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netfilter: nf_tables_offload: return EOPNOTSUPP if rule specifies no actions

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[ 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: c9626a2cbd ("netfilter: nf_tables: add hardware offload support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pablo Neira Ayuso 2019-12-06 22:49:58 +01:00 • committed by Greg Kroah-Hartman
commit 36d08a41d2
1 changed files with 3 additions and 0 deletions
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3
net/netfilter/nf_tables_offload.c
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@ -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);