illumos gate

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-25032

Our copy of zlib is maintained in https://github.com/illumos/zlib, this update is based on illumos/zlib-1.2.12 branch.

Testing done: build/install/boot. Before boot I did create dataset with compression=gzip, put some files on it and confirmed access from both loader and zfs. Also loader is able to process gzipped boot_archive (uncompressed in memory by loader before we jump to kernel).

zfs-tests. Since there are many failing tests, I did pick up only compression in file names:

[/opt/zfs-tests/tests/functional/acl/trivial]
tests = ['zfs_acl_compress_001_pos']

[/opt/zfs-tests/tests/functional/cli_root/zdb]
tests = ['zdb_001_neg', 'zdb_002_pos', 'zdb_003_pos', 'zdb_004_pos',
    'zdb_005_pos', 'zdb_decompress_zstd']
pre =
post =

[/opt/zfs-tests/tests/functional/cli_root/zfs_set]
tests = ['compression_001_pos']

[/opt/zfs-tests/tests/functional/compression]
tests = ['compress_001_pos', 'compress_002_pos', 'compress_003_pos',
    'compress_004_pos', 'compress_zstd_bswap', 'l2arc_compressed_arc',
    'l2arc_compressed_arc_disabled', 'l2arc_encrypted',
    'l2arc_encrypted_no_compressed_arc']

[/opt/zfs-tests/tests/functional/nopwrite]
tests = ['nopwrite_varying_compression']

[/opt/zfs-tests/tests/functional/rsend]
tests = ['send-c_mixed_compression']

The result is:

Results Summary
PASS      25

Running Time:   00:05:33
Percent passed: 100.0%
Log directory:  /var/tmp/test_results/20220408T163401
tsoome@test:~$