diff options
| -rw-r--r-- | hw/virtio.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/hw/virtio.c b/hw/virtio.c index 31bd9e32d..1ad857336 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -336,6 +336,11 @@ int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes) max = vring_desc_len(desc_pa, i) / sizeof(VRingDesc); num_bufs = i = 0; desc_pa = vring_desc_addr(desc_pa, i); + + if (max > VIRTQUEUE_MAX_SIZE) { + error_report("Too-large indirect descriptor"); + exit(1); + } } do { @@ -406,6 +411,11 @@ int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem) max = vring_desc_len(desc_pa, i) / sizeof(VRingDesc); desc_pa = vring_desc_addr(desc_pa, i); i = 0; + + if (max > VIRTQUEUE_MAX_SIZE) { + error_report("Too-large indirect descriptor"); + exit(1); + } } /* Collect all the descriptors */ |