[PATCH] net/mlx5/hws: fix null dereference in rule skip

[Shani Peretz <shperetz@nvidia.com>]

When using template API with a represented_port pattern item that
has no spec, mlx5dr_rule_skip() dereferences a NULL pointer when
accessing v->port_id.

Now validating the spec before accessing port_id.

Fixes: 405242c52dd5 ("net/mlx5/hws: add rule object")
Cc: stable@dpdk.org

Signed-off-by: Shani Peretz <shperetz@nvidia.com>
Acked-by: Bing Zhao <bingz@nvidia.com>
---
 drivers/net/mlx5/hws/mlx5dr_rule.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/mlx5/hws/mlx5dr_rule.c b/drivers/net/mlx5/hws/mlx5dr_rule.c
index 895ac858ec..23327d2b73 100644
--- a/drivers/net/mlx5/hws/mlx5dr_rule.c
+++ b/drivers/net/mlx5/hws/mlx5dr_rule.c
@@ -38,6 +38,10 @@ static void mlx5dr_rule_skip(struct mlx5dr_matcher *matcher,
 
 	if (mt->item_flags & MLX5_FLOW_ITEM_REPRESENTED_PORT) {
 		v = items[mt->vport_item_id].spec;
+		if (unlikely(!v)) {
+			DR_LOG(NOTICE, "Fail to get vport item, ignoring");
+			return;
+		}
 		vport = flow_hw_conv_port_id(matcher->tbl->ctx, v->port_id);
 		if (unlikely(!vport)) {
 			DR_LOG(ERR, "Fail to map port ID %d, ignoring", v->port_id);
-- 
2.43.0