Paper/patches/server/0343-Guard-against-serializing-mismatching-chunk-coordina.patch
Spottedleaf 41647af74c Do not use worldgen executor for api profile completions
We cannot put blocking network I/O onto the worldgen threads,
this will crash the server if it stalls
2022-07-03 14:55:56 -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 8480310bd389ad55b8138a20da59cbcffb973819..864e591b10360b0f12fe5c5a650da372555ebd10 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
@@ -84,6 +84,18 @@ 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 {
@@ -109,7 +121,7 @@ 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 694778b5c23dbe9c8603c3483476b5252aa079bc..315be30daf0be84efbb4d634dc01e1bf9e6e696e 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) {