Import perl5281delta.pod

(manually cherry picked from commit 43323ad1f893493cf772c75d969510cc929db3bc)

4 files changed, 147 insertions, 0 deletions

diff --git a/MANIFEST b/MANIFEST
index 52eb647503..578a390f2c 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -4945,6 +4945,7 @@ pod/perl5261delta.pod		Perl changes in version 5.26.1
 pod/perl5262delta.pod		Perl changes in version 5.26.2
 pod/perl5263delta.pod		Perl changes in version 5.26.3
 pod/perl5280delta.pod		Perl changes in version 5.28.0
+pod/perl5281delta.pod		Perl changes in version 5.28.1
 pod/perl561delta.pod		Perl changes in version 5.6.1
 pod/perl56delta.pod		Perl changes in version 5.6
 pod/perl581delta.pod		Perl changes in version 5.8.1
diff --git a/pod/perl.pod b/pod/perl.pod
index cbe05b0bc4..6008e4a603 100644
--- a/pod/perl.pod
+++ b/pod/perl.pod
@@ -181,6 +181,7 @@ aux h2ph h2xs perlbug pl2pm pod2html pod2man splain xsubpp
 
     perlhist		Perl history records
     perldelta		Perl changes since previous version
+    perl5281delta	Perl changes in version 5.28.1
     perl5280delta	Perl changes in version 5.28.0
     perl5263delta	Perl changes in version 5.26.3
     perl5262delta	Perl changes in version 5.26.2
diff --git a/pod/perl5281delta.pod b/pod/perl5281delta.pod
new file mode 100644
index 0000000000..2153e40c4f
--- /dev/null
+++ b/pod/perl5281delta.pod
@@ -0,0 +1,141 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5281delta - what is new for perl v5.28.1
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.28.0 release and the 5.28.1
+release.
+
+If you are upgrading from an earlier release such as 5.26.0, first read
+L<perl5280delta>, which describes differences between 5.26.0 and 5.28.0.
+
+=head1 Security
+
+=head2 [CVE-2018-18311] Integer overflow leading to buffer overflow and segmentation fault
+
+Integer arithmetic in C<Perl_my_setenv()> could wrap when the combined length
+of the environment variable name and value exceeded around 0x7fffffff.  This
+could lead to writing beyond the end of an allocated buffer with attacker
+supplied data.
+
+L<[perl #133204]|https://rt.perl.org/Ticket/Display.html?id=133204>
+
+=head2 [CVE-2018-18312] Heap-buffer-overflow write in S_regatom (regcomp.c)
+
+A crafted regular expression could cause heap-buffer-overflow write during
+compilation, potentially allowing arbitrary code execution.
+
+L<[perl #133423]|https://rt.perl.org/Ticket/Display.html?id=133423>
+
+=head1 Incompatible Changes
+
+There are no changes intentionally incompatible with 5.28.0.  If any exist,
+they are bugs, and we request that you submit a report.  See
+L</Reporting Bugs> below.
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20180622 to 5.20181129_28.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+Perl 5.28 introduced an C<index()> optimization when comparing to -1 (or
+indirectly, e.g. >= 0).  When this optimization was triggered inside a C<when>
+clause it caused a warning ("Argument %s isn't numeric in smart match").  This
+has now been fixed.
+L<[perl #133368]|https://rt.perl.org/Ticket/Display.html?id=133368>
+
+=item *
+
+Matching of decimal digits in script runs, introduced in Perl 5.28, had a bug
+that led to C<"1\N{THAI DIGIT FIVE}"> matching C</^(*sr:\d+)$/> when it should
+not.  This has now been fixed.
+
+=item *
+
+The new in-place editing code no longer leaks directory handles.
+L<[perl #133314]|https://rt.perl.org/Ticket/Display.html?id=133314>
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.28.1 represents approximately 5 months of development since Perl 5.28.0
+and contains approximately 6,100 lines of changes across 44 files from 12
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 700 lines of changes to 12 .pm, .t, .c and .h files.
+
+Perl continues to flourish into its fourth decade thanks to a vibrant community
+of users and developers.  The following people are known to have contributed
+the improvements that became Perl 5.28.1:
+
+Aaron Crane, Abigail, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, David
+Mitchell, James E Keenan, John SJ Anderson, Karen Etheridge, Karl Williamson,
+Sawyer X, Steve Hay, Tony Cook.
+
+The list above is almost certainly incomplete as it is automatically generated
+from version control history.  In particular, it does not include the names of
+the (very much appreciated) contributors who reported issues to the Perl bug
+tracker.
+
+Many of the changes included in this version originated in the CPAN modules
+included in Perl's core.  We're grateful to the entire CPAN community for
+helping Perl to flourish.
+
+For a more complete list of all of Perl's historical contributors, please see
+the F<AUTHORS> file in the Perl source distribution.
+
+=head1 Reporting Bugs
+
+If you find what you think is a bug, you might check the perl bug database
+at L<https://rt.perl.org/> .  There may also be information at
+L<http://www.perl.org/> , the Perl Home Page.
+
+If you believe you have an unreported bug, please run the L<perlbug> program
+included with your release.  Be sure to trim your bug down to a tiny but
+sufficient test case.  Your bug report, along with the output of C<perl -V>,
+will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
+
+If the bug you are reporting has security implications which make it
+inappropriate to send to a publicly archived mailing list, then see
+L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
+for details of how to report the issue.
+
+=head1 Give Thanks
+
+If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
+you can do so by running the C<perlthanks> program:
+
+    perlthanks
+
+This will send an email to the Perl 5 Porters list with your show of thanks.
+
+=head1 SEE ALSO
+
+The F<Changes> file for an explanation of how to view exhaustive details on
+what changed.
+
+The F<INSTALL> file for how to build Perl.
+
+The F<README> file for general stuff.
+
+The F<Artistic> and F<Copying> files for copyright information.
+
+=cut
diff --git a/win32/pod.mak b/win32/pod.mak
index c3f0736869..08a671b840 100644
--- a/win32/pod.mak
+++ b/win32/pod.mak
@@ -56,6 +56,7 @@ POD = perl.pod	\
 	perl5263delta.pod	\
 	perl5264delta.pod	\
 	perl5280delta.pod	\
+	perl5281delta.pod	\
 	perl561delta.pod	\
 	perl56delta.pod	\
 	perl581delta.pod	\
@@ -207,6 +208,7 @@ MAN = perl.man	\
 	perl5263delta.man	\
 	perl5264delta.man	\
 	perl5280delta.man	\
+	perl5281delta.man	\
 	perl561delta.man	\
 	perl56delta.man	\
 	perl581delta.man	\
@@ -357,6 +359,7 @@ HTML = perl.html	\
 	perl5263delta.html	\
 	perl5264delta.html	\
 	perl5280delta.html	\
+	perl5281delta.html	\
 	perl561delta.html	\
 	perl56delta.html	\
 	perl581delta.html	\
@@ -508,6 +511,7 @@ TEX = perl.tex	\
 	perl5263delta.tex	\
 	perl5264delta.tex	\
 	perl5280delta.tex	\
+	perl5281delta.tex	\
 	perl561delta.tex	\
 	perl56delta.tex	\
 	perl581delta.tex	\