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>E.46. Release 9.2.24</A
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><DIV
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><P
><B
>Release date: </B
>2017-11-09</P
></DIV
><P
> This release contains a variety of fixes from 9.2.23.
For information about new features in the 9.2 major release, see
<A
HREF="release-9-2.html"
>Section E.70</A
>.
</P
><P
> This is expected to be the last <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
release in the 9.2.X series. Users are encouraged to update to a newer
release branch soon.
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><A
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>E.46.1. Migration to Version 9.2.24</A
></H2
><P
> A dump/restore is not required for those running 9.2.X.
</P
><P
> However, if you are upgrading from a version earlier than 9.2.22,
see <A
HREF="release-9-2-22.html"
>Section E.48</A
>.
</P
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><H2
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><A
NAME="AEN128434"
>E.46.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Fix sample server-start scripts to become <TT
CLASS="LITERAL"
>$PGUSER</TT
>
before opening <TT
CLASS="LITERAL"
>$PGLOG</TT
> (Noah Misch)
</P
><P
> Previously, the postmaster log file was opened while still running as
root. The database owner could therefore mount an attack against
another system user by making <TT
CLASS="LITERAL"
>$PGLOG</TT
> be a symbolic
link to some other file, which would then become corrupted by appending
log messages.
</P
><P
> By default, these scripts are not installed anywhere. Users who have
made use of them will need to manually recopy them, or apply the same
changes to their modified versions. If the
existing <TT
CLASS="LITERAL"
>$PGLOG</TT
> file is root-owned, it will need to
be removed or renamed out of the way before restarting the server with
the corrected script.
(CVE-2017-12172)
</P
></LI
><LI
><P
> Properly reject attempts to convert infinite float values to
type <TT
CLASS="TYPE"
>numeric</TT
> (Tom Lane, KaiGai Kohei)
</P
><P
> Previously the behavior was platform-dependent.
</P
></LI
><LI
><P
> Fix corner-case crashes when columns have been added to the end of a
view (Tom Lane)
</P
></LI
><LI
><P
> Record proper dependencies when a view or rule
contains <TT
CLASS="STRUCTNAME"
>FieldSelect</TT
>
or <TT
CLASS="STRUCTNAME"
>FieldStore</TT
> expression nodes (Tom Lane)
</P
><P
> Lack of these dependencies could allow a column or data
type <TT
CLASS="COMMAND"
>DROP</TT
> to go through when it ought to fail,
thereby causing later uses of the view or rule to get errors.
This patch does not do anything to protect existing views/rules,
only ones created in the future.
</P
></LI
><LI
><P
> Correctly detect hashability of range data types (Tom Lane)
</P
><P
> The planner mistakenly assumed that any range type could be hashed
for use in hash joins or hash aggregation, but actually it must check
whether the range's subtype has hash support. This does not affect any
of the built-in range types, since they're all hashable anyway.
</P
></LI
><LI
><P
> Fix low-probability loss of <TT
CLASS="COMMAND"
>NOTIFY</TT
> messages due to
XID wraparound (Marko Tiikkaja, Tom Lane)
</P
><P
> If a session executed no queries, but merely listened for
notifications, for more than 2 billion transactions, it started to miss
some notifications from concurrently-committing transactions.
</P
></LI
><LI
><P
> Prevent low-probability crash in processing of nested trigger firings
(Tom Lane)
</P
></LI
><LI
><P
> Correctly restore the umask setting when file creation fails
in <TT
CLASS="COMMAND"
>COPY</TT
> or <CODE
CLASS="FUNCTION"
>lo_export()</CODE
>
(Peter Eisentraut)
</P
></LI
><LI
><P
> Give a better error message for duplicate column names
in <TT
CLASS="COMMAND"
>ANALYZE</TT
> (Nathan Bossart)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> to not require user's home
directory to exist (Tom Lane)
</P
><P
> In v10, failure to find the home directory while trying to
read <TT
CLASS="FILENAME"
>~/.pgpass</TT
> was treated as a hard error,
but it should just cause that file to not be found. Both v10 and
previous release branches made the same mistake when
reading <TT
CLASS="FILENAME"
>~/.pg_service.conf</TT
>, though this was less
obvious since that file is not sought unless a service name is
specified.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> to guard against integer
overflow in the row count of a <TT
CLASS="STRUCTNAME"
>PGresult</TT
>
(Michael Paquier)
</P
></LI
><LI
><P
> Sync our copy of the timezone library with IANA release tzcode2017c
(Tom Lane)
</P
><P
> This fixes various issues; the only one likely to be user-visible
is that the default DST rules for a POSIX-style zone name, if
no <TT
CLASS="FILENAME"
>posixrules</TT
> file exists in the timezone data
directory, now match current US law rather than what it was a dozen
years ago.
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
>
release 2017c for DST law changes in Fiji, Namibia, Northern Cyprus,
Sudan, Tonga, and Turks & Caicos Islands, plus historical
corrections for Alaska, Apia, Burma, Calcutta, Detroit, Ireland,
Namibia, and Pago Pago.
</P
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