Updated Upstream (Leaf)

patches/server/0039-Paper-Add-another-slot-sanity-check.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Dreeam <61569423+Dreeam-qwq@users.noreply.github.com>
+Date: Sat, 11 Nov 2023 03:50:55 -0500
+Subject: [PATCH] Paper: Add another slot sanity check
+
+Original code by PaperMC, licensed under GPL v3
+You can find the original code on https://github.com/PaperMC/Paper/commit/8493340be4fa69fa9369719272e5dff1b7a2f455
+
+This patch fixed a packet exploit that affects 1.20.1/2
+
+diff --git a/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java b/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
+index 38d47fbcd49cc291040ea00470abeb982fe2714c..662f3eee6ff17e0b0191b1c59066465db818ed2b 100644
+--- a/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
++++ b/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
+@@ -600,7 +600,7 @@ public abstract class AbstractContainerMenu {
+                 int j2;
+
+                 if (actionType == ClickType.SWAP) {
+-                    if (slotIndex < 0) return; // Paper
++                    if (slotIndex < 0 || button < 0) return; // Paper
+                     slot2 = (Slot) this.slots.get(slotIndex);
+                     itemstack1 = playerinventory.getItem(button);
+                     itemstack = slot2.getItem();