Previously, TOAST tables only required in the new cluster could cause
oid conflicts if they were auto-numbered and a later conflicting oid had
to be assigned.
Backpatch through 9.3
autovacuum_multixact_freeze_max_age was added as a pg_ctl start
parameter in 9.3.X to prevent autovacuum from running. However, only
some 9.3.X releases have autovacuum_multixact_freeze_max_age as it was
added in a minor PG 9.3 release. It also isn't needed because -b turns
off autovacuum in 9.1+.
Without this fix, trying to upgrade from an early 9.3 release to 9.4
would fail.
Report by EDB
Backpatch through 9.3
Previously, when calculations on the need for toast tables changed,
pg_upgrade could not handle cases where the new cluster needed a TOAST
table and the old cluster did not. (It already handled the opposite
case.) This fixes the "OID mismatch" error typically generated in this
case.
Backpatch through 9.2
The isxdigit() calls relied on undefined behavior. The isascii() call
was well-defined, but our prevailing style is to include the cast.
Back-patch to 9.4, where the isxdigit() calls were introduced.
Historically these database properties could be manipulated only by
manually updating pg_database, which is error-prone and only possible for
superusers. But there seems no good reason not to allow database owners to
set them for their databases, so invent CREATE/ALTER DATABASE options to do
that. Adjust a couple of places that were doing it the hard way to use the
commands instead.
Vik Fearing, reviewed by Pavel Stehule
There were some C comments that hadn't been updated from the switch of
using only pg_dumpall to using pg_dump and pg_dumpall, so update them.
Also, don't bother using --schema-only for pg_dumpall --globals-only.
Backpatch through 9.4
This fixes a bug that caused vacuum to fail when the '0000' files left
by initdb were accessed as part of vacuum's cleanup of old pg_multixact
files.
Backpatch through 9.3
Any OS user able to access the socket can connect as the bootstrap
superuser and proceed to execute arbitrary code as the OS user running
the test. Protect against that by placing the socket in a temporary,
mode-0700 subdirectory of /tmp. The pg_regress-based test suites and
the pg_upgrade test suite were vulnerable; the $(prove_check)-based test
suites were already secure. Back-patch to 8.4 (all supported versions).
The hazard remains wherever the temporary cluster accepts TCP
connections, notably on Windows.
As a convenient side effect, this lets testing proceed smoothly in
builds that override DEFAULT_PGSOCKET_DIR. Popular non-default values
like /var/run/postgresql are often unwritable to the build user.
Security: CVE-2014-0067
It's easy to forget using SYSTEMQUOTEs when constructing command strings
for system() or popen(). Even if we fix all the places missing it now, it is
bound to be forgotten again in the future. Introduce wrapper functions that
do the the extra quoting for you, and get rid of SYSTEMQUOTEs in all the
callers.
We previosly used SYSTEMQUOTEs in all the hard-coded command strings, and
this doesn't change the behavior of those. But user-supplied commands, like
archive_command, restore_command, COPY TO/FROM PROGRAM calls, as well as
pgbench's \shell, will now gain an extra pair of quotes. That is desirable,
but if you have existing scripts or config files that include an extra
pair of quotes, those might need to be adjusted.
Reviewed by Amit Kapila and Tom Lane
Some popen() calls were missing SYSTEMQUOTEs, which caused initdb and
pg_upgrade to fail on Windows, if the installation path contained both
spaces and @ signs.
Patch by Nikhil Deshpande. Backpatch to all supported versions.
Non-existent tablespace directory references can occur if user
tablespaces are created inside data directories and the data directory
is renamed in preparation for running pg_upgrade, and the symbolic links
are not updated.
Backpatch to 9.3.
Add vacuumdb option --analyze-in-stages which runs ANALYZE three times
with different configuration settings, adopting the logic from the
analyze_new_cluster.sh script that pg_upgrade generates. That way,
users of pg_dump/pg_restore can also use that functionality.
Change pg_upgrade to create the script so that it calls vacuumdb instead
of implementing the logic itself.
Any OS user able to access the socket can connect as the bootstrap
superuser and in turn execute arbitrary code as the OS user running the
test. Protect against that by placing the socket in the temporary data
directory, which has mode 0700 thanks to initdb. Back-patch to 8.4 (all
supported versions). The hazard remains wherever the temporary cluster
accepts TCP connections, notably on Windows.
Attempts to run "make check" from a directory with a long name will now
fail. An alternative not sharing that problem was to place the socket
in a subdirectory of /tmp, but that is only secure if /tmp is sticky.
The PG_REGRESS_SOCK_DIR environment variable is available as a
workaround when testing from long directory paths.
As a convenient side effect, this lets testing proceed smoothly in
builds that override DEFAULT_PGSOCKET_DIR. Popular non-default values
like /var/run/postgresql are often unwritable to the build user.
Security: CVE-2014-0067
I discovered the hard way that on some old shells, the locution
FOO="" unset FOO
does not behave the same as
FOO=""; unset FOO
and in fact leaves FOO set to an empty string. test.sh was inconsistently
spelling it different ways on adjacent lines.
This got broken relatively recently, in commit c737a2e56, so the lack of
field reports to date doesn't represent a lot of evidence that the problem
is rare.
We used to have externs for getopt() and its API variables scattered
all over the place. Now that we find we're going to need to tweak the
variable declarations for Cygwin, it seems like a good idea to have
just one place to tweak.
In this commit, the variables are declared "#ifndef HAVE_GETOPT_H".
That may or may not work everywhere, but we'll soon find out.
Andres Freund
The buildfarm says commit 58274728fb doesn't
work so well on Windows. This is because the encoding part of Windows
locale names can be just a code page number, eg "1252", which we don't
consider to be a valid encoding name. Add a check to accept encoding
parts that are case-insensitively string equal; this at least ensures
that the new code doesn't reject any cases that the old code allowed.
Even though the server tries to canonicalize stored locale names, the
platform often doesn't cooperate, so it's entirely possible that one DB
thinks its locale is, say, "en_US.UTF-8" while the other has "en_US.utf8".
Rather than failing, we should try to allow this where it's clearly OK.
There is already pretty robust encoding lookup in encnames.c, so make
use of that to compare the encoding parts of the names. The locale
identifier parts are just compared case-insensitively, which we were
already doing. The major problem known to exist in the field is variant
encoding-name spellings, so hopefully this will be Good Enough. If not,
we can try being even laxer.
Pavel Raiskup, reviewed by Rushabh Lathia
Bruce Momjian