linux-kernel - [PATCH] scsi: qla2xxx: Fix off by one in qla_edif_app

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Date: Tue, 2 Apr 2024 12:56:54 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Quinn Tran <qutran@...vell.com>
Cc: Nilesh Javali <njavali@...vell.com>,
	GR-QLogic-Storage-Upstream@...vell.com,
	"James E.J. Bottomley" <jejb@...ux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Himanshu Madhani <himanshu.madhani@...cle.com>,
	Larry Wisneski <Larry.Wisneski@...vell.com>,
	Duane Grigsby <duane.grigsby@...vell.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH] scsi: qla2xxx: Fix off by one in qla_edif_app_getstats()

The app_reply->elem[] array is allocated earlier in this function and it
has app_req.num_ports elements.  Thus this > comparison needs to be >=
to prevent memory corruption.

Fixes: 7878f22a2e03 ("scsi: qla2xxx: edif: Add getfcinfo and statistic bsgs")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/scsi/qla2xxx/qla_edif.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/qla2xxx/qla_edif.c b/drivers/scsi/qla2xxx/qla_edif.c
index 26e6b3e3af43..dcde55c8ee5d 100644
--- a/drivers/scsi/qla2xxx/qla_edif.c
+++ b/drivers/scsi/qla2xxx/qla_edif.c
@@ -1100,7 +1100,7 @@ qla_edif_app_getstats(scsi_qla_host_t *vha, struct bsg_job *bsg_job)
 
 		list_for_each_entry_safe(fcport, tf, &vha->vp_fcports, list) {
 			if (fcport->edif.enable) {
-				if (pcnt > app_req.num_ports)
+				if (pcnt >= app_req.num_ports)
 					break;
 
 				app_reply->elem[pcnt].rekey_count =
-- 
2.43.0