From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 10 Mar 2018 17:43:25 +0000 (-0500)
Subject: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6818
X-Git-Tag: 7.0.7-26~38
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=13720970982b239bc3334b3d845b8edff03570c7;p=imagemagick

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6818
---

diff --git a/coders/dcm.c b/coders/dcm.c
index 5c8646468..ebace2e68 100644
--- a/coders/dcm.c
+++ b/coders/dcm.c
@@ -3789,6 +3789,9 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
       stream_info->offset_count=length >> 2;
       if (stream_info->offset_count != 0)
         {
+         if (stream_info->offsets != (ssize_t *) NULL)
+            stream_info->offsets=(ssize_t *) RelinquishMagickMemory(
+              stream_info->offsets); 
           stream_info->offsets=(ssize_t *) AcquireQuantumMemory(
             stream_info->offset_count,sizeof(*stream_info->offsets));
           if (stream_info->offsets == (ssize_t *) NULL)