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net: hns3: add validity check for message data length

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[ Upstream commit 7d413735cb ]

Add validity check for message data length in function
hclge_send_mbx_msg(), avoid unexpected overflow.

Fixes: dde1a86e93 ("net: hns3: Add mailbox support to PF driver")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jian Shen 2022-04-24 20:57:24 +08:00 committed by Greg Kroah-Hartman
parent e3ec78d82d
commit 929c30c02d
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
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@ -91,6 +91,13 @@ static int hclge_send_mbx_msg(struct hclge_vport *vport, u8 *msg, u16 msg_len,
enum hclge_cmd_status status; enum hclge_cmd_status status;
struct hclge_desc desc; struct hclge_desc desc;
if (msg_len > HCLGE_MBX_MAX_MSG_SIZE) {
dev_err(&hdev->pdev->dev,
"msg data length(=%u) exceeds maximum(=%u)\n",
msg_len, HCLGE_MBX_MAX_MSG_SIZE);
return -EMSGSIZE;
}
resp_pf_to_vf = (struct hclge_mbx_pf_to_vf_cmd *)desc.data; resp_pf_to_vf = (struct hclge_mbx_pf_to_vf_cmd *)desc.data;
hclge_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_PF_TO_VF, false); hclge_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_PF_TO_VF, false);