netdev - [PATCH net-next 11/12] macsec: replace custom check on IFLA_MACSEC_ENCODING_SA with NLA_POLICY

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Message-Id: <57f0c81a407a93dcd6d6221ba5b0904b3ba4d63f.1664379352.git.sd@queasysnail.net>
Date:   Wed, 28 Sep 2022 18:28:58 +0200
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     netdev@...r.kernel.org
Cc:     Sabrina Dubroca <sd@...asysnail.net>
Subject: [PATCH net-next 11/12] macsec: replace custom check on IFLA_MACSEC_ENCODING_SA with NLA_POLICY_MAX

Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
---
 drivers/net/macsec.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 81027941bc5b..863e5ae6e75e 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -3653,7 +3653,7 @@ static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
 	[IFLA_MACSEC_ICV_LEN] = NLA_POLICY_RANGE(NLA_U8, MACSEC_MIN_ICV_LEN, MACSEC_STD_ICV_LEN),
 	[IFLA_MACSEC_CIPHER_SUITE] = NLA_POLICY_VALIDATE_FN(NLA_U64, validate_cipher_suite),
 	[IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
-	[IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
+	[IFLA_MACSEC_ENCODING_SA] = NLA_POLICY_MAX(NLA_U8, MACSEC_NUM_AN - 1),
 	[IFLA_MACSEC_ENCRYPT] = NLA_POLICY_MAX(NLA_U8, 1),
 	[IFLA_MACSEC_PROTECT] = NLA_POLICY_MAX(NLA_U8, 1),
 	[IFLA_MACSEC_INC_SCI] = NLA_POLICY_MAX(NLA_U8, 1),
@@ -4144,11 +4144,6 @@ static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
 		}
 	}
 
-	if (data[IFLA_MACSEC_ENCODING_SA]) {
-		if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
-			return -EINVAL;
-	}
-
 	es  = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
 	sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
 	scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
-- 
2.37.3