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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.
42 lines
2.1 KiB
Diff
42 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Sat, 19 Mar 2022 12:12:22 +0000
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Subject: [PATCH] Buffer OOB setBlock calls
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lets debug mode throw a trace in order to potentially see where
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such calls are cascading from easier, but, generally, if you see one setBlock
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call, you're gonna see more, and this just potentially causes a flood of logs
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which can cause issues for slower terminals, etc.
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We can limit the flood by just allowing one for a single gen region,
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we'll also only gen a trace for the first one, I see no real pressing need
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to generate more, given that that would *massively* negate this patch otherwise
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diff --git a/src/main/java/net/minecraft/server/level/WorldGenRegion.java b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
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index d11741d2618976bdb51f75d823f260f32d5bafc9..ff94af5be8de374f5cde2607eebbb23e65705581 100644
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--- a/src/main/java/net/minecraft/server/level/WorldGenRegion.java
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+++ b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
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@@ -275,6 +275,7 @@ public class WorldGenRegion implements WorldGenLevel {
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}
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}
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+ private boolean hasSetFarWarned = false; // Paper - Buffer OOB setBlock calls
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@Override
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public boolean ensureCanWrite(BlockPos pos) {
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int i = SectionPos.blockToSectionCoord(pos.getX());
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@@ -294,7 +295,15 @@ public class WorldGenRegion implements WorldGenLevel {
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return true;
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} else {
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+ // Paper start - Buffer OOB setBlock calls
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+ if (!hasSetFarWarned) {
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Util.logAndPauseIfInIde("Detected setBlock in a far chunk [" + i + ", " + j + "], pos: " + pos + ", status: " + this.generatingStatus + (this.currentlyGenerating == null ? "" : ", currently generating: " + (String) this.currentlyGenerating.get()));
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+ hasSetFarWarned = true;
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+ if (this.getServer() != null && this.getServer().isDebugging()) {
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+ io.papermc.paper.util.TraceUtil.dumpTraceForThread("far setBlock call");
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+ }
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+ }
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+ // Paper end - Buffer OOB setBlock calls
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return false;
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}
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}
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