PaperMC/patches/server/0506-Fix-for-large-move-vectors-crashing-server.patch
Nassim Jahnke ef0e5a642d
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
9ae3f10f SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API
48c0c547 PR-786: Add methods to get sounds from entities

CraftBukkit Changes:
5cc9c022a SPIGOT-7152: Handle hand item changing during air interact event
4ffa1acf6 SPIGOT-7154: Players get kicked when interacting with a conversation
4daa21123 SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API
e5d6a9bbf PR-1100: Add methods to get sounds from entities
b7e9f1c8b SPIGOT-7146: Reduce use of Material switch in ItemMeta

Spigot Changes:
4c157bb4 Rebuild patches
2022-09-12 13:31:45 +02:00

92 lines
6.3 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 214771e661ca3303af167fda3b623d83f0f63055..3d7d23a02e4aceb95ec36fbca9d02294f08c5780 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -575,9 +575,9 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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 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
@@ -587,8 +587,19 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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
+
+ // Paper start - fix large move vectors killing the server
+ double otherFieldX = d3 - this.vehicleLastGoodX;
+ double otherFieldY = d4 - this.vehicleLastGoodY - 1.0E-6D;
+ double otherFieldZ = d5 - this.vehicleLastGoodZ;
+ d10 = Math.max(d10, (otherFieldX * otherFieldX + otherFieldY * otherFieldY + otherFieldZ * otherFieldZ) - 1);
+ // Paper end - fix large move vectors killing the server
// CraftBukkit start - handle custom speeds and skipped ticks
this.allowedPlayerTicks += (System.currentTimeMillis() / 50) - this.lastTick;
@@ -634,9 +645,9 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
boolean flag = worldserver.noCollision(entity, entity.getBoundingBox().deflate(0.0625D));
- d6 = d3 - this.vehicleLastGoodX;
- d7 = d4 - this.vehicleLastGoodY - 1.0E-6D;
- d8 = d5 - this.vehicleLastGoodZ;
+ d6 = d3 - this.vehicleLastGoodX; // Paper - diff on change, used for checking large move vectors above
+ d7 = d4 - this.vehicleLastGoodY - 1.0E-6D; // Paper - diff on change, used for checking large move vectors above
+ d8 = d5 - this.vehicleLastGoodZ; // Paper - diff on change, used for checking large move vectors above
boolean flag1 = entity.verticalCollisionBelow;
entity.move(MoverType.PLAYER, new Vec3(d6, d7, d8));
@@ -1356,7 +1367,18 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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
+ // Paper start - fix large move vectors killing the server
+ double otherFieldX = d0 - this.lastGoodX;
+ double otherFieldY = d1 - this.lastGoodY;
+ double otherFieldZ = d2 - this.lastGoodZ;
+ d11 = Math.max(d11, (otherFieldX * otherFieldX + otherFieldY * otherFieldY + otherFieldZ * otherFieldZ) - 1);
+ // Paper end - fix large move vectors killing the server
if (this.player.isSleeping()) {
if (d11 > 1.0D) {
@@ -1408,9 +1430,9 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
AABB axisalignedbb = this.player.getBoundingBox();
- d7 = d0 - this.lastGoodX;
- d8 = d1 - this.lastGoodY;
- d9 = d2 - this.lastGoodZ;
+ d7 = d0 - this.lastGoodX; // Paper - diff on change, used for checking large move vectors above
+ d8 = d1 - this.lastGoodY; // Paper - diff on change, used for checking large move vectors above
+ d9 = d2 - this.lastGoodZ; // Paper - diff on change, used for checking large move vectors above
boolean flag = d8 > 0.0D;
if (this.player.isOnGround() && !packet.isOnGround() && flag) {