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netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX

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Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof()
when resizing hashtable because __GFP_NOWARN is unset.

Similar to:

  b541ba7d1f ("netfilter: conntrack: clamp maximum hashtable size to INT_MAX")

Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2025-04-22 21:52:44 +02:00
parent 4c5c6aa996
commit b85e3367a5
1 changed files with 6 additions and 0 deletions
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6
net/netfilter/nft_set_pipapo.c
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@ -663,6 +663,9 @@ static int pipapo_realloc_mt(struct nft_pipapo_field *f,
check_add_overflow(rules, extra, &rules_alloc))
return -EOVERFLOW;
if (rules_alloc > (INT_MAX / sizeof(*new_mt)))
return -ENOMEM;
new_mt = kvmalloc_array(rules_alloc, sizeof(*new_mt), GFP_KERNEL_ACCOUNT);
if (!new_mt)
return -ENOMEM;
@ -1499,6 +1502,9 @@ static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old)
src->groups * NFT_PIPAPO_BUCKETS(src->bb));
if (src->rules > 0) {
if (src->rules_alloc > (INT_MAX / sizeof(*src->mt)))
goto out_mt;
dst->mt = kvmalloc_array(src->rules_alloc,
sizeof(*src->mt),
GFP_KERNEL_ACCOUNT);