| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 207/563] netfilter: nft_set_pipapo: allocate pcpu scratch maps on clone | Date | Mon, 24 Jan 2022 19:39:32 +0100 |
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From: Florian Westphal <fw@strlen.de>
[ Upstream commit 23c54263efd7cb605e2f7af72717a2a951999217 ]
This is needed in case a new transaction is made that doesn't insert any new elements into an already existing set.
Else, after second 'nft -f ruleset.txt', lookups in such a set will fail because ->lookup() encounters raw_cpu_ptr(m->scratch) == NULL.
For the initial rule load, insertion of elements takes care of the allocation, but for rule reloads this isn't guaranteed: we might not have additions to the set.
Fixes: 3c4287f62044a90e ("nf_tables: Add set type for arbitrary concatenation of ranges") Reported-by: etkaar <lists.netfilter.org@prvy.eu> Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- net/netfilter/nft_set_pipapo.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c index 2d73f265b12c9..f67c4436c5d31 100644 --- a/net/netfilter/nft_set_pipapo.c +++ b/net/netfilter/nft_set_pipapo.c @@ -1290,6 +1290,11 @@ static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old) if (!new->scratch_aligned) goto out_scratch; #endif + for_each_possible_cpu(i) + *per_cpu_ptr(new->scratch, i) = NULL; + + if (pipapo_realloc_scratch(new, old->bsize_max)) + goto out_scratch_realloc; rcu_head_init(&new->rcu); @@ -1334,6 +1339,9 @@ out_lt: kvfree(dst->lt); dst--; } +out_scratch_realloc: + for_each_possible_cpu(i) + kfree(*per_cpu_ptr(new->scratch, i)); #ifdef NFT_PIPAPO_ALIGN free_percpu(new->scratch_aligned); #endif -- 2.34.1
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