On Thu, Dec 30, 2021 at 01:25:58PM +0800, Zizhuang Deng wrote:
add missing vport return value checks for recent code, as in [1].
Ref:
[1] https://lkml.org/lkml/2020/11/1/315
Where did this patch come from ? real bug ? or just aligning the code to
be according the link below ?
because all the use-cases below are supposed to be guaranteed to have a
valid vport object for uplink/pf/and ecpf vportrs, i am not against the
patch, I am just trying to understand if there is a hidden bug somewhere ..
Signed-off-by: Zizhuang Deng <sunsetdzz@xxxxxxxxx>
---
.../mellanox/mlx5/core/eswitch_offloads.c | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index f4eaa5893886..fda214021738 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
[...]
@@ -1309,11 +1317,15 @@ static void esw_del_fdb_peer_miss_rules(struct mlx5_eswitch *esw)
if (mlx5_ecpf_vport_exists(esw->dev)) {
vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_ECPF);
+ if (IS_ERR(vport))
+ return;
memleak, we need to hit kvfree(flows) below,
instead of returning you should make the del_flow conditional and continue
to next steps in the esw_del_fdb_peer_miss_rules routine,
e.g:
if (vport)
mlx5_del_flow_rules(flows[vport->index]);
mlx5_del_flow_rules(flows[vport->index]);
}
if (mlx5_core_is_ecpf_esw_manager(esw->dev)) {
vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_PF);
+ if (IS_ERR(vport))
+ return;
ditto
mlx5_del_flow_rules(flows[vport->index]);
}
kvfree(flows);
@@ -2385,6 +2397,9 @@ static int esw_set_uplink_slave_ingress_root(struct mlx5_core_dev *master,
if (master) {
esw = master->priv.eswitch;
vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_UPLINK);
+ if (IS_ERR(vport))
+ return PTR_ERR(vport);
+
MLX5_SET(set_flow_table_root_in, in, table_of_other_vport, 1);
MLX5_SET(set_flow_table_root_in, in, table_vport_number,
MLX5_VPORT_UPLINK);
@@ -2405,6 +2420,9 @@ static int esw_set_uplink_slave_ingress_root(struct mlx5_core_dev *master,
} else {
esw = slave->priv.eswitch;
vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_UPLINK);
+ if (IS_ERR(vport))
+ return PTR_ERR(vport);
+
ns = mlx5_get_flow_vport_acl_namespace(slave,
MLX5_FLOW_NAMESPACE_ESW_INGRESS,
vport->index);
@@ -2590,6 +2608,8 @@ static void esw_unset_master_egress_rule(struct mlx5_core_dev *dev)
vport = mlx5_eswitch_get_vport(dev->priv.eswitch,
dev->priv.eswitch->manager_vport);
+ if (IS_ERR(vport))
+ return;
esw_acl_egress_ofld_cleanup(vport);
}
--
2.25.1
