netdev - [PATCH net-next v2 04/13] macsec: replace custom checks on MACSEC_SA_ATTR_KEYID with NLA_POLICY_EXACT

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Message-ID: <c4c113328962aae4146183e7a27854e854c796fb.1756202772.git.sd@queasysnail.net>
Date: Tue, 26 Aug 2025 15:16:22 +0200
From: Sabrina Dubroca <sd@...asysnail.net>
To: netdev@...r.kernel.org
Cc: Sabrina Dubroca <sd@...asysnail.net>
Subject: [PATCH net-next v2 04/13] macsec: replace custom checks on MACSEC_SA_ATTR_KEYID with NLA_POLICY_EXACT_LEN

The existing checks already specify that MACSEC_SA_ATTR_KEYID must
have length MACSEC_KEYID_LEN.

Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
---
 drivers/net/macsec.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 4bff2c90ff49..1b59f2c6b393 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -1672,8 +1672,7 @@ static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
 	[MACSEC_SA_ATTR_AN] = NLA_POLICY_MAX(NLA_U8, MACSEC_NUM_AN - 1),
 	[MACSEC_SA_ATTR_ACTIVE] = NLA_POLICY_MAX(NLA_U8, 1),
 	[MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
-	[MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
-				   .len = MACSEC_KEYID_LEN, },
+	[MACSEC_SA_ATTR_KEYID] = NLA_POLICY_EXACT_LEN(MACSEC_KEYID_LEN),
 	[MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
 				 .len = MACSEC_MAX_KEY_LEN, },
 	[MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
@@ -1737,9 +1736,6 @@ static bool validate_add_rxsa(struct nlattr **attrs)
 	    nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
 		return false;
 
-	if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
-		return false;
-
 	return true;
 }
 
@@ -1960,9 +1956,6 @@ static bool validate_add_txsa(struct nlattr **attrs)
 	if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
 		return false;
 
-	if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
-		return false;
-
 	return true;
 }
 
-- 
2.50.0