netdev - [PATCH v2 1/1] ovpn: use kmalloc_array() for array space allocation

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Message-ID: <20250902090051.1451-2-chuguangqing@inspur.com>
Date: Tue, 2 Sep 2025 17:00:51 +0800
From: chuguangqing <chuguangqing@...pur.com>
To: <horms@...nel.org>, Antonio Quartulli <antonio@...nvpn.net>, Sabrina
 Dubroca <sd@...asysnail.net>, Andrew Lunn <andrew+netdev@...n.ch>,
	<davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
	<kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>, chuguangqing
	<chuguangqing@...pur.com>
Subject: [PATCH v2 1/1] ovpn: use kmalloc_array() for array space allocation

Replace kmalloc(size * sizeof) with kmalloc_array() for safer memory
allocation and overflow prevention.

Signed-off-by: chuguangqing <chuguangqing@...pur.com>
---
 drivers/net/ovpn/crypto_aead.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ovpn/crypto_aead.c b/drivers/net/ovpn/crypto_aead.c
index 2cca759feffa..da0ce4f348e6 100644
--- a/drivers/net/ovpn/crypto_aead.c
+++ b/drivers/net/ovpn/crypto_aead.c
@@ -72,8 +72,9 @@ int ovpn_aead_encrypt(struct ovpn_peer *peer, struct ovpn_crypto_key_slot *ks,
 		return -ENOSPC;
 
 	/* sg may be required by async crypto */
-	ovpn_skb_cb(skb)->sg = kmalloc(sizeof(*ovpn_skb_cb(skb)->sg) *
-				       (nfrags + 2), GFP_ATOMIC);
+	ovpn_skb_cb(skb)->sg = kmalloc_array(nfrags + 2,
+					     sizeof(*ovpn_skb_cb(skb)->sg),
+					     GFP_ATOMIC);
 	if (unlikely(!ovpn_skb_cb(skb)->sg))
 		return -ENOMEM;
 
@@ -185,8 +186,9 @@ int ovpn_aead_decrypt(struct ovpn_peer *peer, struct ovpn_crypto_key_slot *ks,
 		return -ENOSPC;
 
 	/* sg may be required by async crypto */
-	ovpn_skb_cb(skb)->sg = kmalloc(sizeof(*ovpn_skb_cb(skb)->sg) *
-				       (nfrags + 2), GFP_ATOMIC);
+	ovpn_skb_cb(skb)->sg = kmalloc_array(nfrags + 2,
+					     sizeof(*ovpn_skb_cb(skb)->sg),
+					     GFP_ATOMIC);
 	if (unlikely(!ovpn_skb_cb(skb)->sg))
 		return -ENOMEM;
 
-- 
2.43.5