6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Wentao Liang <vulab@xxxxxxxxxxx>
[ Upstream commit eab0396353be1c778eba1c0b5180176f04dd21ce ]
In mlx5_chains_create_table(), the return value of mlx5_get_fdb_sub_ns()
and mlx5_get_flow_namespace() must be checked to prevent NULL pointer
dereferences. If either function fails, the function should log error
message with mlx5_core_warn() and return error pointer.
Fixes: 39ac237ce009 ("net/mlx5: E-Switch, Refactor chains and priorities")
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
Reviewed-by: Tariq Toukan <tariqt@xxxxxxxxxx>
Link: https://patch.msgid.link/20250307021820.2646-1-vulab@xxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c
index a80ecb672f33d..711d14dea2485 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c
@@ -196,6 +196,11 @@ mlx5_chains_create_table(struct mlx5_fs_chains *chains,
ns = mlx5_get_flow_namespace(chains->dev, chains->ns);
}
+ if (!ns) {
+ mlx5_core_warn(chains->dev, "Failed to get flow namespace\n");
+ return ERR_PTR(-EOPNOTSUPP);
+ }
+
ft_attr.autogroup.num_reserved_entries = 2;
ft_attr.autogroup.max_num_groups = chains->group_num;
ft = mlx5_create_auto_grouped_flow_table(ns, &ft_attr);
--
2.39.5
