From 026632ff68db1664988409d0bfebde70897bb7e7 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Fri, 6 Dec 2019 22:49:58 +0100
Subject: [PATCH 4/9] netfilter: nf_tables_offload: return EOPNOTSUPP if rule
specifies no actions
Git-commit: 81ec61074bcf68acfcb2820cda3ff9d9984419c7
Patch-mainline: v5.5-rc3
References: git-fixes
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@netfilter.org>
Acked-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
net/netfilter/nf_tables_offload.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 006cdb0f5900..9fb946934272 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -43,6 +43,9 @@ struct nft_flow_rule *nft_flow_rule_create(const struct nft_rule *rule)
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);
--
2.16.4