netdev - [net-next 01/11] net/mlx5: DR, Fix potential shift wrapping of 32-bit value

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Message-Id: <20210130022618.317351-2-saeed@kernel.org>
Date:   Fri, 29 Jan 2021 18:26:08 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, Leon Romanovsky <leonro@...dia.com>,
        Yevgeny Kliteynik <kliteyn@...dia.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Alex Vesker <valex@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 01/11] net/mlx5: DR, Fix potential shift wrapping of 32-bit value

From: Yevgeny Kliteynik <kliteyn@...dia.com>

Fix 32-bit variable shift wrapping in dr_ste_v0_get_miss_addr.

Fixes: 6b93b400aa88 ("net/mlx5: DR, Move STEv0 setters and getters")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@...dia.com>
Reviewed-by: Alex Vesker <valex@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c
index b76fdff08890..9ec079247c4b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c
@@ -248,8 +248,8 @@ static void dr_ste_v0_set_miss_addr(u8 *hw_ste_p, u64 miss_addr)
 static u64 dr_ste_v0_get_miss_addr(u8 *hw_ste_p)
 {
 	u64 index =
-		(MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_31_6) |
-		 MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_39_32) << 26);
+		((u64)MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_31_6) |
+		 ((u64)MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_39_32)) << 26);
 
 	return index << 6;
 }
-- 
2.29.2