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net/mlx5e: Fix possible use-after-free deleting fdb rule 

After neigh-update-add failure we are still with a slow path rule but
the driver always assume the rule is an fdb rule.
Fix neigh-update-del by checking slow path tc flag on the flow.
Also fix neigh-update-add for when neigh-update-del fails the same.

Fixes: 5dbe906ff1 ("net/mlx5e: Use a slow path rule instead if vxlan neighbour isn't available")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Roi Dayan 2021-08-22 10:14:58 +03:00 committed by Saeed Mahameed
parent 8e7e2e8ed0
commit 9a5f9cc794
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
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@ -147,7 +147,7 @@ void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
mlx5e_rep_queue_neigh_stats_work(priv);
list_for_each_entry(flow, flow_list, tmp_list) {
if (!mlx5e_is_offloaded_flow(flow))
if (!mlx5e_is_offloaded_flow(flow) || !flow_flag_test(flow, SLOW))
continue;
attr = flow->attr;
esw_attr = attr->esw_attr;
@ -188,7 +188,7 @@ void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
int err;
list_for_each_entry(flow, flow_list, tmp_list) {
if (!mlx5e_is_offloaded_flow(flow))
if (!mlx5e_is_offloaded_flow(flow) || flow_flag_test(flow, SLOW))
continue;
attr = flow->attr;
esw_attr = attr->esw_attr;