Use NLA_POLICY_NESTED_ARRAY() to perform nested array validation
in the policy validation step.

The nested policy was already enforced through nla_parse_nested(),
however extack wasn't passed previously.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
---
 drivers/net/wireguard/netlink.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireguard/netlink.c b/drivers/net/wireguard/netlink.c
index 67f962eb8b46d..9bc76e1bcba2d 100644
--- a/drivers/net/wireguard/netlink.c
+++ b/drivers/net/wireguard/netlink.c
@@ -27,7 +27,7 @@ static const struct nla_policy device_policy[WGDEVICE_A_MAX + 1] = {
 	[WGDEVICE_A_FLAGS]		= NLA_POLICY_MASK(NLA_U32, __WGDEVICE_F_ALL),
 	[WGDEVICE_A_LISTEN_PORT]	= { .type = NLA_U16 },
 	[WGDEVICE_A_FWMARK]		= { .type = NLA_U32 },
-	[WGDEVICE_A_PEERS]		= { .type = NLA_NESTED }
+	[WGDEVICE_A_PEERS]		= NLA_POLICY_NESTED_ARRAY(peer_policy),
 };
 
 static const struct nla_policy peer_policy[WGPEER_A_MAX + 1] = {
@@ -39,7 +39,7 @@ static const struct nla_policy peer_policy[WGPEER_A_MAX + 1] = {
 	[WGPEER_A_LAST_HANDSHAKE_TIME]			= NLA_POLICY_EXACT_LEN(sizeof(struct __kernel_timespec)),
 	[WGPEER_A_RX_BYTES]				= { .type = NLA_U64 },
 	[WGPEER_A_TX_BYTES]				= { .type = NLA_U64 },
-	[WGPEER_A_ALLOWEDIPS]				= { .type = NLA_NESTED },
+	[WGPEER_A_ALLOWEDIPS]				= NLA_POLICY_NESTED_ARRAY(allowedip_policy),
 	[WGPEER_A_PROTOCOL_VERSION]			= { .type = NLA_U32 }
 };
 
@@ -467,7 +467,7 @@ static int set_peer(struct wg_device *wg, struct nlattr **attrs)
 
 		nla_for_each_nested(attr, attrs[WGPEER_A_ALLOWEDIPS], rem) {
 			ret = nla_parse_nested(allowedip, WGALLOWEDIP_A_MAX,
-					       attr, allowedip_policy, NULL);
+					       attr, NULL, NULL);
 			if (ret < 0)
 				goto out;
 			ret = set_allowedip(peer, allowedip);
@@ -593,7 +593,7 @@ static int wg_set_device(struct sk_buff *skb, struct genl_info *info)
 
 		nla_for_each_nested(attr, info->attrs[WGDEVICE_A_PEERS], rem) {
 			ret = nla_parse_nested(peer, WGPEER_A_MAX, attr,
-					       peer_policy, NULL);
+					       NULL, NULL);
 			if (ret < 0)
 				goto out;
 			ret = set_peer(wg, peer);
-- 
2.51.0

On 10/29/25 8:51 PM, Asbjørn Sloth Tønnesen wrote:
> diff --git a/drivers/net/wireguard/netlink.c b/drivers/net/wireguard/netlink.c
> index 67f962eb8b46d..9bc76e1bcba2d 100644
> --- a/drivers/net/wireguard/netlink.c
> +++ b/drivers/net/wireguard/netlink.c
> @@ -27,7 +27,7 @@ static const struct nla_policy device_policy[WGDEVICE_A_MAX + 1] = {
>   	[WGDEVICE_A_FLAGS]		= NLA_POLICY_MASK(NLA_U32, __WGDEVICE_F_ALL),
>   	[WGDEVICE_A_LISTEN_PORT]	= { .type = NLA_U16 },
>   	[WGDEVICE_A_FWMARK]		= { .type = NLA_U32 },
> -	[WGDEVICE_A_PEERS]		= { .type = NLA_NESTED }
> +	[WGDEVICE_A_PEERS]		= NLA_POLICY_NESTED_ARRAY(peer_policy),
>   };
>   
>   static const struct nla_policy peer_policy[WGPEER_A_MAX + 1] = {
> @@ -39,7 +39,7 @@ static const struct nla_policy peer_policy[WGPEER_A_MAX + 1] = {
>   	[WGPEER_A_LAST_HANDSHAKE_TIME]			= NLA_POLICY_EXACT_LEN(sizeof(struct __kernel_timespec)),
>   	[WGPEER_A_RX_BYTES]				= { .type = NLA_U64 },
>   	[WGPEER_A_TX_BYTES]				= { .type = NLA_U64 },
> -	[WGPEER_A_ALLOWEDIPS]				= { .type = NLA_NESTED },
> +	[WGPEER_A_ALLOWEDIPS]				= NLA_POLICY_NESTED_ARRAY(allowedip_policy),
>   	[WGPEER_A_PROTOCOL_VERSION]			= { .type = NLA_U32 }
>   };

Oops, I messed this patch up.

I will add forward declarations in v2, which will be removed again once the policy code is generated,
as that will be less messy than reordering the policies.

-- 
pw-bot: changes-requested