netlink: Catch unknown types when deserializing objects

Print an error message and discard the object instead of returning it to
the caller. At least when trying to print it, we would hit an assert()
in obj_type_name() anyway.

Fixes: 4756d92e517ae ("src: listing of stateful objects")
Signed-off-by: Phil Sutter <phil@nwl.cc>

diff --git a/src/netlink.c b/src/netlink.c
index 0724190a25d6fe4cca9e42ee6d8620f04e41817a..52010c74d4f30e3197f2b77d3f9c0b8d4827fc96 100644 (file)
--- a/src/netlink.c
+++ b/src/netlink.c
@@ -1802,6 +1802,10 @@ struct obj *netlink_delinearize_obj(struct netlink_ctx *ctx,
                obj->synproxy.flags =
                        nftnl_obj_get_u32(nlo, NFTNL_OBJ_SYNPROXY_FLAGS);
                break;
+       default:
+               netlink_io_error(ctx, NULL, "Unknown object type %u", type);
+               obj_free(obj);
+               return NULL;
        }
        obj->type = type;