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netfilter: nft_set_pipapo: skip inactive elements during set walk
commit317eb96850
upstream. Otherwise set elements can be deactivated twice which will cause a crash. Reported-by: Xingyuan Mo <hdthky0@gmail.com> Fixes:3c4287f620
("nf_tables: Add set type for arbitrary concatenation of ranges") Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2042,6 +2042,9 @@ static void nft_pipapo_walk(const struct nft_ctx *ctx, struct nft_set *set,
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e = f->mt[r].e;
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e = f->mt[r].e;
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if (!nft_set_elem_active(&e->ext, iter->genmask))
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goto cont;
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elem.priv = e;
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elem.priv = e;
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iter->err = iter->fn(ctx, set, iter, &elem);
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iter->err = iter->fn(ctx, set, iter, &elem);
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