diff --git a/internal/util/validate.go b/internal/util/validate.go
index 0a21390e8..81404249b 100644
--- a/internal/util/validate.go
+++ b/internal/util/validate.go
@@ -78,3 +78,16 @@ func ValidateNodeUnpublishVolumeRequest(req *csi.NodeUnpublishVolumeRequest) err
 
 	return nil
 }
+
+// CheckReadOnlyManyIsSupported checks the request is to create ReadOnlyMany
+// volume is from source as empty ReadOnlyMany is not supported.
+func CheckReadOnlyManyIsSupported(req *csi.CreateVolumeRequest) error {
+	for _, cap := range req.GetVolumeCapabilities() {
+		if m := cap.GetAccessMode().Mode; m == csi.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY || m == csi.VolumeCapability_AccessMode_SINGLE_NODE_READER_ONLY {
+			if req.GetVolumeContentSource() == nil {
+				return status.Error(codes.InvalidArgument, "readOnly accessMode is supported only with content source")
+			}
+		}
+	}
+	return nil
+}