geforkt von Mirrors/Paper
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.
42 Zeilen
2.5 KiB
Diff
42 Zeilen
2.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Sun, 10 Jul 2022 14:13:22 -0700
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Subject: [PATCH] Don't use level random in entity constructors
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Paper makes the entity random thread-safe
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and constructing an entity off the main thread
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should be supported. Some entities (for whatever
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reason) use the level's random in some places.
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diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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index 78acc580d66917e52d89632e3f0b7c1e979714d4..d0dac3dc89b9bb645a1d8498802fb8c6bff6a78e 100644
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--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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@@ -67,7 +67,12 @@ public class ItemEntity extends Entity implements TraceableEntity {
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}
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public ItemEntity(Level world, double x, double y, double z, ItemStack stack) {
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- this(world, x, y, z, stack, world.random.nextDouble() * 0.2D - 0.1D, 0.2D, world.random.nextDouble() * 0.2D - 0.1D);
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+ // Paper start - Don't use level random in entity constructors (to make them thread-safe)
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+ this(EntityType.ITEM, world);
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+ this.setPos(x, y, z);
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+ this.setDeltaMovement(this.random.nextDouble() * 0.2D - 0.1D, 0.2D, this.random.nextDouble() * 0.2D - 0.1D);
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+ this.setItem(stack);
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+ // Paper end - Don't use level random in entity constructors
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}
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public ItemEntity(Level world, double x, double y, double z, ItemStack stack, double velocityX, double velocityY, double velocityZ) {
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diff --git a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
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index 16f9d38687c0fdda18468b5bfb61b09b98254968..e712bd07ea2946167782473a536e0c72fab4bccd 100644
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--- a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
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+++ b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
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@@ -44,7 +44,7 @@ public class PrimedTnt extends Entity implements TraceableEntity {
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public PrimedTnt(Level world, double x, double y, double z, @Nullable LivingEntity igniter) {
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this(EntityType.TNT, world);
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this.setPos(x, y, z);
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- double d3 = world.random.nextDouble() * 6.2831854820251465D;
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+ double d3 = this.random.nextDouble() * 6.2831854820251465D; // Paper - Don't use level random in entity constructors
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this.setDeltaMovement(-Math.sin(d3) * 0.02D, 0.20000000298023224D, -Math.cos(d3) * 0.02D);
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this.setFuse(80);
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