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commitd111692a59upstream. 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:8d8540c4f5("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>