From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Luna <lunahatesgogle@gmail.com>
Date: Tue, 4 Jul 2023 18:49:34 -0300
Subject: [PATCH] Fix packet-related lag exploits


diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index ca6b809f56cf4d28d5a6514c18322419c8184f30..6bbf1a5620a5ab52add56b9fcf9ce92288498dab 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -958,7 +958,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
             this.player.sendSystemMessage(Component.translatable("advMode.notEnabled"));
         } else if (!this.player.canUseGameMasterBlocks() && (!this.player.isCreative() || !this.player.getBukkitEntity().hasPermission("minecraft.commandblock"))) { // Paper - command block permission
             this.player.sendSystemMessage(Component.translatable("advMode.notAllowed"));
-        } else {
+        } else if (this.player.level.isLoadedAndInBounds(packet.getPos())) { // Scissors
             BaseCommandBlock commandblocklistenerabstract = null;
             CommandBlockEntity tileentitycommand = null;
             BlockPos blockposition = packet.getPos();
@@ -1122,7 +1122,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
     @Override
     public void handleSetStructureBlock(ServerboundSetStructureBlockPacket packet) {
         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel());
-        if (this.player.canUseGameMasterBlocks()) {
+        if (this.player.canUseGameMasterBlocks() && this.player.level.isLoadedAndInBounds(packet.getPos())) { // Scissors
             BlockPos blockposition = packet.getPos();
             BlockState iblockdata = this.player.level.getBlockState(blockposition);
             BlockEntity tileentity = this.player.level.getBlockEntity(blockposition);
@@ -1180,7 +1180,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
     @Override
     public void handleSetJigsawBlock(ServerboundSetJigsawBlockPacket packet) {
         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel());
-        if (this.player.canUseGameMasterBlocks()) {
+        if (this.player.canUseGameMasterBlocks() && this.player.level.isLoadedAndInBounds(packet.getPos())) { // Scissors
             BlockPos blockposition = packet.getPos();
             BlockState iblockdata = this.player.level.getBlockState(blockposition);
             BlockEntity tileentity = this.player.level.getBlockEntity(blockposition);
@@ -1203,7 +1203,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
     @Override
     public void handleJigsawGenerate(ServerboundJigsawGeneratePacket packet) {
         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel());
-        if (this.player.canUseGameMasterBlocks()) {
+        if (this.player.canUseGameMasterBlocks() && this.player.level.isLoadedAndInBounds(packet.getPos())) { // Scissors
             BlockPos blockposition = packet.getPos();
             BlockEntity tileentity = this.player.level.getBlockEntity(blockposition);