[PATCH 16/19] scsi_transport_sas, sas_tlr_supported(): Check kzalloc() return value

[Bart Van Assche <bart.vanassche@xxxxxxx>]

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

Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Johannes Thumshirn <jthumshirn@xxxxxxx>
---
 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 a318c46db7cc..1a0fa79fd49a 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -423,6 +423,9 @@ 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;
 
-- 
2.14.0