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authorPablo Neira Ayuso <pablo@netfilter.org>2023-06-16 15:20:16 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2023-06-20 22:43:40 +0200
commitc88c535b592d3baeee74009f3eceeeaf0fdd5e1b (patch)
tree7e24dc148b8638bde3fd07bfe5f2f308f3d26bf0 /net
parentd6b478666ffa6d2c25386d78bf1c4640d4da305e (diff)
netfilter: nf_tables: disallow element updates of bound anonymous sets
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>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_tables_api.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index cf10b3bd5c0f..6f26520bd865 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6779,7 +6779,8 @@ 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);
@@ -7053,7 +7054,9 @@ 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);