https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=935

diff --git a/coders/dcm.c b/coders/dcm.c
index 9caf75e73f901b30c442d0fe0932257e27014830..d44cf80d0a715b72c6c3f1220bc66be556cc53b2 100644 (file)
--- a/coders/dcm.c
+++ b/coders/dcm.c
@@ -4274,6 +4274,8 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
     greenmap=(int *) RelinquishMagickMemory(greenmap);
   if (redmap != (int *) NULL)
     redmap=(int *) RelinquishMagickMemory(redmap);
+  if (image == (Image *) NULL)
+    return(image);
   (void) CloseBlob(image);
   if (status == MagickFalse)
     return(DestroyImageList(image));