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netfilter: nft_set_pipapo: release elements in clone only from destroy path 

[ Upstream commit b0e256f3dd ]

Clone already always provides a current view of the lookup table, use it
to destroy the set, otherwise it is possible to destroy elements twice.

This fix requires:

 212ed75dc5 ("netfilter: nf_tables: integrate pipapo into commit protocol")

which came after:

 9827a0e6e2 ("netfilter: nft_set_pipapo: release elements in clone from abort path").

Fixes: 9827a0e6e2 ("netfilter: nft_set_pipapo: release elements in clone from abort path")
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 2024-03-10 10:02:41 +01:00 committed by Sasha Levin
parent 19ab464c14
commit 9384b4d85c
1 changed files with 1 additions and 4 deletions
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5
net/netfilter/nft_set_pipapo.c
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@ -2244,8 +2244,6 @@ static void nft_pipapo_destroy(const struct nft_ctx *ctx,
if (m) {
rcu_barrier();
nft_set_pipapo_match_destroy(ctx, set, m);
for_each_possible_cpu(cpu)
pipapo_free_scratch(m, cpu);
free_percpu(m->scratch);
@ -2257,8 +2255,7 @@ static void nft_pipapo_destroy(const struct nft_ctx *ctx,
if (priv->clone) {
m = priv->clone;
if (priv->dirty)
nft_set_pipapo_match_destroy(ctx, set, m);
nft_set_pipapo_match_destroy(ctx, set, m);
for_each_possible_cpu(cpu)
pipapo_free_scratch(priv->clone, cpu);