https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9314

diff --git a/coders/dcm.c b/coders/dcm.c
index 817b922b9919387e519a1f98c54ee91cb6f359c2..9caf75e73f901b30c442d0fe0932257e27014830 100644 (file)
--- a/coders/dcm.c
+++ b/coders/dcm.c
@@ -3973,6 +3973,9 @@ 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)