Bug 66425: Avoid a ClassCastException found via oss-fuzz

We try to avoid throwing ClassCastException, but it was possible
to trigger one here with a specially crafted input-file

Should fix https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=61330

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1911586 13f79535-47bb-0310-9956-ffa450edef68

poi-scratchpad/src/main/java/org/apache/poi/hsmf/datatypes/AttachmentChunks.java

@@ -181,6 +181,8 @@ public class AttachmentChunks implements ChunkGroup {
         // - ATTACH_LONG_PATHNAME
         // - ATTACH_SIZE
         final int chunkId = chunk.getChunkId();
+
+        try {
             if (chunkId == ATTACH_DATA.id) {
                 if (chunk instanceof ByteChunk) {
                     attachData = (ByteChunk) chunk;
@@ -207,6 +209,10 @@ public class AttachmentChunks implements ChunkGroup {
 
             // And add to the main list
             allChunks.add(chunk);
+        } catch (ClassCastException e) {
+            throw new IllegalArgumentException("ChunkId and type of chunk did not match, had id " +
+                    chunkId + " and type of chunk: " + chunk.getClass(), e);
+        }
     }
 
     /**