From 9372f8fb339838677e5af5ad3a65d686dff82986 Mon Sep 17 00:00:00 2001
From: Charis Zhao <eryeer@163.com>
Date: Thu, 26 Dec 2019 16:46:02 +0800
Subject: [PATCH] add data size check (#1381)

---
 src/neo/IO/Helper.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/neo/IO/Helper.cs b/src/neo/IO/Helper.cs
index df74602cdd..531ce4827d 100644
--- a/src/neo/IO/Helper.cs
+++ b/src/neo/IO/Helper.cs
@@ -79,7 +79,8 @@ public static byte[] CompressLz4(this byte[] data)
 
         public static byte[] DecompressLz4(this byte[] data, int maxOutput)
         {
-            maxOutput = Math.Min(maxOutput, data.Length * 255);
+            var maxDecompressDataLength = data.Length * 255;
+            if (maxDecompressDataLength > 0) maxOutput = Math.Min(maxOutput, maxDecompressDataLength);
             using var buffer = MemoryPool<byte>.Shared.Rent(maxOutput);
             int length = LZ4Codec.Decode(data, buffer.Memory.Span);
             if (length < 0 || length > maxOutput) throw new FormatException();