[PATCH v3 2/7] ufs: ufs_bsg: Remove unnecessary length checkup

Bean Huo
2022-12-01T14:05:16Z

Remove checks on job->request_len and job->reply_len because
The following msgcode checks will rule out malicious requests.

Signed-off-by: Bean Huo <beanhuo@micron.com>
Acked-by: Avri Altman <avri.altman@wdc.com>
---
drivers/ufs/core/ufs_bsg.c | 21 ---------------------
1 file changed, 21 deletions(-)

diff --git a/drivers/ufs/core/ufs_bsg.c b/drivers/ufs/core/ufs_bsg.c
index b99e3f3dc4ef..9ac8204f1ee6 100644
--- a/drivers/ufs/core/ufs_bsg.c
+++ b/drivers/ufs/core/ufs_bsg.c
@@ -30,21 +30,6 @@ static int ufs_bsg_get_query_desc_size(struct ufs_hba *hba, int *desc_len,
return 0;
}

-static int ufs_bsg_verify_query_size(struct ufs_hba *hba,
- unsigned int request_len,
- unsigned int reply_len)
-{
- int min_req_len = sizeof(struct ufs_bsg_request);
- int min_rsp_len = sizeof(struct ufs_bsg_reply);
-
- if (min_req_len > request_len || min_rsp_len > reply_len) {
- dev_err(hba->dev, "not enough space assigned\n");
- return -EINVAL;
- }
-
- return 0;
-}
-
static int ufs_bsg_alloc_desc_buffer(struct ufs_hba *hba, struct bsg_job *job,
uint8_t **desc_buff, int *desc_len,
enum query_opcode desc_op)
@@ -88,8 +73,6 @@ static int ufs_bsg_request(struct bsg_job *job)
struct ufs_bsg_request *bsg_request = job->request;
struct ufs_bsg_reply *bsg_reply = job->reply;
struct ufs_hba *hba = shost_priv(dev_to_shost(job->dev->parent));
- unsigned int req_len = job->request_len;
- unsigned int reply_len = job->reply_len;
struct uic_command uc = {};
int msgcode;
uint8_t *desc_buff = NULL;
@@ -97,10 +80,6 @@ static int ufs_bsg_request(struct bsg_job *job)
enum query_opcode desc_op = UPIU_QUERY_OPCODE_NOP;
int ret;

- ret = ufs_bsg_verify_query_size(hba, req_len, reply_len);
- if (ret)
- goto out;
-
bsg_reply->reply_payload_rcv_len = 0;

ufshcd_rpm_get_sync(hba);
--
2.25.1