iemejia commented on code in PR #3854:
URL: https://github.com/apache/avro/pull/3854#discussion_r3567621029
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lang/c++/impl/DataFile.cc:
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@@ -627,12 +679,30 @@ void DataFileReaderBase::readDataBlock() {
const uint8_t *data;
size_t len;
+ const size_t maxLength = maxDecompressLength();
Review Comment:
Fixed — the deflate path now clamps the working maxLength to
`std::numeric_limits<uLong>::max()`, so a larger AVRO_MAX_DECOMPRESS_LENGTH
can't cause the total_out-based buffer arithmetic to wrap where uLong is 32-bit.
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