netdev - [PATCH v2 2/2] net/mlx5: Fix null-ptr-deref in mlx5_create_ttc

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Message-Id: <20250408154058.106668-2-bsdhenrymartin@gmail.com>
Date: Tue,  8 Apr 2025 23:40:58 +0800
From: Henry Martin <bsdhenrymartin@...il.com>
To: saeedm@...dia.com,
	leon@...nel.org,
	tariqt@...dia.com,
	andrew+netdev@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: ayal@...dia.com,
	amirtz@...dia.com,
	bsdhenrymartin@...il.com,
	netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] net/mlx5: Fix null-ptr-deref in  mlx5_create_ttc_table()

Add NULL check for mlx5_get_flow_namespace() returns in
mlx5_create_ttc_table() to prevent NULL pointer dereference.

Fixes: 137f3d50ad2a ("net/mlx5: Support matching on l4_type for ttc_table")
Signed-off-by: Henry Martin <bsdhenrymartin@...il.com>
---
V1 -> V2: Add a empty line after the return statement.

 drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c
index ecf4b60ddd96..18cc6960a5c1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c
@@ -731,6 +731,9 @@ struct mlx5_ttc_table *mlx5_create_ttc_table(struct mlx5_core_dev *dev,
 	}
 
 	ns = mlx5_get_flow_namespace(dev, params->ns_type);
+	if (!ns)
+		return ERR_PTR(-EOPNOTSUPP);
+
 	groups = use_l4_type ? &ttc_groups[TTC_GROUPS_USE_L4_TYPE] :
 			       &ttc_groups[TTC_GROUPS_DEFAULT];
 
-- 
2.34.1