From: Dirk Lemstra <dirk@git.imagemagick.org>
Date: Tue, 10 Apr 2018 20:38:27 +0000 (+0200)
Subject: Throw exception instead of break (https://bugs.chromium.org/p/oss-fuzz/issues/detail... 
X-Git-Tag: 7.0.7-29~143
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f0aa22ee0d925181672b3c6ca0c5490d8b90a572;p=imagemagick

Throw exception instead of break (https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7515).
---

diff --git a/coders/png.c b/coders/png.c
index 457db712e..4d783615f 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -5437,7 +5437,11 @@ static Image *ReadOneMNGImage(MngInfo* mng_info, const ImageInfo *image_info,
 
               c=ReadBlobByte(image);
               if (c == EOF)
-                break;
+                {
+                  chunk=(unsigned char *) RelinquishMagickMemory(chunk);
+                  ThrowReaderException(CorruptImageError,
+                    "InsufficientImageDataInFile");
+                }
               chunk[i]=(unsigned char) c;
             }