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scsi: aacraid: reading out of bounds

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"qd.id" comes directly from the copy_from_user() on the line before so
we should verify that it's within bounds.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dan Carpenter 2017-07-25 22:49:55 +03:00 committed by Martin K. Petersen
parent 722477c4f2
commit e6fd916a62
1 changed files with 4 additions and 3 deletions
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7
drivers/scsi/aacraid/aachba.c
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@ -3198,10 +3198,11 @@ static int query_disk(struct aac_dev *dev, void __user *arg)
return -EBUSY;
if (copy_from_user(&qd, arg, sizeof (struct aac_query_disk)))
return -EFAULT;
if (qd.cnum == -1)
if (qd.cnum == -1) {
if (qd.id < 0 || qd.id >= dev->maximum_num_containers)
return -EINVAL;
qd.cnum = qd.id;
else if ((qd.bus == -1) && (qd.id == -1) && (qd.lun == -1))
{
} else if ((qd.bus == -1) && (qd.id == -1) && (qd.lun == -1)) {
if (qd.cnum < 0 || qd.cnum >= dev->maximum_num_containers)
return -EINVAL;
qd.instance = dev->scsi_host_ptr->host_no;