Mirror von
https://github.com/PaperMC/Paper.git
synchronisiert 2024-12-16 11:30:06 +01:00
89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
97 Zeilen
5.4 KiB
Diff
97 Zeilen
5.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
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Date: Fri, 29 Jul 2022 12:35:19 -0400
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Subject: [PATCH] Warn on plugins accessing faraway chunks
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index 275c02d480cdf25ba0e735f4a43015ec0af238b3..2cbb3fcae6a8e26ee4bc2a9c88e64984da15ce86 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -345,7 +345,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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}
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private static boolean isInWorldBoundsHorizontal(BlockPos pos) {
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- return pos.getX() >= -30000000 && pos.getZ() >= -30000000 && pos.getX() < 30000000 && pos.getZ() < 30000000;
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+ return pos.getX() >= -30000000 && pos.getZ() >= -30000000 && pos.getX() < 30000000 && pos.getZ() < 30000000; // Diff on change warnUnsafeChunk()
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}
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private static boolean isOutsideSpawnableHeight(int y) {
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 97ebf2e2e08469cacc66c4f38bd2edfc2107fe6a..54cdb4b6a97250c1e15e2fce355e3699c9189948 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -318,9 +318,24 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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public boolean setSpawnLocation(int x, int y, int z) {
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return this.setSpawnLocation(x, y, z, 0.0F);
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}
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+ // Paper start
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+ private static void warnUnsafeChunk(String reason, int x, int z) {
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+ // if any chunk coord is outside of 30 million blocks
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+ if (x > 1875000 || z > 1875000 || x < -1875000 || z < -1875000) {
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+ Plugin plugin = io.papermc.paper.util.StackWalkerUtil.getFirstPluginCaller();
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+ if (plugin != null) {
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+ plugin.getLogger().warning("Plugin is %s at (%s, %s), this might cause issues.".formatted(reason, x, z));
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+ }
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+ if (net.minecraft.server.MinecraftServer.getServer().isDebugging()) {
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+ io.papermc.paper.util.TraceUtil.dumpTraceForThread("Dangerous chunk retrieval");
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+ }
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+ }
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+ }
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+ // Paper end
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@Override
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public Chunk getChunkAt(int x, int z) {
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+ warnUnsafeChunk("getting a faraway chunk", x, z); // Paper
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// Paper start - add ticket to hold chunk for a little while longer if plugin accesses it
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net.minecraft.world.level.chunk.LevelChunk chunk = this.world.getChunkSource().getChunkAtIfLoadedImmediately(x, z);
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if (chunk == null) {
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@@ -421,6 +436,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean regenerateChunk(int x, int z) {
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org.spigotmc.AsyncCatcher.catchOp("chunk regenerate"); // Spigot
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+ warnUnsafeChunk("regenerating a faraway chunk", x, z); // Paper
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// Paper start - implement regenerateChunk method
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final ServerLevel serverLevel = this.world;
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final net.minecraft.server.level.ServerChunkCache serverChunkCache = serverLevel.getChunkSource();
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@@ -515,6 +531,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean loadChunk(int x, int z, boolean generate) {
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org.spigotmc.AsyncCatcher.catchOp("chunk load"); // Spigot
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+ warnUnsafeChunk("loading a faraway chunk", x, z); // Paper
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ChunkAccess chunk = this.world.getChunkSource().getChunk(x, z, generate || isChunkGenerated(x, z) ? ChunkStatus.FULL : ChunkStatus.EMPTY, true); // Paper
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// If generate = false, but the chunk already exists, we will get this back.
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@@ -547,6 +564,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean addPluginChunkTicket(int x, int z, Plugin plugin) {
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+ warnUnsafeChunk("adding a faraway chunk ticket", x, z); // Paper
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Preconditions.checkArgument(plugin != null, "null plugin");
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Preconditions.checkArgument(plugin.isEnabled(), "plugin is not enabled");
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@@ -628,6 +646,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public void setChunkForceLoaded(int x, int z, boolean forced) {
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+ warnUnsafeChunk("forceloading a faraway chunk", x, z); // Paper
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this.getHandle().setChunkForced(x, z, forced);
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}
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@@ -947,6 +966,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public int getHighestBlockYAt(int x, int z, org.bukkit.HeightMap heightMap) {
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+ warnUnsafeChunk("getting a faraway chunk", x >> 4, z >> 4); // Paper
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// Transient load for this tick
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return this.world.getChunk(x >> 4, z >> 4).getHeight(CraftHeightMap.toNMS(heightMap), x, z);
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}
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@@ -2380,6 +2400,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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// Spigot end
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// Paper start
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public java.util.concurrent.CompletableFuture<Chunk> getChunkAtAsync(int x, int z, boolean gen, boolean urgent) {
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+ warnUnsafeChunk("getting a faraway chunk async", x, z); // Paper
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if (Bukkit.isPrimaryThread()) {
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net.minecraft.world.level.chunk.LevelChunk immediate = this.world.getChunkSource().getChunkAtIfLoadedImmediately(x, z);
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if (immediate != null) {
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