From b57ed9bf075e33cdd2f9eb545ff555301dd57221 Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Tue, 26 Mar 2013 17:32:44 +0100 Subject: [PATCH] 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 Signed-off-by: Cornelia Huck --- hw/s390x/s390-virtio-ccw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index d4364143e..76b63e2ca 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -31,6 +31,9 @@ static int virtio_ccw_hcall_notify(const uint64_t *args) if (!sch || !css_subch_visible(sch)) { return -EINVAL; } + if (queue >= VIRTIO_PCI_QUEUE_MAX) { + return -EINVAL; + } virtio_queue_notify(virtio_ccw_get_vdev(sch), queue); return 0; -- 2.39.2