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Paper/patches/server/1004-Do-not-read-tile-entities-in-chunks-that-are-positio.patch
2024-01-06 15:07:59 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sun, 18 Jun 2023 23:04:46 -0700
Subject: [PATCH] Do not read tile entities in chunks that are positioned
outside of the chunk
The tile entities are not accessible and so should not be loaded.
This can happen as a result of users moving regionfiles around,
which would cause a crash on Folia but would appear to function
fine on Paper.
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 df9ae808c5a59ea25145c9df62f42fb33d159021..daa7525074facfbf31c1183e872f083a02697700 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
@@ -381,6 +381,13 @@ public class ChunkSerializer {
for (int k1 = 0; k1 < nbttaglist3.size(); ++k1) {
CompoundTag nbttagcompound4 = nbttaglist3.getCompound(k1);
+ // Paper start - do not read tile entities positioned outside the chunk
+ BlockPos blockposition = BlockEntity.getPosFromTag(nbttagcompound4);
+ if ((blockposition.getX() >> 4) != chunkPos.x || (blockposition.getZ() >> 4) != chunkPos.z) {
+ LOGGER.warn("Tile entity serialized in chunk " + chunkPos + " in world '" + world.getWorld().getName() + "' positioned at " + blockposition + " is located outside of the chunk");
+ continue;
+ }
+ // Paper end - do not read tile entities positioned outside the chunk
((ChunkAccess) object1).setBlockEntityNbt(nbttagcompound4);
}
@@ -679,10 +686,19 @@ public class ChunkSerializer {
CompoundTag nbttagcompound1 = nbttaglist1.getCompound(i);
boolean flag = nbttagcompound1.getBoolean("keepPacked");
+ // Paper start - do not read tile entities positioned outside the chunk
+ BlockPos blockposition = BlockEntity.getPosFromTag(nbttagcompound1); // moved up
+ ChunkPos chunkPos = chunk.getPos();
+ if ((blockposition.getX() >> 4) != chunkPos.x || (blockposition.getZ() >> 4) != chunkPos.z) {
+ LOGGER.warn("Tile entity serialized in chunk " + chunkPos + " in world '" + world.getWorld().getName() + "' positioned at " + blockposition + " is located outside of the chunk");
+ continue;
+ }
+ // Paper end - do not read tile entities positioned outside the chunk
+
if (flag) {
chunk.setBlockEntityNbt(nbttagcompound1);
} else {
- BlockPos blockposition = BlockEntity.getPosFromTag(nbttagcompound1);
+ // Paper - do not read tile entities positioned outside the chunk - move up
BlockEntity tileentity = BlockEntity.loadStatic(blockposition, chunk.getBlockState(blockposition), nbttagcompound1);
if (tileentity != null) {