From: Yevgeny Kliteynik <kliteyn@nvidia.com>
Date: Wed, 20 Jan 2021 00:53:28 +0000 (+0200)
Subject: net/mlx5: DR, Fix potential shift wrapping of 32-bit value
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bdbc13c204ee3e742289730618002ff9f21109bf;p=linux.git

net/mlx5: DR, Fix potential shift wrapping of 32-bit value

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@oracle.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Alex Vesker <valex@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---

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 b76fdff088907..9ec079247c4b2 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;
 }