+ netdev
On Wed, Jun 03, 2020 at 08:54:36PM +0300, Dan Carpenter wrote:
> We can't leave "counter" set to an error pointer. Otherwise either it
> will lead to an error pointer dereference later in the function or it
> leads to an error pointer dereference when we call mlx5_fc_destroy().
>
> Fixes: 07bab9502641d ("net/mlx5: E-Switch, Refactor eswitch ingress acl codes")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> ---
> .../net/ethernet/mellanox/mlx5/core/esw/acl/ingress_lgcy.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_lgcy.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_lgcy.c
> index 9bda4fe2eafa7..5dc335e621c57 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_lgcy.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_lgcy.c
> @@ -162,10 +162,12 @@ int esw_acl_ingress_lgcy_setup(struct mlx5_eswitch *esw,
>
> if (MLX5_CAP_ESW_INGRESS_ACL(esw->dev, flow_counter)) {
> counter = mlx5_fc_create(esw->dev, false);
> - if (IS_ERR(counter))
> + if (IS_ERR(counter)) {
> esw_warn(esw->dev,
> "vport[%d] configure ingress drop rule counter failed\n",
> vport->vport);
> + counter = NULL;
> + }
> vport->ingress.legacy.drop_counter = counter;
> }
>
> @@ -272,7 +274,7 @@ void esw_acl_ingress_lgcy_cleanup(struct mlx5_eswitch *esw,
> esw_acl_ingress_table_destroy(vport);
>
> clean_drop_counter:
> - if (!IS_ERR_OR_NULL(vport->ingress.legacy.drop_counter)) {
> + if (vport->ingress.legacy.drop_counter) {
> mlx5_fc_destroy(esw->dev, vport->ingress.legacy.drop_counter);
> vport->ingress.legacy.drop_counter = NULL;
> }
> --
> 2.26.2
>
