Paper/patches/server/0535-Fix-for-large-move-vectors-crashing-server.patch
Jason 4dd33cb8b6
[ci skip] Drop "Fix CME on adding a passenger in CreatureSpawnEvent" (#6384)
This is no longer needed as Entity#passengers is an ImmutableList as of 1.17
2021-08-14 03:01:07 -07:00

66 lines
4.5 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <spottedleaf@spottedleaf.dev>
Date: Sun, 17 May 2020 23:47:33 -0700
Subject: [PATCH] Fix for large move vectors crashing server
Check movement distance also based on current position.
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index a6a14c6d3eb6d77997e1763e2dd451e0718511ea..2ec517663ede99f76172376f6a37ce13c6260127 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -506,19 +506,24 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
if (entity != this.player && entity.getControllingPassenger() == this.player && entity == this.lastVehicle) {
ServerLevel worldserver = this.player.getLevel();
- double d0 = entity.getX();
- double d1 = entity.getY();
- double d2 = entity.getZ();
- double d3 = ServerGamePacketListenerImpl.clampHorizontal(packet.getX());
- double d4 = ServerGamePacketListenerImpl.clampVertical(packet.getY());
- double d5 = ServerGamePacketListenerImpl.clampHorizontal(packet.getZ());
+ double d0 = entity.getX();final double fromX = d0; // Paper - OBFHELPER
+ double d1 = entity.getY();final double fromY = d1; // Paper - OBFHELPER
+ double d2 = entity.getZ();final double fromZ = d2; // Paper - OBFHELPER
+ double d3 = ServerGamePacketListenerImpl.clampHorizontal(packet.getX());final double toX = d3; // Paper - OBFHELPER
+ double d4 = ServerGamePacketListenerImpl.clampVertical(packet.getY());final double toY = d4; // Paper - OBFHELPER
+ double d5 = ServerGamePacketListenerImpl.clampHorizontal(packet.getZ());final double toZ = d5; // Paper - OBFHELPER
float f = Mth.wrapDegrees(packet.getYRot());
float f1 = Mth.wrapDegrees(packet.getXRot());
double d6 = d3 - this.vehicleFirstGoodX;
double d7 = d4 - this.vehicleFirstGoodY;
double d8 = d5 - this.vehicleFirstGoodZ;
double d9 = entity.getDeltaMovement().lengthSqr();
- double d10 = d6 * d6 + d7 * d7 + d8 * d8;
+ // Paper start - fix large move vectors killing the server
+ double currDeltaX = toX - fromX;
+ double currDeltaY = toY - fromY;
+ double currDeltaZ = toZ - fromZ;
+ double d10 = Math.max(d6 * d6 + d7 * d7 + d8 * d8, (currDeltaX * currDeltaX + currDeltaY * currDeltaY + currDeltaZ * currDeltaZ) - 1);
+ // Paper end - fix large move vectors killing the server
// CraftBukkit start - handle custom speeds and skipped ticks
@@ -1232,14 +1237,19 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
float prevPitch = this.player.getXRot();
// CraftBukkit end
double d3 = this.player.getX(); final double toX = d3; // Paper - OBFHELPER
- double d4 = this.player.getY();
+ double d4 = this.player.getY(); final double toY = d4; // Paper - OBFHELPER
double d5 = this.player.getZ(); final double toZ = d5; // Paper - OBFHELPER
double d6 = this.player.getY();
double d7 = d0 - this.firstGoodX;
double d8 = d1 - this.firstGoodY;
double d9 = d2 - this.firstGoodZ;
double d10 = this.player.getDeltaMovement().lengthSqr();
- double d11 = d7 * d7 + d8 * d8 + d9 * d9;
+ // Paper start - fix large move vectors killing the server
+ double currDeltaX = toX - prevX;
+ double currDeltaY = toY - prevY;
+ double currDeltaZ = toZ - prevZ;
+ double d11 = Math.max(d7 * d7 + d8 * d8 + d9 * d9, (currDeltaX * currDeltaX + currDeltaY * currDeltaY + currDeltaZ * currDeltaZ) - 1);
+ // Paper end - fix large move vectors killing the server
if (this.player.isSleeping()) {
if (d11 > 1.0D) {