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netfilter: nft_set_rbtree: .deactivate fails if element has expired
commit d111692 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: 8d8540c ("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>
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