[dpdk-dev] [PATCH 2/3] ethdev: fix miss input validation when access reg info

["Min Hu (Connor)" <humin29@huawei.com>]

From: Chengchang Tang <tangchengchang@huawei.com>

This patch adds validity check of input pointer in regs dump API.

Fixes: 7a3f27cbf59b ("ethdev: add access to specific device info")
Fixes: 936eda25e8da ("net/hns3: support dump register")
Cc: stable@dpdk.org

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 drivers/net/hns3/hns3_regs.c   | 5 -----
 lib/librte_ethdev/rte_ethdev.c | 2 ++
 lib/librte_ethdev/rte_ethdev.h | 1 +
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/hns3/hns3_regs.c b/drivers/net/hns3/hns3_regs.c
index 4022bb9..f23e5c2 100644
--- a/drivers/net/hns3/hns3_regs.c
+++ b/drivers/net/hns3/hns3_regs.c
@@ -484,11 +484,6 @@ hns3_get_regs(struct rte_eth_dev *eth_dev, struct rte_dev_reg_info *regs)
 	uint32_t *data;
 	int ret;
 
-	if (regs == NULL) {
-		hns3_err(hw, "the input parameter regs is NULL!");
-		return -EINVAL;
-	}
-
 	ret = hns3_get_regs_length(hw, &length);
 	if (ret)
 		return ret;
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index bb195ab..3fe200d 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -5286,6 +5286,8 @@ rte_eth_dev_get_reg_info(uint16_t port_id, struct rte_dev_reg_info *info)
 	struct rte_eth_dev *dev;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+	if (info == NULL)
+		return -EINVAL;
 
 	dev = &rte_eth_devices[port_id];
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->get_reg, -ENOTSUP);
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 78677a5..5747307 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -4397,6 +4397,7 @@ int rte_eth_get_monitor_addr(uint16_t port_id, uint16_t queue_id,
  * @return
  *   - (0) if successful.
  *   - (-ENOTSUP) if hardware doesn't support.
+ *   - (-EINVAL) if bad parameter.
  *   - (-ENODEV) if *port_id* invalid.
  *   - (-EIO) if device is removed.
  *   - others depends on the specific operations implementation.
-- 
2.7.4