[PATCH 3.18 26/42] scsi: sg: off by one in sg_ioctl()

[Greg Kroah-Hartman]

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit bd46fc406b30d1db1aff8dabaff8d18bb423fdcf upstream.

If "val" is SG_MAX_QUEUE then we are one element beyond the end of the
"rinfo" array so the > should be >=.

Fixes: 109bade9c625 ("scsi: sg: use standard lists for sg_requests")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/scsi/sg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1056,7 +1056,7 @@ sg_ioctl(struct file *filp, unsigned int
 			read_lock_irqsave(&sfp->rq_list_lock, iflags);
 			val = 0;
 			list_for_each_entry(srp, &sfp->rq_list, entry) {
-				if (val > SG_MAX_QUEUE)
+				if (val >= SG_MAX_QUEUE)
 					break;
 				memset(&rinfo[val], 0, SZ_SG_REQ_INFO);
 				rinfo[val].req_state = srp->done + 1;