5.15-stable review patch. If anyone has any objections, please let me know.
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From: Florian Westphal fw@strlen.de
commit 317eb9685095678f2c9f5a8189de698c5354316a upstream.
Otherwise set elements can be deactivated twice which will cause a crash.
Reported-by: Xingyuan Mo hdthky0@gmail.com Fixes: 3c4287f62044 ("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 --- net/netfilter/nft_set_pipapo.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/net/netfilter/nft_set_pipapo.c +++ b/net/netfilter/nft_set_pipapo.c @@ -2042,6 +2042,9 @@ static void nft_pipapo_walk(const struct
e = f->mt[r].e;
+ if (!nft_set_elem_active(&e->ext, iter->genmask)) + goto cont; + elem.priv = e;
iter->err = iter->fn(ctx, set, iter, &elem);