Initialize zstream state - #141
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ioquatix merged 2 commits intoAug 13, 2026
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dereference garbage pointer. (ruby/zlib#141) ruby/zlib@ef86fba163
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Calling
Zlib.gzipwith an invalid compression level should raiseZlib::StreamError, consistently withZlib::DeflateandZlib::GzipWriter.On several Ruby/platform combinations, the failed
deflateInit2call leavesz_stream.stateuninitialized. The subsequent gzip cleanup can then pass that invalid pointer intodeflate, causing a segmentation fault.This initializes
z_stream.statetoZ_NULLand adds a regression test for the invalid-level path.The failure was originally observed here:
https://github.com/socketry/protocol-grpc/actions/runs/31685751610/job/94401275917?pr=7