From b6aaaa22aeb66cda787d0e0280742da3d735def3 Mon Sep 17 00:00:00 2001 From: Shiri Kuzin Date: Tue, 19 Jan 2021 19:07:00 +0200 Subject: [PATCH] net/mlx5: refuse empty VLAN in flow pattern In verbs, an empty VLAN is equivalent to a packet without VLAN layer, hence, the VLAN item should not be empty and this case is rejected. However, the case for ether type of VLAN without following VLAN item was not validated, allowing the creation of a flow with empty VLAN item. To fix this issue a validation was added requiring ether type of VLAN will be followed with VLAN item. Fixes: 0b1edd21cd78 ("net/mlx5: refuse empty VLAN flow specification") Cc: stable@dpdk.org Signed-off-by: Shiri Kuzin Acked-by: Matan Azrad --- drivers/net/mlx5/mlx5_flow_verbs.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/mlx5/mlx5_flow_verbs.c b/drivers/net/mlx5/mlx5_flow_verbs.c index 205b05783c..b442b9b91c 100644 --- a/drivers/net/mlx5/mlx5_flow_verbs.c +++ b/drivers/net/mlx5/mlx5_flow_verbs.c @@ -1256,6 +1256,7 @@ flow_verbs_validate(struct rte_eth_dev *dev, uint64_t last_item = 0; uint8_t next_protocol = 0xff; uint16_t ether_type = 0; + bool is_empty_vlan = false; if (items == NULL) return -1; @@ -1283,6 +1284,8 @@ flow_verbs_validate(struct rte_eth_dev *dev, ether_type &= ((const struct rte_flow_item_eth *) items->mask)->type; + if (ether_type == RTE_BE16(RTE_ETHER_TYPE_VLAN)) + is_empty_vlan = true; ether_type = rte_be_to_cpu_16(ether_type); } else { ether_type = 0; @@ -1308,6 +1311,7 @@ flow_verbs_validate(struct rte_eth_dev *dev, } else { ether_type = 0; } + is_empty_vlan = false; break; case RTE_FLOW_ITEM_TYPE_IPV4: ret = mlx5_flow_validate_item_ipv4 @@ -1419,6 +1423,10 @@ flow_verbs_validate(struct rte_eth_dev *dev, } item_flags |= last_item; } + if (is_empty_vlan) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ITEM, NULL, + "VLAN matching without vid specification is not supported"); for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) { switch (actions->type) { case RTE_FLOW_ACTION_TYPE_VOID: -- 2.20.1