[PATCH net 4/5] net: hns3: void array out of bound when loop tnl_num
From: Jijie Shao <shaojijie@huawei.com>
Date: 2024-08-13 14:16:47
Also in:
lkml
Subsystem:
hisilicon network subsystem 3 driver (hns3), hisilicon network subsystem driver, networking drivers, the rest · Maintainers:
Jian Shen, Jijie Shao, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Peiyang Wang <redacted> When query reg inf of SSU, it loops tnl_num times. However, tnl_num comes from hardware and the length of array is a fixed value. To void array out of bound, make sure the loop time is not greater than the length of array Signed-off-by: Peiyang Wang <redacted> Signed-off-by: Jijie Shao <shaojijie@huawei.com> --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
index e132c2f09560..cc7f46c0b35f 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c@@ -1598,8 +1598,7 @@ static void hclge_query_reg_info_of_ssu(struct hclge_dev *hdev) { u32 loop_para[HCLGE_MOD_MSG_PARA_ARRAY_MAX_SIZE] = {0}; struct hclge_mod_reg_common_msg msg; - u8 i, j, num; - u32 loop_time; + u8 i, j, num, loop_time; num = ARRAY_SIZE(hclge_ssu_reg_common_msg); for (i = 0; i < num; i++) {
@@ -1609,7 +1608,8 @@ static void hclge_query_reg_info_of_ssu(struct hclge_dev *hdev) loop_time = 1; loop_para[0] = 0; if (msg.need_para) { - loop_time = hdev->ae_dev->dev_specs.tnl_num; + loop_time = min(hdev->ae_dev->dev_specs.tnl_num, + HCLGE_MOD_MSG_PARA_ARRAY_MAX_SIZE); for (j = 0; j < loop_time; j++) loop_para[j] = j + 1; }
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2.33.0