From: cristy <urban-warrior@git.imagemagick.org>
Date: Tue, 28 Oct 2014 13:12:17 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~1824
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=efbf04c69131b35dcec7f5d37144e2b06275c29c;p=imagemagick

---

diff --git a/coders/pnm.c b/coders/pnm.c
index ce0e55968..35b40efc6 100644
--- a/coders/pnm.c
+++ b/coders/pnm.c
@@ -410,7 +410,7 @@ static Image *ReadPNMImage(const ImageInfo *image_info,ExceptionInfo *exception)
       }
     if ((image->columns == 0) || (image->rows == 0))
       ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
-    if (max_value > 4294967295)
+    if ((max_value == 0) || (max_value > 4294967295))
       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
     for (depth=1; GetQuantumRange(depth) < max_value; depth++) ;
     image->depth=depth;