From: Cristy <urban-warrior@imagemagick.org>
Date: Tue, 10 Apr 2018 00:58:52 +0000 (-0400)
Subject: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7504
X-Git-Tag: 7.0.7-29~147
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=66ab1b999f144edd68b9e6467132bfe18903dddc;p=imagemagick

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7504
---

diff --git a/coders/png.c b/coders/png.c
index f9be58a46..d4bab3a26 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -4534,6 +4534,8 @@ static Image *ReadOneJNGImage(MngInfo *mng_info,
             break;
           chunk[i]=(unsigned char) c;
         }
+        for ( ; i < (ssize_t) length; i++)
+          chunk[i]='\0';
 
         p=chunk;
       }