[PATCH 5.10 043/201] netfilter: nftables: add helper function to validate set element data

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From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>

[ Upstream commit 97c976d662fb9080a6a5d1e1a108c7a1f5c9484d ]

When binding sets to rule, validate set element data according to
set definition. This patch adds a helper function to be reused by
the catch-all set element support.

Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Stable-dep-of: 0a771f7b266b ("netfilter: nf_tables: skip immediate deactivate in _PREPARE_ERROR")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 net/netfilter/nf_tables_api.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 356416564d9f4..5ef9acba7c171 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -4576,10 +4576,9 @@ static int nft_validate_register_store(const struct nft_ctx *ctx,
 				       enum nft_data_types type,
 				       unsigned int len);
 
-static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
-					struct nft_set *set,
-					const struct nft_set_iter *iter,
-					struct nft_set_elem *elem)
+static int nft_setelem_data_validate(const struct nft_ctx *ctx,
+				     struct nft_set *set,
+				     struct nft_set_elem *elem)
 {
 	const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
 	enum nft_registers dreg;
@@ -4591,6 +4590,14 @@ static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
 					   set->dlen);
 }
 
+static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
+					struct nft_set *set,
+					const struct nft_set_iter *iter,
+					struct nft_set_elem *elem)
+{
+	return nft_setelem_data_validate(ctx, set, elem);
+}
+
 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
 		       struct nft_set_binding *binding)
 {
-- 
2.39.2






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