From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Tariq Toukan <tariqt@nvidia.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-hardening@vger.kernel.org
Subject: [PATCH][net-next] net/mlx4: Use array_size() helper in copy_to_user()
Date: Tue, 28 Sep 2021 15:17:33 -0500 [thread overview]
Message-ID: <20210928201733.GA268467@embeddedor> (raw)
Use array_size() helper instead of the open-coded version in
copy_to_user(). These sorts of multiplication factors need
to be wrapped in array_size().
Link: https://github.com/KSPP/linux/issues/160
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
drivers/net/ethernet/mellanox/mlx4/cq.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
index f7053a74e6a8..4d4f9cf9facb 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
@@ -314,7 +314,8 @@ static int mlx4_init_user_cqes(void *buf, int entries, int cqe_size)
buf += PAGE_SIZE;
}
} else {
- err = copy_to_user((void __user *)buf, init_ents, entries * cqe_size) ?
+ err = copy_to_user((void __user *)buf, init_ents,
+ array_size(entries, cqe_size)) ?
-EFAULT : 0;
}
--
2.27.0
next reply other threads:[~2021-09-28 20:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-28 20:17 Gustavo A. R. Silva [this message]
2021-09-29 10:24 ` [PATCH][net-next] net/mlx4: Use array_size() helper in copy_to_user() Tariq Toukan
2021-09-29 17:21 ` Eric Dumazet
2021-09-29 17:45 ` Tariq Toukan
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