netdev - [PATCH net] net/mlx5e: Fix use after free in mlx5e_fs

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Date:   Thu, 4 Aug 2022 17:43:21 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Saeed Mahameed <saeedm@...dia.com>, Lama Kayal <lkayal@...dia.com>
Cc:     Leon Romanovsky <leon@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Tariq Toukan <tariqt@...dia.com>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH net] net/mlx5e: Fix use after free in mlx5e_fs_init()

Call mlx5e_fs_vlan_free(fs) before kvfree(fs).

Fixes: af8bbf730068 ("net/mlx5e: Convert mlx5e_flow_steering member of mlx5e_priv to pointer")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
This applies to net but I never really understand how mellanox patches
work...

 drivers/net/ethernet/mellanox/mlx5/core/en_fs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
index e2a9b9be5c1f..e0ce5a233d0b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
@@ -1395,10 +1395,11 @@ struct mlx5e_flow_steering *mlx5e_fs_init(const struct mlx5e_profile *profile,
 	}
 
 	return fs;
-err_free_fs:
-	kvfree(fs);
+
 err_free_vlan:
 	mlx5e_fs_vlan_free(fs);
+err_free_fs:
+	kvfree(fs);
 err:
 	return NULL;
 }
-- 
2.35.1