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40 lines
2.6 KiB
Diff
40 lines
2.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Zach Brown <1254957+zachbr@users.noreply.github.com>
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Date: Tue, 23 Jul 2019 20:44:47 -0500
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Subject: [PATCH] Do not let the server load chunks from newer versions
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If the server attempts to load a chunk generated by a newer version of
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the game, immediately stop the server to prevent data corruption.
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You can override this functionality at your own peril.
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/SerializableChunkData.java b/src/main/java/net/minecraft/world/level/chunk/storage/SerializableChunkData.java
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index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/SerializableChunkData.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/SerializableChunkData.java
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@@ -0,0 +0,0 @@ public record SerializableChunkData(Registry<Biome> biomeRegistry, ChunkPos chun
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}
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// Paper end - guard against serializing mismatching coordinates
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+ // Paper start - Do not let the server load chunks from newer versions
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+ private static final int CURRENT_DATA_VERSION = net.minecraft.SharedConstants.getCurrentVersion().getDataVersion().getVersion();
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+ private static final boolean JUST_CORRUPT_IT = Boolean.getBoolean("Paper.ignoreWorldDataVersion");
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+ // Paper end - Do not let the server load chunks from newer versions
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+
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@Nullable
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public static SerializableChunkData parse(LevelHeightAccessor world, RegistryAccess registryManager, CompoundTag nbt) {
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if (!nbt.contains("Status", 8)) {
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return null;
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} else {
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+ // Paper start - Do not let the server load chunks from newer versions
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+ if (nbt.contains("DataVersion", net.minecraft.nbt.Tag.TAG_ANY_NUMERIC)) {
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+ final int dataVersion = nbt.getInt("DataVersion");
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+ if (!JUST_CORRUPT_IT && dataVersion > CURRENT_DATA_VERSION) {
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+ new RuntimeException("Server attempted to load chunk saved with newer version of minecraft! " + dataVersion + " > " + CURRENT_DATA_VERSION).printStackTrace();
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+ System.exit(1);
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+ }
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+ }
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+ // Paper end - Do not let the server load chunks from newer versions
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ChunkPos chunkcoordintpair = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos")); // Paper - guard against serializing mismatching coordinates; diff on change, see ChunkSerializer#getChunkCoordinate
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long i = nbt.getLong("LastUpdate");
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long j = nbt.getLong("InhabitedTime");
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