fix: check close error in oci/storage.go during ingestion (#830)

Fixes #829

---------

Signed-off-by: Lixia (Sylvia) Lei <lixlei@microsoft.com>

content/oci/storage.go

@@ -141,13 +141,16 @@ func (s *Storage) ingest(expected ocispec.Descriptor, content io.Reader) (path s
 
 	path = fp.Name()
 	defer func() {
-		// remove the temp file in case of error.
-		// this executes after the file is closed.
+		// close the temp file and check close error
+		if err := fp.Close(); err != nil && ingestErr == nil {
+			ingestErr = fmt.Errorf("failed to close ingest file: %w", err)
+		}
+
+		// remove the temp file in case of error
 		if ingestErr != nil {
 			os.Remove(path)
 		}
 	}()
-	defer fp.Close()
 
 	buf := bufPool.Get().(*[]byte)
 	defer bufPool.Put(buf)