From b5d715343a24be61be13a1546908ff9dbd3a743c Mon Sep 17 00:00:00 2001
From: Trustin Lee <trustin@gmail.com>
Date: Wed, 30 May 2012 15:51:24 -0700
Subject: [PATCH] Fail if DynamicChannelBuffer attempts to exceed the max
 capacity (#258)

- Contributed by @normanmaurer
---
 .../main/java/io/netty/buffer/DynamicChannelBuffer.java    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/buffer/src/main/java/io/netty/buffer/DynamicChannelBuffer.java b/buffer/src/main/java/io/netty/buffer/DynamicChannelBuffer.java
index 2ea089c46b..991c6d67c8 100644
--- a/buffer/src/main/java/io/netty/buffer/DynamicChannelBuffer.java
+++ b/buffer/src/main/java/io/netty/buffer/DynamicChannelBuffer.java
@@ -73,6 +73,13 @@ public class DynamicChannelBuffer extends AbstractChannelBuffer {
         int minNewCapacity = writerIndex() + minWritableBytes;
         while (newCapacity < minNewCapacity) {
             newCapacity <<= 1;
+            // Check if we exceeded the maximum size of 2gb if this is the case then
+            // newCapacity == 0
+            //
+            // https://github.com/netty/netty/issues/258
+            if (newCapacity == 0) {
+                throw new IllegalStateException("buffer capacity over 2GiB");
+            }
         }
 
         ChannelBuffer newBuffer = factory().getBuffer(order(), newCapacity);