[PATCH v2 1/3] net/rnp: add check firmware respond info

[Wenbo Cao]

Add logic checks at critical points to detect potentially illegal
firmware information, preventing subsequent logic exceptions.

Fixes: 52aae4ed4ffb ("net/rnp: add device capabilities")
Fixes: 52dfb84e14be ("net/rnp: add device init and uninit")
Cc: stable at dpdk.org

Signed-off-by: Wenbo Cao <caowenbo at mucse.com>
Reviewed-by: Stephen Hemminger <stephen at networkplumber.org>
---
 drivers/net/rnp/base/rnp_mbx_fw.c | 15 ++++++++++++++-
 drivers/net/rnp/rnp_ethdev.c      | 16 ++++++++--------
 2 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/net/rnp/base/rnp_mbx_fw.c b/drivers/net/rnp/base/rnp_mbx_fw.c
index 3e7cf7f9ad..9e0b1730c2 100644
--- a/drivers/net/rnp/base/rnp_mbx_fw.c
+++ b/drivers/net/rnp/base/rnp_mbx_fw.c
@@ -230,6 +230,7 @@ rnp_fw_get_phy_capability(struct rnp_eth_port *port,
 	return 0;
 }
 
+#define RNP_MAX_LANE_MASK	(0xf)
 int rnp_mbx_fw_get_capability(struct rnp_eth_port *port)
 {
 	struct rnp_phy_abilities_rep ability;
@@ -252,17 +253,29 @@ int rnp_mbx_fw_get_capability(struct rnp_eth_port *port)
 		hw->nic_mode = ability.nic_mode;
 		/* get phy<->lane mapping info */
 		lane_cnt = rte_popcount32(hw->lane_mask);
+		if (lane_cnt > RNP_MAX_PORT_OF_PF) {
+			RNP_PMD_LOG(ERR, "firmware invalid lane_mask");
+			return -EINVAL;
+		}
 		temp_mask = hw->lane_mask;
+		if (temp_mask == 0 || temp_mask > RNP_MAX_LANE_MASK) {
+			RNP_PMD_LOG(ERR, "lane_mask is invalid 0x%.2x", temp_mask);
+			return -EINVAL;
+		}
 		if (ability.e.ports_is_sgmii_valid)
 			is_sgmii_bits = ability.e.lane_is_sgmii;
 		for (idx = 0; idx < lane_cnt; idx++) {
 			hw->phy_port_ids[idx] = port_ids[idx];
+			if (temp_mask == 0) {
+				RNP_PMD_LOG(ERR, "temp_mask is zero at idx=%d", idx);
+				return -EINVAL;
+			}
 			lane_bit = ffs(temp_mask) - 1;
 			lane_idx = port_ids[idx] % lane_cnt;
 			hw->lane_of_port[lane_idx] = lane_bit;
 			is_sgmii = lane_bit & is_sgmii_bits ? 1 : 0;
 			hw->lane_is_sgmii[lane_idx] = is_sgmii;
-			temp_mask &= ~RTE_BIT32(lane_bit);
+			temp_mask &= ~(1ULL << lane_bit);
 		}
 		hw->max_port_num = lane_cnt;
 	}
diff --git a/drivers/net/rnp/rnp_ethdev.c b/drivers/net/rnp/rnp_ethdev.c
index de1c077f61..24eb0b16dd 100644
--- a/drivers/net/rnp/rnp_ethdev.c
+++ b/drivers/net/rnp/rnp_ethdev.c
@@ -751,17 +751,17 @@ rnp_get_speed_caps(struct rte_eth_dev *dev)
 {
 	struct rnp_eth_port *port = RNP_DEV_TO_PORT(dev);
 	uint32_t speed_cap = 0;
-	uint32_t i = 0, speed;
 	uint32_t support_link;
-	uint32_t link_types;
+	uint32_t speed = 0;
+	int bit_pos = 0;
 
 	support_link = port->attr.phy_meta.supported_link;
-	link_types = rte_popcount64(support_link);
-	if (!link_types)
+	if (support_link == 0)
 		return 0;
-	for (i = 0; i < link_types; i++) {
-		speed = ffs(support_link) - 1;
-		switch (RTE_BIT32(speed)) {
+	while (support_link) {
+		bit_pos = rte_ffs32(support_link) - 1;
+		speed = RTE_BIT32(bit_pos);
+		switch (speed) {
 		case RNP_SPEED_CAP_10M_FULL:
 			speed_cap |= RTE_ETH_LINK_SPEED_10M;
 			break;
@@ -789,7 +789,7 @@ rnp_get_speed_caps(struct rte_eth_dev *dev)
 		default:
 			speed_cap |= 0;
 		}
-		support_link &= ~RTE_BIT32(speed);
+		support_link &= ~speed;
 	}
 	if (!port->attr.phy_meta.link_autoneg)
 		speed_cap |= RTE_ETH_LINK_SPEED_FIXED;
-- 
2.34.1