Whenever a new version adds udata support to an expression, then old versions of nft will crash when trying to list such a ruleset generated by a more recent version of nftables. Fix this by falling back to 'type' format. Signed-off-by: Florian Westphal <fw@xxxxxxxxx> --- src/netlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/netlink.c b/src/netlink.c index 25ee3419772b..5825a68d03bc 100644 --- a/src/netlink.c +++ b/src/netlink.c @@ -913,7 +913,7 @@ static struct expr *set_make_key(const struct nftnl_udata *attr) etype = nftnl_udata_get_u32(ud[NFTNL_UDATA_SET_TYPEOF_EXPR]); ops = expr_ops_by_type_u32(etype); - if (!ops) + if (!ops || !ops->parse_udata) return NULL; expr = ops->parse_udata(ud[NFTNL_UDATA_SET_TYPEOF_DATA]); -- 2.49.0
