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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
75 lines
3.3 KiB
Diff
75 lines
3.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
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Date: Sun, 6 Mar 2022 11:09:09 -0500
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Subject: [PATCH] Prevent entity loading causing async lookups
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index 3d0f7310840742a5b16f0c0a7115dc0c90202919..45712b358e97b65396f63b34c09debc1d42fdbb9 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -727,6 +727,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
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public void baseTick() {
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this.level().getProfiler().push("entityBaseTick");
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+ if (firstTick && this instanceof net.minecraft.world.entity.NeutralMob neutralMob) neutralMob.tickInitialPersistentAnger(level); // Paper - Prevent entity loading causing async lookups
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this.feetBlockState = null;
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if (this.isPassenger() && this.getVehicle().isRemoved()) {
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this.stopRiding();
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diff --git a/src/main/java/net/minecraft/world/entity/NeutralMob.java b/src/main/java/net/minecraft/world/entity/NeutralMob.java
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index fa64c7baa7587f2cfe80b78ed83be011239618cf..47d5a0928f3c86d71f851738bfe7beedc98cfbb3 100644
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--- a/src/main/java/net/minecraft/world/entity/NeutralMob.java
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+++ b/src/main/java/net/minecraft/world/entity/NeutralMob.java
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@@ -42,18 +42,11 @@ public interface NeutralMob {
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UUID uuid = nbt.getUUID("AngryAt");
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this.setPersistentAngerTarget(uuid);
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- Entity entity = ((ServerLevel) world).getEntity(uuid);
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-
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- if (entity != null) {
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- if (entity instanceof Mob) {
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- this.setLastHurtByMob((Mob) entity);
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- }
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-
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- if (entity.getType() == EntityType.PLAYER) {
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- this.setLastHurtByPlayer((Player) entity);
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- }
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-
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- }
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+ // Paper - Prevent entity loading causing async lookups; Moved diff to separate method
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+ // If this entity already survived its first tick, e.g. is loaded and ticked in sync, actively
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+ // tick the initial persistent anger.
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+ // If not, let the first tick on the baseTick call the method later down the line.
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+ if (this instanceof Entity entity && !entity.firstTick) this.tickInitialPersistentAnger(world);
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}
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}
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}
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@@ -127,4 +120,27 @@ public interface NeutralMob {
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@Nullable
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LivingEntity getTarget();
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+
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+ // Paper start - Prevent entity loading causing async lookups
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+ // Update last hurt when ticking
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+ default void tickInitialPersistentAnger(Level level) {
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+ UUID target = getPersistentAngerTarget();
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+ if (target == null) {
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+ return;
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+ }
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+
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+ Entity entity = ((ServerLevel) level).getEntity(target);
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+
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+ if (entity != null) {
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+ if (entity instanceof Mob) {
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+ this.setLastHurtByMob((Mob) entity);
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+ }
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+
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+ if (entity.getType() == EntityType.PLAYER) {
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+ this.setLastHurtByPlayer((Player) entity);
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+ }
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+
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+ }
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+ }
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+ // Paper end - Prevent entity loading causing async lookups
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}
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