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virtio-ccw: Queue sanity check for notify hypercall. 

Verify that the virtio-ccw notify hypercall passed a reasonable
value for queue.

Cc: qemu-stable@nongnu.org
Reported-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Cornelia Huck 2013-03-26 17:32:44 +01:00
parent e769bdc26d
commit b57ed9bf07
1 changed files with 3 additions and 0 deletions
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3
hw/s390x/s390-virtio-ccw.c
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@ -31,6 +31,9 @@ static int virtio_ccw_hcall_notify(const uint64_t *args)
if (!sch || !css_subch_visible(sch)) { if (!sch || !css_subch_visible(sch)) {
return -EINVAL; return -EINVAL;
} }
if (queue >= VIRTIO_PCI_QUEUE_MAX) {
return -EINVAL;
}
virtio_queue_notify(virtio_ccw_get_vdev(sch), queue); virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
return 0; return 0;