[Bug #18358] Fix crash in zlib when in progress #35
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Redmine ticket: https://bugs.ruby-lang.org/issues/18358
zlib has a use-after-free when
Zlib::Inflate#inflate
orZlib::Deflate#deflate
is called recursively. The following script demonstrates the issue.If we run Ruby master (commit b680b632e5b88e4ea550de3f15cf6ef782efeb48) with Valgrind, we see use-after-free errors:
The script does not crash on Ruby master, but crashes on 3.0.2, 2.7.4, 2.6.8.