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Paper/patches/server/0841-Guard-against-invalid-entity-positions.patch

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Add per player chunk loading limits Configurable under "settings.chunk-loading.player-max-chunk-load-rate", defaults to -1. This commit also changes the chunk loading to be distributed equally for all players, rather than distance based. This is to ensure players flying around do not take priority over everyone else. The exception to this new rule is the min-load-radius, which still has priority over everything else.
2022-03-31 15:04:23 +02:00
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Thu, 31 Mar 2022 05:18:28 -0700
Subject: [PATCH] Guard against invalid entity positions
Anything not finite should be blocked and logged
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
Fix configs that relied on outdated min/max y levels (#6986)
2022-10-09 08:52:09 +02:00
index 869c38119d030c849cff2b66b3fd26f143933782..445eebd06c2eb681c334bdf07c9fd6517705b128 100644
Add per player chunk loading limits Configurable under "settings.chunk-loading.player-max-chunk-load-rate", defaults to -1. This commit also changes the chunk loading to be distributed equally for all players, rather than distance based. This is to ensure players flying around do not take priority over everyone else. The exception to this new rule is the min-load-radius, which still has priority over everything else.
2022-03-31 15:04:23 +02:00
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
Fix configs that relied on outdated min/max y levels (#6986)
2022-10-09 08:52:09 +02:00
@@ -4198,11 +4198,33 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
Add per player chunk loading limits Configurable under "settings.chunk-loading.player-max-chunk-load-rate", defaults to -1. This commit also changes the chunk loading to be distributed equally for all players, rather than distance based. This is to ensure players flying around do not take priority over everyone else. The exception to this new rule is the min-load-radius, which still has priority over everything else.
2022-03-31 15:04:23 +02:00
return this.getZ((2.0D * this.random.nextDouble() - 1.0D) * widthScale);
}
+ // Paper start - block invalid positions
+ public static boolean checkPosition(Entity entity, double newX, double newY, double newZ) {
+ if (Double.isFinite(newX) && Double.isFinite(newY) && Double.isFinite(newZ)) {
+ return true;
+ }
+
+ String entityInfo = null;
+ try {
+ entityInfo = entity.toString();
+ } catch (Exception ex) {
+ entityInfo = "[Entity info unavailable] ";
+ }
+ LOGGER.error("New entity position is invalid! Tried to set invalid position (" + newX + "," + newY + "," + newZ + ") for entity " + entity.getClass().getName() + " located at " + entity.position + ", entity info: " + entityInfo, new Throwable());
+ return false;
+ }
+ // Paper end - block invalid positions
+
public final void setPosRaw(double x, double y, double z) {
// Paper start
this.setPosRaw(x, y, z, false);
}
public final void setPosRaw(double x, double y, double z, boolean forceBoundingBoxUpdate) {
+ // Paper start - block invalid positions
+ if (!checkPosition(this, x, y, z)) {
+ return;
+ }
+ // Paper end - block invalid positions
// Paper end
Rewrite chunk system (#8177) Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 10:02:51 +02:00
// Paper start - rewrite chunk system
if (this.updatingSectionStatus) {
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