From: Pablo Neira Ayuso pablo@netfilter.org
[ Upstream commit c88c535b592d3baeee74009f3eceeeaf0fdd5e1b ]
Anonymous sets come with NFT_SET_CONSTANT from userspace. Although API allows to create anonymous sets without NFT_SET_CONSTANT, it makes no sense to allow to add and to delete elements for bound anonymous sets.
Fixes: 96518518cc41 ("netfilter: add nftables") Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nf_tables_api.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 337bab663540a..2cd83d09f4192 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -6590,7 +6590,8 @@ static int nf_tables_newsetelem(struct sk_buff *skb, if (IS_ERR(set)) return PTR_ERR(set);
- if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) + if (!list_empty(&set->bindings) && + (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS))) return -EBUSY;
nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla); @@ -6864,7 +6865,9 @@ static int nf_tables_delsetelem(struct sk_buff *skb, set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask); if (IS_ERR(set)) return PTR_ERR(set); - if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) + + if (!list_empty(&set->bindings) && + (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS))) return -EBUSY;
nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);