Index: xen-unstable.hg/tools/blktap/lib/xs_api.c
===================================================================
--- xen-unstable.hg.orig/tools/blktap/lib/xs_api.c
+++ xen-unstable.hg/tools/blktap/lib/xs_api.c
@@ -132,7 +132,7 @@ int xs_printf(struct xs_handle *h, const
 		return ENOMEM;
 	}
 
-	ret = xs_write(h, XBT_NULL, path, buf, strlen(buf)+1);
+	ret = xs_write(h, XBT_NULL, path, buf, strlen(buf));
 	
 	free(buf);
 	free(path);