From ba274d5b98d1582bba47a1591c9e02b1ff421352 Mon Sep 17 00:00:00 2001
From: Lode <lvandeve@gmail.com>
Date: Tue, 18 Nov 2014 23:37:42 +0100
Subject: protect against invalid chunk lengths in some tools

---
 pngdetail.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'pngdetail.cpp')

diff --git a/pngdetail.cpp b/pngdetail.cpp
index b876f71..98f03d2 100644
--- a/pngdetail.cpp
+++ b/pngdetail.cpp
@@ -304,7 +304,12 @@ Show the filtertypes of each scanline in this PNG image.
 void displayFilterTypes(const std::vector<unsigned char>& buffer)
 {
   std::vector<std::vector<unsigned char> > types;
-  lodepng::getFilterTypesInterlaced(types, buffer);
+  unsigned error = lodepng::getFilterTypesInterlaced(types, buffer);
+  if(error)
+  {
+    std::cout << "Error getting filter types" << std::endl;
+    return;
+  }
 
   if(types.size() == 7)
   {
-- 
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