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

Bart Van Assche
2017-08-23T21:43:33Z

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

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
---
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