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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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><BLOCKQUOTE
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><P
><B
>Release Date: </B
>2007-02-05</P
></BLOCKQUOTE
></DIV
><P
> This release contains a variety of fixes from 8.1.6, including
a security fix.
For information about new features in the 8.1 major release, see
<A
HREF="release-8-1.html"
>Section E.174</A
>.
</P
><DIV
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><H2
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><A
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></H2
><P
> A dump/restore is not required for those running 8.1.X.
However, if you are upgrading from a version earlier than 8.1.2,
see <A
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>Section E.172</A
>.
</P
></DIV
><DIV
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><H2
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></H2
><P
></P
><UL
><LI
><P
> Remove security vulnerabilities that allowed connected users
to read backend memory (Tom)
</P
><P
> The vulnerabilities involve suppressing the normal check that a SQL
function returns the data type it's declared to, and changing the
data type of a table column (CVE-2007-0555, CVE-2007-0556). These
errors can easily be exploited to cause a backend crash, and in
principle might be used to read database content that the user
should not be able to access.
</P
></LI
><LI
><P
> Fix rare bug wherein btree index page splits could fail
due to choosing an infeasible split point (Heikki Linnakangas)
</P
></LI
><LI
><P
> Improve <TT
CLASS="COMMAND"
>VACUUM</TT
> performance for databases with many tables (Tom)
</P
></LI
><LI
><P
> Fix autovacuum to avoid leaving non-permanent transaction IDs in
non-connectable databases (Alvaro)
</P
><P
> This bug affects the 8.1 branch only.
</P
></LI
><LI
><P
> Fix for rare Assert() crash triggered by <TT
CLASS="LITERAL"
>UNION</TT
> (Tom)
</P
></LI
><LI
><P
> Tighten security of multi-byte character processing for UTF8 sequences
over three bytes long (Tom)
</P
></LI
><LI
><P
> Fix bogus <SPAN
CLASS="QUOTE"
>"permission denied"</SPAN
> failures occurring on Windows
due to attempts to fsync already-deleted files (Magnus, Tom)
</P
></LI
><LI
><P
> Fix possible crashes when an already-in-use PL/pgSQL function is
updated (Tom)
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