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netfilter: nft_set_pipapo: .walk does not deal with generations

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[ Upstream commit 2b84e215f8 ]

The .walk callback iterates over the current active set, but it might be
useful to iterate over the next generation set. Use the generation mask
to determine what set view (either current or next generation) is use
for the walk iteration.

Fixes: 3c4287f620 ("nf_tables: Add set type for arbitrary concatenation of ranges")
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
2023-06-16 15:20:04 +02:00
committed by Greg Kroah-Hartman
parent 4004f12aac
commit 45eb6944d0
1 changed files with 5 additions and 1 deletions
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6
net/netfilter/nft_set_pipapo.c
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@@ -1974,12 +1974,16 @@ static void nft_pipapo_walk(const struct nft_ctx *ctx, struct nft_set *set,
struct nft_set_iter *iter)
{
struct nft_pipapo *priv = nft_set_priv(set);
struct net *net = read_pnet(&set->net);
struct nft_pipapo_match *m;
struct nft_pipapo_field *f;
int i, r;
rcu_read_lock();
m = rcu_dereference(priv->match);
if (iter->genmask == nft_genmask_cur(net))
m = rcu_dereference(priv->match);
else
m = priv->clone;
if (unlikely(!m))
goto out;