IllegalStack
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Published
20 hours ago •
dniym
dniym
Book Crasher Abusing IllegalStack
Basically using a book to abuse the meta checks with illegal stack:
[19:26:57] [Paper Watchdog Thread/ERROR]: --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH - xxx (MC: 1.16.1) ---
[19:26:57] [Paper Watchdog Thread/ERROR]: The server has not responded for 25 seconds! Creating thread dump
[19:26:57] [Paper Watchdog Thread/ERROR]: ------------------------------
[19:26:57] [Paper Watchdog Thread/ERROR]: Server thread dump (Look for plugins here before reporting to Paper!):
[19:26:57] [Paper Watchdog Thread/ERROR]: Handling packet for player xxx
[19:26:57] [Paper Watchdog Thread/ERROR]: Position: xxx
[19:26:57] [Paper Watchdog Thread/ERROR]: Total packets processed on the main thread for all players: 23592957
[19:26:57] [Paper Watchdog Thread/ERROR]: ------------------------------
[19:26:57] [Paper Watchdog Thread/ERROR]: Current Thread: Server thread
[19:26:57] [Paper Watchdog Thread/ERROR]: PID: 43 | Suspended: false | Native: false | State: RUNNABLE
[19:26:57] [Paper Watchdog Thread/ERROR]: Stack:
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$BmpCharPredicate.lambda$union$2(Pattern.java:5700)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$BmpCharPredicate$$Lambda$30/0x00000008000c6840.is(Unknown Source)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3963)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$Curly.match0(Pattern.java:4405)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$Curly.match(Pattern.java:4379)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$GroupHead.match(Pattern.java:4804)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$Branch.match(Pattern.java:4747)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$GroupHead.match(Pattern.java:4804)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$Branch.match(Pattern.java:4749)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Pattern$Start.match(Pattern.java:3619)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Matcher.search(Matcher.java:1729)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.util.regex.Matcher.find(Matcher.java:746)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.craftbukkit.v1_16_R1.util.CraftChatMessage$StringMessage.<init>(CraftChatMessage.java:71)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.craftbukkit.v1_16_R1.util.CraftChatMessage.fromString(CraftChatMessage.java:192)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.craftbukkit.v1_16_R1.inventory.CraftMetaBook.addPage(CraftMetaBook.java:265)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.craftbukkit.v1_16_R1.inventory.CraftMetaBook.<init>(CraftMetaBook.java:94)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.craftbukkit.v1_16_R1.inventory.CraftMetaBook.<init>(CraftMetaBook.java:58)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.craftbukkit.v1_16_R1.inventory.CraftItemStack.getItemMeta(CraftItemStack.java:286)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.craftbukkit.v1_16_R1.inventory.CraftItemStack.getItemMeta(CraftItemStack.java:275)
[19:26:57] [Paper Watchdog Thread/ERROR]: me.dniym.listeners.fListener.onInventoryPickup(fListener.java:2316)
[19:26:57] [Paper Watchdog Thread/ERROR]: com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor208.execute(Unknown Source)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.plugin.EventExecutor$$Lambda$3391/0x0000000800ca8c40.execute(Unknown Source)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.PlayerConnection.a(PlayerConnection.java:2607)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.PacketPlayInSetCreativeSlot.a(SourceFile:23)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.PacketPlayInSetCreativeSlot.a(SourceFile:9)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:43)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.PlayerConnectionUtils$$Lambda$6735/0x000000080233ac40.run(Unknown Source)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.TickTask.run(SourceFile:18)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.MinecraftServer.aZ(MinecraftServer.java:1193)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.MinecraftServer.executeNext(MinecraftServer.java:1186)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeAll(IAsyncTaskHandler.java:95)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.MinecraftServer.a(MinecraftServer.java:1317)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.MinecraftServer.v(MinecraftServer.java:1002)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.MinecraftServer.lambda$a$0(MinecraftServer.java:179)
[19:26:57] [Paper Watchdog Thread/ERROR]: app//net.minecraft.server.v1_16_R1.MinecraftServer$$Lambda$2999/0x0000000800908c40.run(Unknown Source)
[19:26:57] [Paper Watchdog Thread/ERROR]: [email protected]/java.lang.Thread.run(Thread.java:834)
[19:26:57] [Paper Watchdog Thread/ERROR]: ------------------------------
[19:26:57] [Paper Watchdog Thread/ERROR]: --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
[19:26:57] [Paper Watchdog Thread/ERROR]: ------------------------------
Hmmmm i just checked the source code, and you're running a different version than the current version as the line numbers don't line up.
I suspect it may be the author field but can you try on the latest version of IllegalStack? https://www.spigotmc.org/resources/dupe-fixes-illegal-stack-remover.44411/
Hmmmm i just checked the source code, and you're running a different version than the current version as the line numbers don't line up.
I suspect it may be the author field but can you try on the latest version of IllegalStack? https://www.spigotmc.org/resources/dupe-fixes-illegal-stack-remover.44411/
Just checked the source, it’s linking to the same method just a bit further down. The is.getItemMeta is triggering it. The issue is deeper I think with just an illegal item. I can’t reproduce since I don’t have a hacked client to trigger such a thing. It was a crashing book which utilized the instant getMeta from the item set slot method. I’m not sure if it’s in the scope of IllegalStack.
IllegalStack version 2.8 is now out, if you are still experiencing this issue please open a new ticket.