From 590c19c4e3f0437f0e5a140375b8ffe7b28e58c3 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 26 Feb 2018 20:36:12 -0500
Subject: [PATCH] ...

---
 coders/png.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/coders/png.c b/coders/png.c
index dd7b3648a..758e57672 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -5739,8 +5739,13 @@ static Image *ReadOneMNGImage(MngInfo* mng_info, const ImageInfo *image_info,
                     sizeof(*mng_info->global_plte));
 
                 if (mng_info->global_plte == (png_colorp) NULL)
-                  ThrowReaderException(ResourceLimitError,
-                    "MemoryAllocationFailed");
+                  {
+                    mng_info->global_plte_length=0;
+                    chunk=(unsigned char *) RelinquishMagickMemory(chunk);
+                    mng_info=MngInfoFreeStruct(mng_info);
+                    ThrowReaderException(ResourceLimitError,
+                      "MemoryAllocationFailed");
+                  }
 
                 for (i=0; i < (ssize_t) (length/3); i++)
                 {
-- 
2.40.0