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net: hns3: set maximum length to resp_data_len for exceptional case

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Peng Li 2019-07-04 22:04:28 +08:00 committed by David S. Miller
parent b9a8f88373
commit 8929515246
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
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@ -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);