This is a note to let you know that I've just added the patch titled netfilter: nf_tables_offload: return EOPNOTSUPP if rule specifies no actions to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: netfilter-nf_tables_offload-return-eopnotsupp-if-rul.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f6088ecb70d1d6cd77c56e4e293d08325654a268 Author: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> Date: Fri Dec 6 22:49:58 2019 +0100 netfilter: nf_tables_offload: return EOPNOTSUPP if rule specifies no actions [ Upstream commit 81ec61074bcf68acfcb2820cda3ff9d9984419c7 ] If the rule only specifies the matching side, return EOPNOTSUPP. Otherwise, the front-end relies on the drivers to reject this rule. Fixes: c9626a2cbdb2 ("netfilter: nf_tables: add hardware offload support") Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c index 6f7eab502e65..e743f811245f 100644 --- a/net/netfilter/nf_tables_offload.c +++ b/net/netfilter/nf_tables_offload.c @@ -44,6 +44,9 @@ struct nft_flow_rule *nft_flow_rule_create(struct net *net, expr = nft_expr_next(expr); } + if (num_actions == 0) + return ERR_PTR(-EOPNOTSUPP); + flow = nft_flow_rule_alloc(num_actions); if (!flow) return ERR_PTR(-ENOMEM);