1 files changed, 43 insertions, 0 deletions
diff --git a/patches/server/1015-Add-slot-sanity-checks-in-container-clicks.patch b/patches/server/1015-Add-slot-sanity-checks-in-container-clicks.patch
new file mode 100644
index 0000000000..c9eb55f978
--- /dev/null
+++ b/patches/server/1015-Add-slot-sanity-checks-in-container-clicks.patch
@@ -0,0 +1,43 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <[email protected]>
+Date: Mon, 11 Sep 2023 12:01:57 +1000
+Subject: [PATCH] Add slot sanity checks in container clicks
+
+
+diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+index 8bca5ba75977c0a61197eb47c94f0456d66b29a4..33be0db006cca66f38f2105924466b0210139848 100644
+--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
++++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+@@ -2980,6 +2980,12 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
+                             break;
+                         case SWAP:
+                             if ((packet.getButtonNum() >= 0 && packet.getButtonNum() < 9) || packet.getButtonNum() == 40) {
++                                // Paper start
++                                if (packet.getSlotNum() < 0) {
++                                    action = InventoryAction.NOTHING;
++                                    break;
++                                }
++                                // Paper end
+                                 click = (packet.getButtonNum() == 40) ? ClickType.SWAP_OFFHAND : ClickType.NUMBER_KEY;
+                                 Slot clickedSlot = this.player.containerMenu.getSlot(packet.getSlotNum());
+                                 if (clickedSlot.mayPickup(this.player)) {
+diff --git a/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java b/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
+index 3ef712299fe248602b0b117c0a8e285cdf4e05c2..5d298b11f74cd2da47e6613ced621ab62aa73a7b 100644
+--- a/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
++++ b/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
+@@ -423,6 +423,7 @@ public abstract class AbstractContainerMenu {
+                     this.resetQuickCraft();
+                 }
+             } else if (this.quickcraftStatus == 1) {
++                if (slotIndex < 0) return; // Paper
+                 slot = (Slot) this.slots.get(slotIndex);
+                 itemstack = this.getCarried();
+                 if (AbstractContainerMenu.canItemQuickReplace(slot, itemstack, true) && slot.mayPlace(itemstack) && (this.quickcraftType == 2 || itemstack.getCount() > this.quickcraftSlots.size()) && this.canDragTo(slot)) {
+@@ -598,6 +599,7 @@ public abstract class AbstractContainerMenu {
+                 int j2;
+ 
+                 if (actionType == ClickType.SWAP) {
++                    if (slotIndex < 0 || button < 0) return; // Paper
+                     slot2 = (Slot) this.slots.get(slotIndex);
+                     itemstack1 = playerinventory.getItem(button);
+                     itemstack = slot2.getItem();