4.19-stable review patch. If anyone has any objections, please let me know.
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From: Pablo Neira Ayuso pablo@netfilter.org
commit d111692a59c1470ae530cbb39bcf0346c950ecc7 upstream.
This allows to remove an expired element which is not possible in other existing set backends, this is more noticeable if gc-interval is high so expired elements remain in the tree. On-demand gc also does not help in this case, because this is delete element path. Return NULL if element has expired.
Fixes: 8d8540c4f5e0 ("netfilter: nft_set_rbtree: add timeout support") Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/netfilter/nft_set_rbtree.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/netfilter/nft_set_rbtree.c +++ b/net/netfilter/nft_set_rbtree.c @@ -326,6 +326,8 @@ static void *nft_rbtree_deactivate(const nft_rbtree_interval_end(this)) { parent = parent->rb_right; continue; + } else if (nft_set_elem_expired(&rbe->ext)) { + break; } else if (!nft_set_elem_active(&rbe->ext, genmask)) { parent = parent->rb_left; continue;