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 1f7dc235f8cf848d740ef6a8cf879d253b56c1c8..2ef6fd0fadaf6b912c4f242210c1ce2756ccddd7 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -859,7 +859,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
             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();
@@ -1026,7 +1026,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
     @Override
     public void handleSetStructureBlock(ServerboundSetStructureBlockPacket packet) {
         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
-        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);
@@ -1084,7 +1084,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
     @Override
     public void handleSetJigsawBlock(ServerboundSetJigsawBlockPacket packet) {
         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
-        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);
@@ -1109,7 +1109,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
     @Override
     public void handleJigsawGenerate(ServerboundJigsawGeneratePacket packet) {
         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
-        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);