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scsi: ses: check return code from ses_recv_diag() 

We should be checking the return code from ses_recv_diag() to avoid
accessing invalid data.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2017-08-15 10:21:41 +02:00 committed by Martin K. Petersen
parent c8cd71f1f3
commit acf8ab9a85
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/ses.c
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@ -179,7 +179,8 @@ static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
unsigned char *type_ptr = ses_dev->page1_types;
unsigned char *desc_ptr = ses_dev->page2 + 8;
ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
if (ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len) < 0)
return NULL;
for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
for (j = 0; j < type_ptr[1]; j++) {