From: Cristy <urban-warrior@imagemagick.org>
Date: Tue, 3 Apr 2018 23:43:15 +0000 (-0400)
Subject: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7319
X-Git-Tag: 7.0.7-29~198
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4588138229f0bcdd77b2e37157039de0082a70c1;p=imagemagick

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7319
---

diff --git a/coders/mat.c b/coders/mat.c
index 3d797306e..8cadc50f0 100644
--- a/coders/mat.c
+++ b/coders/mat.c
@@ -537,6 +537,8 @@ ssize_t TotalSize = 0;
   while(*Size>0 && !EOFBlob(orig))
   {
     magick_size = ReadBlob(orig, (*Size < 16384) ? *Size : 16384, (unsigned char *) cache_block);
+    if (magick_size == 0)
+      break;
     zip_info.next_in = (Bytef *) cache_block;
     zip_info.avail_in = (uInt) magick_size;