Paper-Old/patches/server/0850-Fix-int-overflow-in-chunk-range-check.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <jahnke.nassim@gmail.com>
Date: Tue, 11 Jan 2022 19:31:46 +0100
Subject: [PATCH] Fix int overflow in chunk range check


diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 387b0e9b862621e7d0c1179f348e07c25f1ee9c0..2e6e86439173ebdb13b9cebd1e266e91335c1e2d 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -621,9 +621,11 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
     public static boolean isChunkInRange(int x1, int z1, int x2, int z2, int distance) {
         int j1 = Math.max(0, Math.abs(x1 - x2) - 1);
         int k1 = Math.max(0, Math.abs(z1 - z2) - 1);
-        int l1 = Math.max(0, Math.max(j1, k1) - 1);
-        int i2 = Math.min(j1, k1);
-        int j2 = i2 * i2 + l1 * l1;
+        // Paper start - fix integer overflow
+        long l1 = Math.max(0, Math.max(j1, k1) - 1);
+        long i2 = Math.min(j1, k1);
+        long j2 = i2 * i2 + l1 * l1;
+        // Paper end
         int k2 = distance - 1;
         int l2 = k2 * k2;