[PATCH 5.14 408/849] netfilter: nft_dynset: relax superfluous check on set updates

Greg Kroah-Hartman
2021-11-16T01:37:04Z

From: Pablo Neira Ayuso <pablo@netfilter.org>

[ Upstream commit 7b1394892de8d95748d05e3ee41e85edb4abbfa1 ]

Relax this condition to make add and update commands idempotent for sets
with no timeout. The eval function already checks if the set element
timeout is available and updates it if the update command is used.

Fixes: 22fe54d5fefc ("netfilter: nf_tables: add support for dynamic set updates")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/netfilter/nft_dynset.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/net/netfilter/nft_dynset.c b/net/netfilter/nft_dynset.c
index 6ba3256fa8449..87f3af4645d9c 100644
--- a/net/netfilter/nft_dynset.c
+++ b/net/netfilter/nft_dynset.c
@@ -198,17 +198,8 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
return -EBUSY;

priv->op = ntohl(nla_get_be32(tb[NFTA_DYNSET_OP]));
- switch (priv->op) {
- case NFT_DYNSET_OP_ADD:
- case NFT_DYNSET_OP_DELETE:
- break;
- case NFT_DYNSET_OP_UPDATE:
- if (!(set->flags & NFT_SET_TIMEOUT))
- return -EOPNOTSUPP;
- break;
- default:
+ if (priv->op > NFT_DYNSET_OP_DELETE)
return -EOPNOTSUPP;
- }

timeout = 0;
if (tb[NFTA_DYNSET_TIMEOUT] != NULL) {
--
2.33.0