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Fix chunk range int overflow
2022-01-11 18:34:25 +00:00
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
1.18 misc performance dev branch (#7368) - Port player chunk loader patch Makes the chunk system act as it did in 1.17, no additional tickets (and thus logic) to make a chunk ticking. Adds simulation distance API, deprecates old no-tick method. - More collision optimisations Ancient patch from tuinity that never could be pushed to master. - Fix Optimise ArraySetSorted#removeIf patch - Execute chunk tasks fairly for worlds while waiting for next tick - Port Replace ticket level propagator
2022-02-18 17:44:46 +00:00
index 79dbffe899dd7e31af648302c557e2993f170623..6a035b173cf0d288b2912f568078fede45d138f2 100644
Fix chunk range int overflow
2022-01-11 18:34:25 +00:00
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
1.18 misc performance dev branch (#7368) - Port player chunk loader patch Makes the chunk system act as it did in 1.17, no additional tickets (and thus logic) to make a chunk ticking. Adds simulation distance API, deprecates old no-tick method. - More collision optimisations Ancient patch from tuinity that never could be pushed to master. - Fix Optimise ArraySetSorted#removeIf patch - Execute chunk tasks fairly for worlds while waiting for next tick - Port Replace ticket level propagator
2022-02-18 17:44:46 +00:00
@@ -622,9 +622,11 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
Fix chunk range int overflow
2022-01-11 18:34:25 +00:00
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;