[PATCH] net/mana: prevent values overflow returned from RDMA layer

[longli at linuxonhyperv.com]

From: Long Li <longli at microsoft.com>

The device capabilities reported from RDMA layer are in int. Those values can
overflow with the data types defined in dev_info_get().

Fix this by doing a upper bound before returning those values.

Fixes: 517ed6e2d590 ("net/mana: add basic driver with build environment")
Cc: stable at dpdk.org
Signed-off-by: Long Li <longli at microsoft.com>
---
 drivers/net/mana/mana.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/net/mana/mana.c b/drivers/net/mana/mana.c
index 781ed76139..471beed19e 100644
--- a/drivers/net/mana/mana.c
+++ b/drivers/net/mana/mana.c
@@ -296,8 +296,8 @@ mana_dev_info_get(struct rte_eth_dev *dev,
 	dev_info->min_rx_bufsize = MIN_RX_BUF_SIZE;
 	dev_info->max_rx_pktlen = MANA_MAX_MTU + RTE_ETHER_HDR_LEN;
 
-	dev_info->max_rx_queues = priv->max_rx_queues;
-	dev_info->max_tx_queues = priv->max_tx_queues;
+	dev_info->max_rx_queues = RTE_MIN(priv->max_rx_queues, UINT16_MAX);
+	dev_info->max_tx_queues = RTE_MIN(priv->max_tx_queues, UINT16_MAX);
 
 	dev_info->max_mac_addrs = MANA_MAX_MAC_ADDR;
 	dev_info->max_hash_mac_addrs = 0;
@@ -338,16 +338,20 @@ mana_dev_info_get(struct rte_eth_dev *dev,
 
 	/* Buffer limits */
 	dev_info->rx_desc_lim.nb_min = MIN_BUFFERS_PER_QUEUE;
-	dev_info->rx_desc_lim.nb_max = priv->max_rx_desc;
+	dev_info->rx_desc_lim.nb_max = RTE_MIN(priv->max_rx_desc, UINT16_MAX);
 	dev_info->rx_desc_lim.nb_align = MIN_BUFFERS_PER_QUEUE;
-	dev_info->rx_desc_lim.nb_seg_max = priv->max_recv_sge;
-	dev_info->rx_desc_lim.nb_mtu_seg_max = priv->max_recv_sge;
+	dev_info->rx_desc_lim.nb_seg_max =
+		RTE_MIN(priv->max_recv_sge, UINT16_MAX);
+	dev_info->rx_desc_lim.nb_mtu_seg_max =
+		RTE_MIN(priv->max_recv_sge, UINT16_MAX);
 
 	dev_info->tx_desc_lim.nb_min = MIN_BUFFERS_PER_QUEUE;
-	dev_info->tx_desc_lim.nb_max = priv->max_tx_desc;
+	dev_info->tx_desc_lim.nb_max = RTE_MIN(priv->max_tx_desc, UINT16_MAX);
 	dev_info->tx_desc_lim.nb_align = MIN_BUFFERS_PER_QUEUE;
-	dev_info->tx_desc_lim.nb_seg_max = priv->max_send_sge;
-	dev_info->rx_desc_lim.nb_mtu_seg_max = priv->max_recv_sge;
+	dev_info->tx_desc_lim.nb_seg_max =
+		RTE_MIN(priv->max_send_sge, UINT16_MAX);
+	dev_info->tx_desc_lim.nb_mtu_seg_max =
+		RTE_MIN(priv->max_send_sge, UINT16_MAX);
 
 	/* Speed */
 	dev_info->speed_capa = RTE_ETH_LINK_SPEED_100G;
@@ -1385,9 +1389,9 @@ mana_probe_port(struct ibv_device *ibdev, struct ibv_device_attr_ex *dev_attr,
 	priv->max_mr = dev_attr->orig_attr.max_mr;
 	priv->max_mr_size = dev_attr->orig_attr.max_mr_size;
 
-	DRV_LOG(INFO, "dev %s max queues %d desc %d sge %d",
+	DRV_LOG(INFO, "dev %s max queues %d desc %d sge %d mr %lu",
 		name, priv->max_rx_queues, priv->max_rx_desc,
-		priv->max_send_sge);
+		priv->max_send_sge, priv->max_mr_size);
 
 	rte_eth_copy_pci_info(eth_dev, pci_dev);
 
-- 
2.25.1