From: Don Brace <don.brace@microsemi.com>
Date: Mon, 20 Jul 2020 16:52:51 -0500
Subject: scsi: hpsa: Correct rare oob condition
Patch-mainline: v5.9-rc1
Git-commit: 27e1b94dc9af605a9a611a75ab88f773e9dc6f88
References: jsc#SLE-15150

There are some rare conditions where a spare is first in the device list
causing an array out-of-bounds condition.

Link: https://lore.kernel.org/r/159528197176.24772.14659026352708896249.stgit@brunhilda
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Martin Wilck <mwilck@suse.com>
---
 drivers/scsi/hpsa.c |   20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3444,9 +3444,14 @@ static void hpsa_get_enclosure_info(stru
 	struct ErrorInfo *ei = NULL;
 	struct bmic_sense_storage_box_params *bssbp = NULL;
 	struct bmic_identify_physical_device *id_phys = NULL;
-	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
+	struct ext_report_lun_entry *rle;
 	u16 bmic_device_index = 0;
 
+	if (rle_index < 0 || rle_index >= HPSA_MAX_PHYS_LUN)
+		return;
+
+	rle = &rlep->LUN[rle_index];
+
 	encl_dev->eli =
 		hpsa_get_enclosure_logical_identifier(h, scsi3addr);
 
@@ -4175,6 +4180,9 @@ static void hpsa_get_ioaccel_drive_info(
 	int rc;
 	struct ext_report_lun_entry *rle;
 
+	if (rle_index < 0 || rle_index >= HPSA_MAX_PHYS_LUN)
+		return;
+
 	rle = &rlep->LUN[rle_index];
 
 	dev->ioaccel_handle = rle->ioaccel_handle;
@@ -4199,7 +4207,12 @@ static void hpsa_get_path_info(struct hp
 	struct ReportExtendedLUNdata *rlep, int rle_index,
 	struct bmic_identify_physical_device *id_phys)
 {
-	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
+	struct ext_report_lun_entry *rle;
+
+	if (rle_index < 0 || rle_index >= HPSA_MAX_PHYS_LUN)
+		return;
+
+	rle = &rlep->LUN[rle_index];
 
 	if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
 		this_device->hba_ioaccel_enabled = 1;
@@ -4421,7 +4434,8 @@ static void hpsa_update_scsi_devices(str
 		/*
 		 * Skip over some devices such as a spare.
 		 */
-		if (!tmpdevice->external && physical_device) {
+		if (phys_dev_index >= 0 && !tmpdevice->external &&
+			physical_device) {
 			skip_device = hpsa_skip_device(h, lunaddrbytes,
 					&physdev_list->LUN[phys_dev_index]);
 			if (skip_device)