From 09a9297574cb10b3d9fe722b2baa9a379b2d289c Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Wed, 3 Jun 2020 20:54:36 +0300 Subject: [PATCH] net/mlx5: E-Switch, Fix some error pointer dereferences 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 Signed-off-by: Saeed Mahameed --- .../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 9bda4fe2eafa..5dc335e621c5 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; }