Messages in this thread Patch in this message | | | From | Huazhong Tan <> | Subject | [PATCH net-next 9/9] net: hns3: set maximum length to resp_data_len for exceptional case | Date | Thu, 4 Jul 2019 22:04:28 +0800 |
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From: Peng Li <lipeng321@huawei.com>
If HCLGE_MBX_MAX_RESP_DATA_SIZE > HCLGE_MBX_MAX_RESP_DATA_SIZE, the memcpy will cause out of memory. So this patch just set resp_data_len to the maximum length for this case.
Signed-off-by: Peng Li <lipeng321@huawei.com> Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com> --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c index 9adeba9..a38ac7c 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c @@ -29,6 +29,10 @@ static int hclge_gen_resp_to_vf(struct hclge_vport *vport, "PF fail to gen resp to VF len %d exceeds max len %d\n", resp_data_len, HCLGE_MBX_MAX_RESP_DATA_SIZE); + /* If resp_data_len is too long, set the value to max length + * and return the msg to VF + */ + resp_data_len = HCLGE_MBX_MAX_RESP_DATA_SIZE; } hclge_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_PF_TO_VF, false); -- 2.7.4
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