libz sync with develop branch, discussed with deraadt

Apart from cosmetics, this includes the following commits:

Add LIT_MEM define to use more memory for a small deflate speedup.

A bug fix in zlib 1.2.12 resulted in a slight slowdown (1-2%) of
deflate. This commit provides the option to #define LIT_MEM, which
uses more memory to reverse most of that slowdown. The memory for
the pending buffer and symbol buffers is increased by 25%, which
increases the total memory usage with the default parameters by
about 6%.

https://github.com/madler/zlib/commit/ac8f12c97d1afd9bafa9c710f827d40a407d3266

Fix bug in inflateSync() for data held in bit buffer.

https://github.com/madler/zlib/commit/5af7cef45eeef86ddf6ab00b4e363c1eecaf47b6

Update libz to the HEAD of the develop branch

This mostly moves from K&R prototypes to ANSI prototypes and includes a
handful of bug fixes that are nice to have. The corresponding sys commit
will allow us to undo some hacks that jca applied to make the kernel build
with clang 15.

discussed with deraadt

Drop RCS ids in upstream zlib source

We're not maintaining a this as a fork, it's upstream source with a handful
of patches. Thus, the RCS ids aren't particularly useful or important. They
are a bit of a maintenance burden and generate noise in diffs.

ok kn, no objection millert, "kill" guess who

Update base libz to 1.2.13

This update contains a few bugfixes (some of which we have already
backported to 1.2.12) and a ton of cosmetic changes. The relevant
bits of the ChangeLog are:

- Repair prototypes and exporting of new CRC functions
- Have infback() deliver all of the available output up to any error
- Fix a bug when getting a gzip header extra field with inflate()
- Fix bug in block type selection when Z_FIXED used
- Tighten deflateBound bounds
- Remove deleted assembler code references
- Various portability and appearance improvements

Tested on amd64 and arm64 by me and on sparc64 by kn.

Adjust whitespace (tabs vs spaces) on one line to reduce diff with upstream

Fix buffer overflow in inflateGetHeader()

This is the initial fix combined with a fix for a NULL deref introduced
in the initial fix.

ok millert, help from tj

commit eff308af425b67093bab25f80f1ae950166bece1
Author: Mark Adler <fork@madler.net>
Date: Sat Jul 30 15:51:11 2022 -0700

Fix a bug when getting a gzip header extra field with inflate().

If the extra field was larger than the space the user provided with
inflateGetHeader(), and if multiple calls of inflate() delivered
the extra header data, then there could be a buffer overflow of the
provided space. This commit assures that provided space is not
exceeded.

https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

commit 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (HEAD -> develop, origin/develop)
Author: Mark Adler <fork@madler.net>
Date: Mon Aug 8 10:50:09 2022 -0700

Fix extra field processing bug that dereferences NULL state->head.

The recent commit to fix a gzip header extra field processing bug
introduced the new bug fixed here.

https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d

Update to zlib 1.2.12

Build tests by myself for amd64 and arm64, sthen and inoguchi for i386
and gkoehler for macppc and powerpc64, thanks!

Detailed changelog is part of the committed diff.

branches: 1.11.2; 1.11.4;
Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Update libz to the HEAD of the develop branch

This mostly moves from K&R prototypes to ANSI prototypes and includes a
handful of bug fixes that are nice to have. The corresponding sys commit
will allow us to undo some hacks that jca applied to make the kernel build
with clang 15.

discussed with deraadt

Drop RCS ids in upstream zlib source

We're not maintaining a this as a fork, it's upstream source with a handful
of patches. Thus, the RCS ids aren't particularly useful or important. They
are a bit of a maintenance burden and generate noise in diffs.

ok kn, no objection millert, "kill" guess who

Update base libz to 1.2.13

This update contains a few bugfixes (some of which we have already
backported to 1.2.12) and a ton of cosmetic changes. The relevant
bits of the ChangeLog are:

- Repair prototypes and exporting of new CRC functions
- Have infback() deliver all of the available output up to any error
- Fix a bug when getting a gzip header extra field with inflate()
- Fix bug in block type selection when Z_FIXED used
- Tighten deflateBound bounds
- Remove deleted assembler code references
- Various portability and appearance improvements

Tested on amd64 and arm64 by me and on sparc64 by kn.

Adjust whitespace (tabs vs spaces) on one line to reduce diff with upstream

Fix buffer overflow in inflateGetHeader()

This is the initial fix combined with a fix for a NULL deref introduced
in the initial fix.

ok millert, help from tj

commit eff308af425b67093bab25f80f1ae950166bece1
Author: Mark Adler <fork@madler.net>
Date: Sat Jul 30 15:51:11 2022 -0700

Fix a bug when getting a gzip header extra field with inflate().

If the extra field was larger than the space the user provided with
inflateGetHeader(), and if multiple calls of inflate() delivered
the extra header data, then there could be a buffer overflow of the
provided space. This commit assures that provided space is not
exceeded.

https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

commit 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (HEAD -> develop, origin/develop)
Author: Mark Adler <fork@madler.net>
Date: Mon Aug 8 10:50:09 2022 -0700

Fix extra field processing bug that dereferences NULL state->head.

The recent commit to fix a gzip header extra field processing bug
introduced the new bug fixed here.

https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d

Update to zlib 1.2.12

Build tests by myself for amd64 and arm64, sthen and inoguchi for i386
and gkoehler for macppc and powerpc64, thanks!

Detailed changelog is part of the committed diff.

branches: 1.11.2; 1.11.4;
Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Drop RCS ids in upstream zlib source

We're not maintaining a this as a fork, it's upstream source with a handful
of patches. Thus, the RCS ids aren't particularly useful or important. They
are a bit of a maintenance burden and generate noise in diffs.

ok kn, no objection millert, "kill" guess who

Update base libz to 1.2.13

This update contains a few bugfixes (some of which we have already
backported to 1.2.12) and a ton of cosmetic changes. The relevant
bits of the ChangeLog are:

- Repair prototypes and exporting of new CRC functions
- Have infback() deliver all of the available output up to any error
- Fix a bug when getting a gzip header extra field with inflate()
- Fix bug in block type selection when Z_FIXED used
- Tighten deflateBound bounds
- Remove deleted assembler code references
- Various portability and appearance improvements

Tested on amd64 and arm64 by me and on sparc64 by kn.

Adjust whitespace (tabs vs spaces) on one line to reduce diff with upstream

Fix buffer overflow in inflateGetHeader()

This is the initial fix combined with a fix for a NULL deref introduced
in the initial fix.

ok millert, help from tj

commit eff308af425b67093bab25f80f1ae950166bece1
Author: Mark Adler <fork@madler.net>
Date: Sat Jul 30 15:51:11 2022 -0700

Fix a bug when getting a gzip header extra field with inflate().

If the extra field was larger than the space the user provided with
inflateGetHeader(), and if multiple calls of inflate() delivered
the extra header data, then there could be a buffer overflow of the
provided space. This commit assures that provided space is not
exceeded.

https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

commit 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (HEAD -> develop, origin/develop)
Author: Mark Adler <fork@madler.net>
Date: Mon Aug 8 10:50:09 2022 -0700

Fix extra field processing bug that dereferences NULL state->head.

The recent commit to fix a gzip header extra field processing bug
introduced the new bug fixed here.

https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d

Update to zlib 1.2.12

Build tests by myself for amd64 and arm64, sthen and inoguchi for i386
and gkoehler for macppc and powerpc64, thanks!

Detailed changelog is part of the committed diff.

branches: 1.11.2; 1.11.4;
Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Update base libz to 1.2.13

This update contains a few bugfixes (some of which we have already
backported to 1.2.12) and a ton of cosmetic changes. The relevant
bits of the ChangeLog are:

- Repair prototypes and exporting of new CRC functions
- Have infback() deliver all of the available output up to any error
- Fix a bug when getting a gzip header extra field with inflate()
- Fix bug in block type selection when Z_FIXED used
- Tighten deflateBound bounds
- Remove deleted assembler code references
- Various portability and appearance improvements

Tested on amd64 and arm64 by me and on sparc64 by kn.

Adjust whitespace (tabs vs spaces) on one line to reduce diff with upstream

Fix buffer overflow in inflateGetHeader()

This is the initial fix combined with a fix for a NULL deref introduced
in the initial fix.

ok millert, help from tj

commit eff308af425b67093bab25f80f1ae950166bece1
Author: Mark Adler <fork@madler.net>
Date: Sat Jul 30 15:51:11 2022 -0700

Fix a bug when getting a gzip header extra field with inflate().

If the extra field was larger than the space the user provided with
inflateGetHeader(), and if multiple calls of inflate() delivered
the extra header data, then there could be a buffer overflow of the
provided space. This commit assures that provided space is not
exceeded.

https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

commit 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (HEAD -> develop, origin/develop)
Author: Mark Adler <fork@madler.net>
Date: Mon Aug 8 10:50:09 2022 -0700

Fix extra field processing bug that dereferences NULL state->head.

The recent commit to fix a gzip header extra field processing bug
introduced the new bug fixed here.

https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d

Update to zlib 1.2.12

Build tests by myself for amd64 and arm64, sthen and inoguchi for i386
and gkoehler for macppc and powerpc64, thanks!

Detailed changelog is part of the committed diff.

branches: 1.11.2; 1.11.4;
Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Adjust whitespace (tabs vs spaces) on one line to reduce diff with upstream

Fix buffer overflow in inflateGetHeader()

This is the initial fix combined with a fix for a NULL deref introduced
in the initial fix.

ok millert, help from tj

commit eff308af425b67093bab25f80f1ae950166bece1
Author: Mark Adler <fork@madler.net>
Date: Sat Jul 30 15:51:11 2022 -0700

Fix a bug when getting a gzip header extra field with inflate().

If the extra field was larger than the space the user provided with
inflateGetHeader(), and if multiple calls of inflate() delivered
the extra header data, then there could be a buffer overflow of the
provided space. This commit assures that provided space is not
exceeded.

https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

commit 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (HEAD -> develop, origin/develop)
Author: Mark Adler <fork@madler.net>
Date: Mon Aug 8 10:50:09 2022 -0700

Fix extra field processing bug that dereferences NULL state->head.

The recent commit to fix a gzip header extra field processing bug
introduced the new bug fixed here.

https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d

Update to zlib 1.2.12

Build tests by myself for amd64 and arm64, sthen and inoguchi for i386
and gkoehler for macppc and powerpc64, thanks!

Detailed changelog is part of the committed diff.

branches: 1.11.2; 1.11.4;
Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Fix buffer overflow in inflateGetHeader()

This is the initial fix combined with a fix for a NULL deref introduced
in the initial fix.

ok millert, help from tj

commit eff308af425b67093bab25f80f1ae950166bece1
Author: Mark Adler <fork@madler.net>
Date: Sat Jul 30 15:51:11 2022 -0700

Fix a bug when getting a gzip header extra field with inflate().

If the extra field was larger than the space the user provided with
inflateGetHeader(), and if multiple calls of inflate() delivered
the extra header data, then there could be a buffer overflow of the
provided space. This commit assures that provided space is not
exceeded.

https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

commit 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (HEAD -> develop, origin/develop)
Author: Mark Adler <fork@madler.net>
Date: Mon Aug 8 10:50:09 2022 -0700

Fix extra field processing bug that dereferences NULL state->head.

The recent commit to fix a gzip header extra field processing bug
introduced the new bug fixed here.

https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d

Update to zlib 1.2.12

Build tests by myself for amd64 and arm64, sthen and inoguchi for i386
and gkoehler for macppc and powerpc64, thanks!

Detailed changelog is part of the committed diff.

Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Update to zlib 1.2.12

Build tests by myself for amd64 and arm64, sthen and inoguchi for i386
and gkoehler for macppc and powerpc64, thanks!

Detailed changelog is part of the committed diff.

Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Fix warnings when building zlib with ZLIB_CONST defined

Probably not very useful (given the lack of feedback) but feels more
correct. Kernel part tested with option ZLIB_CONST.

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3

Update to zlib 1.2.3; OK deraadt@

update to zlib-1.21 (we already have the CAN-2004-0797 security fixes)
"in it goes" deraadt@, in the near-total absence of feedback from others

Fix for DoS caused by incorrect error handling. From Dmitry V. Levin.
ok miller@ henning@

branches: 1.6.2;
sync with sys/lib/libz; adds #ifdef SMALL and one more #ifndef SLOW
henning@ OK

#ifndef SLOW for consistency with sys/lib/libz/, not used for now;
millert@ agrees

update to zlib 1.2.1

ok millert@ deraadt@

Update to zlib-1.1.4

branches: 1.2.14;
zlib 1.1.3

Integrate zlib v1.0.3