@@ -284,7 +284,11 @@ static int cfg_update_defaults(cfg_group_meta_t	*meta,

 				meta->array = array;

 				clone_done = 1;

 			}

-			memcpy(ginst->vars + var->offset, new_val, cfg_var_size(var));

+			if(ginst->vars + var->offset) {

+				memcpy(ginst->vars + var->offset, new_val, cfg_var_size(var));

+			} else {

+				LM_ERR("invalid variable offset\n");

+			}

 		}

 	}

 	return 0;

@@ -1122,6 +1126,10 @@ int cfg_commit(cfg_ctx_t *ctx)

 			}

 			p = group_inst->vars + changed->var->offset;

 		}

+		if(p==NULL) {

+			LM_ERR("failed to resolve valid variable offset\n");

+			goto error;

+		}

 		if (((changed->group_id_set && !changed->del_value

 						&& CFG_VAR_TEST_AND_SET(group_inst, changed->var))