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Validate compression claim

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Shane Freeder
2026-04-13 13:39:57 +01:00
parent 339a4c1887
commit a6d97e28ad
1 changed files with 2 additions and 0 deletions
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2
proxy/src/main/java/com/velocitypowered/proxy/protocol/netty/MinecraftCompressDecoder.java
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@@ -97,6 +97,8 @@ public class MinecraftCompressDecoder extends MessageToMessageDecoder<ByteBuf> {
ByteBuf uncompressed = preferredBuffer(ctx.alloc(), compressor, claimedUncompressedSize);
try {
compressor.inflate(compatibleIn, uncompressed, claimedUncompressedSize);
checkFrame(uncompressed.writerIndex() == claimedUncompressedSize,
"Decompressed size %s does not match claimed uncompressed size %s", uncompressed.writerIndex(), claimedUncompressedSize);
out.add(uncompressed);
} catch (Exception e) {
uncompressed.release();