14030
Reported-By: Chris Pacejo
Tom Lane [Thu, 17 Mar 2016 20:46:23 +0000 (16:46 -0400)]
Remove useless double calls of make_parsestate().
Aleksander Alekseev
Tom Lane [Thu, 17 Mar 2016 19:50:33 +0000 (15:50 -0400)]
Fix assorted breakage in to_char()'s OF format option.
In HEAD, fix incorrect field width for hours part of OF when tm_gmtoff is
negative. This was introduced by commit
2d87eedc1d4468d3 as a result of
falsely applying a pattern that's correct when + signs are omitted, which
is not the case for OF.
In 9.4, fix missing abs() call that allowed a sign to be attached to the
minutes part of OF. This was fixed in 9.5 by
9b43d73b3f9bef27, but for
inscrutable reasons not back-patched.
In all three versions, ensure that the sign of tm_gmtoff is correctly
reported even when the GMT offset is less than 1 hour.
Add regression tests, which evidently we desperately need here.
Thomas Munro and Tom Lane, per report from David Fetter
Tom Lane [Thu, 17 Mar 2016 03:18:07 +0000 (23:18 -0400)]
Fix "pg_bench -C -M prepared".
This didn't work because when we dropped and re-established a database
connection, we did not bother to reset session-specific state such as
the statements-are-prepared flags.
The st->prepared[] array certainly needs to be flushed, and I cleared a
couple of other fields as well that couldn't possibly retain meaningful
state for a new connection.
In passing, fix some bogus comments and strange field order choices.
Per report from Robins Tharakan.
Stephen Frost [Tue, 15 Mar 2016 22:04:48 +0000 (18:04 -0400)]
Avoid incorrectly indicating exclusion constraint wait
INSERT ... ON CONFLICT's precheck may have to wait on the outcome of
another insertion, which may or may not itself be a speculative
insertion. This wait is not necessarily associated with an exclusion
constraint, but was always reported that way in log messages if the wait
happened to involve a tuple that had no speculative token.
Initially discovered through use of ON CONFLICT DO NOTHING, where
spurious references to exclusion constraints in log messages were more
likely.
Patch by Peter Geoghegan.
Reviewed by Julien Rouhaud.
Back-patch to 9.5 where INSERT ... ON CONFLICT was added.
Alvaro Herrera [Tue, 15 Mar 2016 20:57:17 +0000 (17:57 -0300)]
Fix typos in comments
Tom Lane [Tue, 15 Mar 2016 17:19:57 +0000 (13:19 -0400)]
Cope if platform declares mbstowcs_l(), but not locale_t, in <xlocale.h>.
Previously, we included <xlocale.h> only if necessary to get the definition
of type locale_t. According to notes in PGAC_TYPE_LOCALE_T, this is
important because on some versions of glibc that file supplies an
incompatible declaration of locale_t. (This info may be obsolete, because
on my RHEL6 box that seems to be the *only* definition of locale_t; but
there may still be glibc's in the wild for which it's a live concern.)
It turns out though that on FreeBSD and maybe other BSDen, you can get
locale_t from stdlib.h or locale.h but mbstowcs_l() and friends only from
<xlocale.h>. This was leaving us compiling calls to mbstowcs_l() and
friends with no visible prototype, which causes a warning and could
possibly cause actual trouble, since it's not declared to return int.
Hence, adjust the configure checks so that we'll include <xlocale.h>
either if it's necessary to get type locale_t or if it's necessary to
get a declaration of mbstowcs_l().
Report and patch by Aleksander Alekseev, somewhat whacked around by me.
Back-patch to all supported branches, since we have been using
mbstowcs_l() since 9.1.
Tom Lane [Mon, 14 Mar 2016 15:31:22 +0000 (11:31 -0400)]
Add missing NULL terminator to list_SECURITY_LABEL_preposition[].
On the machines I tried this on, pressing TAB after SECURITY LABEL led to
being offered ON and FOR as intended, plus random other keywords (varying
across machines). But if you were a bit more unlucky you'd get a crash,
as reported by
[email protected] in bug #14019.
Seems to have been an aboriginal error in the SECURITY LABEL patch,
commit
4d355a8336e0f226. Hence, back-patch to all supported versions.
There's no bug in HEAD, though, thanks to our recent tab-completion
rewrite.
Tom Lane [Sun, 13 Mar 2016 20:44:10 +0000 (16:44 -0400)]
Fix memory leak in repeated GIN index searches.
Commit
d88976cfa1302e8d removed this code from ginFreeScanKeys():
- if (entry->list)
- pfree(entry->list);
evidently in the belief that that ItemPointer array is allocated in the
keyCtx and so would be reclaimed by the following MemoryContextReset.
Unfortunately, it isn't and it won't. It'd likely be a good idea for
that to become so, but as a simple and back-patchable fix in the
meantime, restore this code to ginFreeScanKeys().
Also, add a similar pfree to where startScanEntry() is about to zero out
entry->list. I am not sure if there are any code paths where this
change prevents a leak today, but it seems like cheap future-proofing.
In passing, make the initial allocation of so->entries[] use palloc
not palloc0. The code doesn't depend on unused entries being zero;
if it did, the array-enlargement code in ginFillScanEntry() would be
wrong. So using palloc0 initially can only serve to confuse readers
about what the invariant is.
Per report from Felipe de Jesús Molina Bravo, via Jaime Casanova in
<CAJGNTeMR1ndMU2Thpr8GPDUfiHTV7idELJRFusA5UXUGY1y-eA@mail.gmail.com>
Tom Lane [Sun, 13 Mar 2016 05:21:07 +0000 (00:21 -0500)]
Report memory context stats upon out-of-memory in repalloc[_huge].
This longstanding functionality evidently got lost in commit
3d6d1b585524aab6. Noted while studying an OOM report from Jaime
Casanova. Backpatch to 9.5 where the bug was introduced.
Tom Lane [Sat, 12 Mar 2016 23:16:24 +0000 (18:16 -0500)]
Get rid of scribbling on a const variable in psql's print.c.
Commit
a2dabf0e1dda93c8 had the bright idea that it could modify a "const"
global variable if it merely casted away const from a pointer. This does
not work on platforms where the compiler puts "const" variables into
read-only storage. Depressingly, we evidently have no such platforms in
our buildfarm ... an oversight I have now remedied. (The one platform
that is known to catch this is recent OS X with -fno-common.)
Per report from Chris Ruprecht. Back-patch to 9.5 where the bogus
code was introduced.
Alvaro Herrera [Thu, 10 Mar 2016 16:15:08 +0000 (13:15 -0300)]
Document BRIN a bit more thoroughly
The chapter "Interfacing Extensions To Indexes" and CREATE OPERATOR
CLASS reference page were missed when BRIN was added. We document
all our other index access methods there, so make sure BRIN complies.
Author: Álvaro Herrera
Reported-By: Julien Rouhaud, Tom Lane
Reviewed-By: Emre Hasegeli
Discussion: https://www.postgresql.org/message-id/
56CF604E.
9000303%40dalibo.com
Backpatch: 9.5, where BRIN was introduced
Magnus Hagander [Thu, 10 Mar 2016 12:48:58 +0000 (13:48 +0100)]
Avoid crash on old Windows with AVX2-capable CPU for VS2013 builds
The Visual Studio 2013 CRT generates invalid code when it makes a 64-bit
build that is later used on a CPU that supports AVX2 instructions using a
version of Windows before 7SP1/2008R2SP1.
Detect this combination, and in those cases turn off the generation of
FMA3, per recommendation from the Visual Studio team.
The bug is actually in the CRT shipping with Visual Studio 2013, but
Microsoft have stated they're only fixing it in newer major versions.
The fix is therefor conditioned specifically on being built with this
version of Visual Studio, and not previous or later versions.
Author: Christian Ullrich
Andres Freund [Thu, 10 Mar 2016 02:53:53 +0000 (18:53 -0800)]
Avoid unlikely data-loss scenarios due to rename() without fsync.
Renaming a file using rename(2) is not guaranteed to be durable in face
of crashes. Use the previously added durable_rename()/durable_link_or_rename()
in various places where we previously just renamed files.
Most of the changed call sites are arguably not critical, but it seems
better to err on the side of too much durability. The most prominent
known case where the previously missing fsyncs could cause data loss is
crashes at the end of a checkpoint. After the actual checkpoint has been
performed, old WAL files are recycled. When they're filled, their
contents are fdatasynced, but we did not fsync the containing
directory. An OS/hardware crash in an unfortunate moment could then end
up leaving that file with its old name, but new content; WAL replay
would thus not replay it.
Reported-By: Tomas Vondra
Author: Michael Paquier, Tomas Vondra, Andres Freund
Discussion:
56583BDD.
9060302@2ndquadrant.com
Backpatch: All supported branches
Andres Freund [Thu, 10 Mar 2016 02:53:53 +0000 (18:53 -0800)]
Introduce durable_rename() and durable_link_or_rename().
Renaming a file using rename(2) is not guaranteed to be durable in face
of crashes; especially on filesystems like xfs and ext4 when mounted
with data=writeback. To be certain that a rename() atomically replaces
the previous file contents in the face of crashes and different
filesystems, one has to fsync the old filename, rename the file, fsync
the new filename, fsync the containing directory. This sequence is not
generally adhered to currently; which exposes us to data loss risks. To
avoid having to repeat this arduous sequence, introduce
durable_rename(), which wraps all that.
Also add durable_link_or_rename(). Several places use link() (with a
fallback to rename()) to rename a file, trying to avoid replacing the
target file out of paranoia. Some of those rename sequences need to be
durable as well. There seems little reason extend several copies of the
same logic, so centralize the link() callers.
This commit does not yet make use of the new functions; they're used in
a followup commit.
Author: Michael Paquier, Andres Freund
Discussion:
56583BDD.
9060302@2ndquadrant.com
Backpatch: All supported branches
Tom Lane [Wed, 9 Mar 2016 19:51:01 +0000 (14:51 -0500)]
Fix incorrect handling of NULL index entries in indexed ROW() comparisons.
An index search using a row comparison such as ROW(a, b) > ROW('x', 'y')
would stop upon reaching a NULL entry in the "b" column, ignoring the
fact that there might be non-NULL "b" values associated with later values
of "a". This happens because _bt_mark_scankey_required() marks the
subsidiary scankey for "b" as required, which is just wrong: it's for
a column after the one with the first inequality key (namely "a"), and
thus can't be considered a required match.
This bit of brain fade dates back to the very beginnings of our support
for indexed ROW() comparisons, in 2006. Kind of astonishing that no one
came across it before Glen Takahashi, in bug #14010.
Back-patch to all supported versions.
Note: the given test case doesn't actually fail in unpatched 9.1, evidently
because the fix for bug #6278 (i.e., stopping at nulls in either scan
direction) is required to make it fail. I'm sure I could devise a case
that fails in 9.1 as well, perhaps with something involving making a cursor
back up; but it doesn't seem worth the trouble.
Andres Freund [Wed, 9 Mar 2016 01:34:09 +0000 (17:34 -0800)]
Add valgrind suppressions for python code.
Python's allocator does some low-level tricks for efficiency;
unfortunately they trigger valgrind errors. Those tricks can be disabled
making instrumentation easier; but few people testing postgres will have
such a build of python. So add broad suppressions of the resulting
errors.
See also https://svn.python.org/projects/python/trunk/Misc/README.valgrind
This possibly will suppress valid errors, but without it it's basically
impossible to use valgrind with plpython code.
Author: Andres Freund
Backpatch: 9.4, where we started to maintain valgrind suppressions
Andres Freund [Wed, 9 Mar 2016 03:21:28 +0000 (19:21 -0800)]
Add valgrind suppressions for bootstrap related code.
Author: Andres Freund
Backpatch: 9.4, where we started to maintain valgrind suppressions
Andres Freund [Tue, 8 Mar 2016 22:59:29 +0000 (14:59 -0800)]
ltree: Zero padding bytes when allocating memory for externally visible data.
ltree/ltree_gist/ltxtquery's headers stores data at MAXALIGN alignment,
requiring some padding bytes. So far we left these uninitialized. Zero
those by using palloc0.
Author: Andres Freund
Reported-By: Andres Freund / valgrind / buildarm animal skink
Backpatch: 9.1-
Andres Freund [Tue, 8 Mar 2016 21:33:24 +0000 (13:33 -0800)]
plperl: Correctly handle empty arrays in plperl_ref_from_pg_array.
plperl_ref_from_pg_array() didn't consider the case that postgrs arrays
can have 0 dimensions (when they're empty) and accessed the first
dimension without a check. Fix that by special casing the empty array
case.
Author: Alex Hunsaker
Reported-By: Andres Freund / valgrind / buildfarm animal skink
Discussion:
20160308063240[email protected]
Backpatch: 9.1-
Robert Haas [Tue, 8 Mar 2016 19:30:12 +0000 (14:30 -0500)]
Update GetForeignPlan documentation.
Commit
385f337c9f39b21dca96ca4770552a10a6d5af24 added a new argument
to the FDW GetForeignPlan method, but failed to update the documentation
to match.
Etsuro Fujita
Tom Lane [Tue, 8 Mar 2016 02:52:30 +0000 (21:52 -0500)]
Fix minor typo in logical-decoding docs.
David Rowley
Andres Freund [Mon, 7 Mar 2016 22:24:52 +0000 (14:24 -0800)]
Further improvements to
c8f621c43.
Coverity and inspection for the issue addressed in
fd45d16f found some
questionable code.
Specifically coverity noticed that the wrong length was added in
ReorderBufferSerializeChange() - without immediate negative consequences
as the variable isn't used afterwards. During code-review and testing I
noticed that a bit of space was wasted when allocating tuple bufs in
several places. Thirdly, the debug memset()s in
ReorderBufferGetTupleBuf() reduce the error checking valgrind can do.
Backpatch: 9.4, like
c8f621c43.
Tom Lane [Mon, 7 Mar 2016 15:40:44 +0000 (10:40 -0500)]
Fix backwards test for Windows service-ness in pg_ctl.
A thinko in
a96761391 caused pg_ctl to get it exactly backwards when
deciding whether to report problems to the Windows eventlog or to stderr.
Per bug #14001 from Manuel Mathar, who also identified the fix.
Like the previous patch, back-patch to all supported branches.
Andres Freund [Mon, 7 Mar 2016 00:27:20 +0000 (16:27 -0800)]
Fix wrong allocation size in
c8f621c43.
In
c8f621c43 I forgot to account for MAXALIGN when allocating a new
tuplebuf in ReorderBufferGetTupleBuf(). That happens to currently not
cause active problems on a number of platforms because the affected
pointer is already aligned, but others, like ppc and hppa, trigger this
in the regression test, due to a debug memset clearing memory.
Fix that.
Backpatch: 9.4, like the previous commit.
Tom Lane [Mon, 7 Mar 2016 00:21:03 +0000 (19:21 -0500)]
Fix not-terribly-safe coding in NIImportOOAffixes() and NIImportAffixes().
There were two places in spell.c that supposed that they could search
for a location in a string produced by lowerstr() and then transpose
the offset into the original string. But this fails completely if
lowerstr() transforms any characters into characters of different byte
length, as can happen in Turkish UTF8 for instance.
We'd added some comments about this coding in commit
51e78ab4ff328296,
but failed to realize that it was not merely confusing but wrong.
Coverity complained about this code years ago, but in such an opaque
fashion that nobody understood what it was on about. I'm not entirely
sure that this issue *is* what it's on about, actually, but perhaps
this patch will shut it up -- and in any case the problem is clear.
Back-patch to all supported branches.
Magnus Hagander [Sun, 6 Mar 2016 11:25:47 +0000 (12:25 +0100)]
Fix typos
Author: Guillaume Lelarge
Andres Freund [Sun, 6 Mar 2016 02:02:20 +0000 (18:02 -0800)]
logical decoding: Fix handling of large old tuples with replica identity full.
When decoding the old version of an UPDATE or DELETE change, and if that
tuple was bigger than MaxHeapTupleSize, we either Assert'ed out, or
failed in more subtle ways in non-assert builds. Normally individual
tuples aren't bigger than MaxHeapTupleSize, with big datums toasted.
But that's not the case for the old version of a tuple for logical
decoding; the replica identity is logged as one piece. With the default
replica identity btree limits that to small tuples, but that's not the
case for FULL.
Change the tuple buffer infrastructure to separate allocate over-large
tuples, instead of always going through the slab cache.
This unfortunately requires changing the ReorderBufferTupleBuf
definition, we need to store the allocated size someplace. To avoid
requiring output plugins to recompile, don't store HeapTupleHeaderData
directly after HeapTupleData, but point to it via t_data; that leaves
rooms for the allocated size. As there's no reason for an output plugin
to look at ReorderBufferTupleBuf->t_data.header, remove the field. It
was just a minor convenience having it directly accessible.
Reported-By: Adam Dratwiński
Discussion: CAKg6ypLd7773AOX4DiOGRwQk1TVOQKhNwjYiVjJnpq8Wo+i62Q@mail.gmail.com