[SCSI] ibmvfc: Sanitize response lengths

Sanitize the response lengths in order to prevent possible oopses
in the command response path.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 58f8c9e39ae8..6ecc0ddd4440 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -1457,8 +1457,8 @@ static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
         struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
         struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
         struct scsi_cmnd *cmnd = evt->cmnd;
-        int rsp_len = 0;
-        int sense_len = rsp->fcp_sense_len;
+        u32 rsp_len = 0;
+        u32 sense_len = rsp->fcp_sense_len;
 
         if (cmnd) {
                 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
@@ -1475,7 +1475,7 @@ static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
                                 rsp_len = rsp->fcp_rsp_len;
                         if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
                                 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
-                        if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len)
+                        if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
                                 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
 
                         ibmvfc_log_error(evt);