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64 lines
4.2 KiB
Diff
64 lines
4.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Fri, 27 Dec 2019 09:42:26 -0800
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Subject: [PATCH] Guard against serializing mismatching chunk coordinate
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Should help if something dumb happens
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
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index 329e7eb1c3e92445b3fae9e1e79d0497b7e3e3f2..909acbf5b8c6edcb4529647c11464d911d6f8c15 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
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@@ -172,8 +172,19 @@ public class ChunkStorage implements AutoCloseable {
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}
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public CompletableFuture<Void> write(ChunkPos chunkPos, Supplier<CompoundTag> nbtSupplier) {
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+ // Paper start - guard against possible chunk pos desync
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+ final Supplier<CompoundTag> guardedPosCheck = () -> {
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+ CompoundTag nbt = nbtSupplier.get();
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+ if (nbt != null && !chunkPos.equals(SerializableChunkData.getChunkCoordinate(nbt))) {
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+ final String world = (ChunkStorage.this instanceof net.minecraft.server.level.ChunkMap) ? ((net.minecraft.server.level.ChunkMap) ChunkStorage.this).level.getWorld().getName() : null;
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+ throw new IllegalArgumentException("Chunk coordinate and serialized data do not have matching coordinates, trying to serialize coordinate " + chunkPos
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+ + " but compound says coordinate is " + SerializableChunkData.getChunkCoordinate(nbt) + (world == null ? " for an unknown world" : (" for world: " + world)));
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+ }
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+ return nbt;
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+ };
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+ // Paper end - guard against possible chunk pos desync
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this.handleLegacyStructureIndex(chunkPos);
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- return this.worker.store(chunkPos, nbtSupplier);
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+ return this.worker.store(chunkPos, guardedPosCheck); // Paper - guard against possible chunk pos desync
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}
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protected void handleLegacyStructureIndex(ChunkPos chunkPos) {
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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 4367ccc628bb4f404d6a081083002518442f462b..92ad7704a77c024afe090488764eaf59a4f7505f 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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@@ -91,13 +91,25 @@ public record SerializableChunkData(Registry<Biome> biomeRegistry, ChunkPos chun
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public static final String SECTIONS_TAG = "sections";
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public static final String BLOCK_LIGHT_TAG = "BlockLight";
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public static final String SKY_LIGHT_TAG = "SkyLight";
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+ // Paper start - guard against serializing mismatching coordinates
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+ // TODO Note: This needs to be re-checked each update
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+ public static ChunkPos getChunkCoordinate(final CompoundTag chunkData) {
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+ final int dataVersion = ChunkStorage.getVersion(chunkData);
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+ if (dataVersion < 2842) { // Level tag is removed after this version
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+ final CompoundTag levelData = chunkData.getCompound("Level");
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+ return new ChunkPos(levelData.getInt("xPos"), levelData.getInt("zPos"));
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+ } else {
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+ return new ChunkPos(chunkData.getInt("xPos"), chunkData.getInt("zPos"));
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+ }
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+ }
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+ // Paper end - guard against serializing mismatching coordinates
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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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- ChunkPos chunkcoordintpair = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos"));
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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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ChunkStatus chunkstatus = ChunkStatus.byName(nbt.getString("Status"));
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