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From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Sunil Goutham <sgoutham@marvell.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>,
	linux-hardening@vger.kernel.org
Subject: [PATCH][next] net: thunderx: Use struct_size() helper in kmalloc()
Date: Thu, 8 Oct 2020 09:28:06 -0500	[thread overview]
Message-ID: <20201008142806.GA22162@embeddedor> (raw)

Make use of the new struct_size() helper instead of the offsetof() idiom.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/net/ethernet/cavium/thunder/nicvf_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 0a94c396173b..f3b7b443f964 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -2065,8 +2065,8 @@ static void nicvf_set_rx_mode(struct net_device *netdev)
 			mode |= BGX_XCAST_MCAST_FILTER;
 			/* here we need to copy mc addrs */
 			if (netdev_mc_count(netdev)) {
-				mc_list = kmalloc(offsetof(typeof(*mc_list),
-							   mc[netdev_mc_count(netdev)]),
+				mc_list = kmalloc(struct_size(mc_list, mc,
+							      netdev_mc_count(netdev)),
 						  GFP_ATOMIC);
 				if (unlikely(!mc_list))
 					return;
-- 
2.27.0


WARNING: multiple messages have this Message-ID (diff)
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Sunil Goutham <sgoutham@marvell.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, linux-hardening@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>
Subject: [PATCH][next] net: thunderx: Use struct_size() helper in kmalloc()
Date: Thu, 8 Oct 2020 09:28:06 -0500	[thread overview]
Message-ID: <20201008142806.GA22162@embeddedor> (raw)

Make use of the new struct_size() helper instead of the offsetof() idiom.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/net/ethernet/cavium/thunder/nicvf_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 0a94c396173b..f3b7b443f964 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -2065,8 +2065,8 @@ static void nicvf_set_rx_mode(struct net_device *netdev)
 			mode |= BGX_XCAST_MCAST_FILTER;
 			/* here we need to copy mc addrs */
 			if (netdev_mc_count(netdev)) {
-				mc_list = kmalloc(offsetof(typeof(*mc_list),
-							   mc[netdev_mc_count(netdev)]),
+				mc_list = kmalloc(struct_size(mc_list, mc,
+							      netdev_mc_count(netdev)),
 						  GFP_ATOMIC);
 				if (unlikely(!mc_list))
 					return;
-- 
2.27.0


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             reply	other threads:[~2020-10-08 14:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-08 14:28 Gustavo A. R. Silva [this message]
2020-10-08 14:28 ` [PATCH][next] net: thunderx: Use struct_size() helper in kmalloc() Gustavo A. R. Silva
2020-10-10 17:36 ` Jakub Kicinski
2020-10-10 17:36   ` Jakub Kicinski

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