[SCSI] hptiop: avoid buffer overflow when returning sense data

The newer firmware may return more than 96 bytes of sense data when it
does autosense.  Truncate this to the size of the SCSI layer sense
buffer to avoid an overrun.

Signed-off-by: HighPoint Linux Team <linux@highpoint-tech.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/hptiop.c b/drivers/scsi/hptiop.c
index 8515054..0844331 100644 (file)
--- a/drivers/scsi/hptiop.c
+++ b/drivers/scsi/hptiop.c
@@ -375,8 +375,9 @@ static void hptiop_host_request_callback(struct hptiop_hba *hba, u32 _tag)
                scp->result = SAM_STAT_CHECK_CONDITION;
                memset(&scp->sense_buffer,
                                0, sizeof(scp->sense_buffer));
-               memcpy(&scp->sense_buffer,
-                       &req->sg_list, le32_to_cpu(req->dataxfer_length));
+               memcpy(&scp->sense_buffer, &req->sg_list,
+                               min(sizeof(scp->sense_buffer),
+                                       le32_to_cpu(req->dataxfer_length)));
                break;
 
        default: