netfilter: nft_rbtree: check for next generation when deactivating elements

set->ops->deactivate() is invoked from nft_del_setelem() that happens
from the transaction path, so we have to check if the object is active
in the next generation, not the current.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nft_rbtree.c b/net/netfilter/nft_rbtree.c
index f762094..86fbe5e 100644 (file)
--- a/net/netfilter/nft_rbtree.c
+++ b/net/netfilter/nft_rbtree.c
@@ -170,7 +170,7 @@ static void *nft_rbtree_deactivate(const struct nft_set *set,
        const struct nft_rbtree *priv = nft_set_priv(set);
        const struct rb_node *parent = priv->root.rb_node;
        struct nft_rbtree_elem *rbe, *this = elem->priv;
-       u8 genmask = nft_genmask_cur(read_pnet(&set->pnet));
+       u8 genmask = nft_genmask_next(read_pnet(&set->pnet));
        int d;
 
        while (parent != NULL) {