From e1779b4ff5412fcb7f943f6b49cac5e70fc724e2 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Fri, 25 Aug 2017 13:46:40 -0700
Subject: [PATCH] scsi: scsi_transport_sas: Check kzalloc() return value

Check whether memory allocation succeeded before dereferencing
the pointer to the allocated memory.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/scsi_transport_sas.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index 5006a656e16a..e2e948f1ce28 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -421,6 +421,9 @@ sas_tlr_supported(struct scsi_device *sdev)
 	char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 	int ret = 0;
 
+	if (!buffer)
+		goto out;
+
 	if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 		goto out;
 
-- 
2.20.1