Paper/patches/server/0337-Guard-against-serializing-mismatching-chunk-coordina.patch
2022-11-03 14:03:31 -07:00

58 lines
3.6 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Fri, 27 Dec 2019 09:42:26 -0800
Subject: [PATCH] Guard against serializing mismatching chunk coordinate
Should help if something dumb happens
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
index e59910540458ca912efea64d9f7cd212d63d110a..f4bf0ecde863f1795d764d8cc8d6525af02356ea 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
@@ -92,6 +92,18 @@ public class ChunkSerializer {
public ChunkSerializer() {}
+ // Paper start - guard against serializing mismatching coordinates
+ // TODO Note: This needs to be re-checked each update
+ public static ChunkPos getChunkCoordinate(CompoundTag chunkData) {
+ final int dataVersion = ChunkStorage.getVersion(chunkData);
+ if (dataVersion < 2842) { // Level tag is removed after this version
+ final CompoundTag levelData = chunkData.getCompound("Level");
+ return new ChunkPos(levelData.getInt("xPos"), levelData.getInt("zPos"));
+ } else {
+ return new ChunkPos(chunkData.getInt("xPos"), chunkData.getInt("zPos"));
+ }
+ }
+ // Paper end
// Paper start
public static final class InProgressChunkHolder {
@@ -117,7 +129,7 @@ public class ChunkSerializer {
public static InProgressChunkHolder loadChunk(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt, boolean distinguish) {
java.util.ArrayDeque<Runnable> tasksToExecuteOnMain = new java.util.ArrayDeque<>();
// Paper end
- ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos"));
+ ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos")); // Paper - diff on change, see ChunkSerializer#getChunkCoordinate
if (!Objects.equals(chunkPos, chunkcoordintpair1)) {
ChunkSerializer.LOGGER.error("Chunk file at {} is in the wrong location; relocating. (Expected {}, got {})", new Object[]{chunkPos, chunkPos, chunkcoordintpair1});
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
index f2539f2aab4086bc6772db9985ca9f75ff6a7c71..aa915195d4aab3e931a92bf844f6dc18a0a59b9e 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
@@ -178,6 +178,13 @@ public class ChunkStorage implements AutoCloseable {
// Paper start - async chunk io
public void write(ChunkPos chunkPos, CompoundTag nbt) throws IOException {
+ // Paper start
+ if (!chunkPos.equals(ChunkSerializer.getChunkCoordinate(nbt))) {
+ String world = (this instanceof net.minecraft.server.level.ChunkMap) ? ((net.minecraft.server.level.ChunkMap)this).level.getWorld().getName() : null;
+ throw new IllegalArgumentException("Chunk coordinate and serialized data do not have matching coordinates, trying to serialize coordinate " + chunkPos.toString()
+ + " but compound says coordinate is " + ChunkSerializer.getChunkCoordinate(nbt).toString() + (world == null ? " for an unknown world" : (" for world: " + world)));
+ }
+ // Paper end
this.regionFileCache.write(chunkPos, nbt);
// Paper end - Async chunk loading
if (this.legacyStructureHandler != null) {