linux-kernel - [PATCH 4.4 051/192] [PATCH 052/135] lpfc: Fix driver crash when module parameter lpfc_fcp_io

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Message-Id: <20160912152201.083776782@linuxfoundation.org>
Date:   Mon, 12 Sep 2016 18:59:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dick Kennedy <dick.kennedy@...gotech.com>,
        James Smart <james.smart@...gotech.com>,
        Hannes Reinicke <hare@...e.de>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.4 051/192] [PATCH 052/135] lpfc: Fix driver crash when module parameter lpfc_fcp_io_channel set to 16

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

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

[ Upstream commit 6690e0d4fc5cccf74534abe0c9f9a69032bc02f0 ]

Fix driver crash when module parameter lpfc_fcp_io_channel set to 16

Signed-off-by: Dick Kennedy <dick.kennedy@...gotech.com>
Signed-off-by: James Smart <james.smart@...gotech.com>
Reviewed-by: Hannes Reinicke <hare@...e.de>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/lpfc/lpfc_init.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -8834,9 +8834,12 @@ found:
 				 * already mapped to this phys_id.
 				 */
 				if (cpup->irq != LPFC_VECTOR_MAP_EMPTY) {
-					chann[saved_chann] =
-						cpup->channel_id;
-					saved_chann++;
+					if (saved_chann <=
+					    LPFC_FCP_IO_CHAN_MAX) {
+						chann[saved_chann] =
+							cpup->channel_id;
+						saved_chann++;
+					}
 					goto out;
 				}