netdev - [PATCH v1] nfp: bpf: Use kmemdup_array instead of kmemdup for multiple allocation

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Message-Id: <20240821081447.12430-1-yujiaoliang@vivo.com>
Date: Wed, 21 Aug 2024 16:14:45 +0800
From: Yu Jiaoliang <yujiaoliang@...o.com>
To: Jakub Kicinski <kuba@...nel.org>,
	Louis Peens <louis.peens@...igine.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	bpf@...r.kernel.org,
	oss-drivers@...igine.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: opensource.kernel@...o.com
Subject: [PATCH v1] nfp: bpf: Use kmemdup_array instead of kmemdup for multiple allocation

Let the kememdup_array() take care about multiplication and possible
overflows.

Signed-off-by: Yu Jiaoliang <yujiaoliang@...o.com>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index df2ab5cbd49b..3a02eef58cc6 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -4537,8 +4537,8 @@ void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv)
 	u64 *prog;
 	int err;
 
-	prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64),
-		       GFP_KERNEL);
+	prog = kmemdup_array(nfp_prog->prog, nfp_prog->prog_len, sizeof(u64),
+			     GFP_KERNEL);
 	if (!prog)
 		return ERR_PTR(-ENOMEM);
 
-- 
2.34.1