[PATCH net-next 1/3] net: hns3: set msg->desc to NULL after kfree in hclge_query_reg_info()

[Jijie Shao]

From: Jian Shen <shenjian15@xxxxxxxxxx>

In hclge_query_reg_info(), msg->desc is freed by kfree(), but the
caller continues to use msg across loop iterations. Set msg->desc
to NULL to avoid leaving a dangling pointer in the reused struct.

Signed-off-by: Jian Shen <shenjian15@xxxxxxxxxx>
Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
index dac051e798da..7e124e2c718d 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
@@ -1592,6 +1592,7 @@ hclge_query_reg_info(struct hclge_dev *hdev,
 	}
 
 	kfree(msg->desc);
+	msg->desc = NULL;
 }
 
 static void hclge_query_reg_info_of_ssu(struct hclge_dev *hdev)
-- 
2.43.0