diff options
| -rw-r--r-- | hw/virtio/virtio.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index a00380fae6..82b6060b2a 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -131,6 +131,7 @@ static void virtio_init_region_cache(VirtIODevice *vdev, int n) VRingMemoryRegionCaches *new; hwaddr addr, size; int event_size; + int64_t len; event_size = virtio_vdev_has_feature(vq->vdev, VIRTIO_RING_F_EVENT_IDX) ? 2 : 0; @@ -140,21 +141,41 @@ static void virtio_init_region_cache(VirtIODevice *vdev, int n) } new = g_new0(VRingMemoryRegionCaches, 1); size = virtio_queue_get_desc_size(vdev, n); - address_space_cache_init(&new->desc, vdev->dma_as, - addr, size, false); + len = address_space_cache_init(&new->desc, vdev->dma_as, + addr, size, false); + if (len < size) { + virtio_error(vdev, "Cannot map desc"); + goto err_desc; + } size = virtio_queue_get_used_size(vdev, n) + event_size; - address_space_cache_init(&new->used, vdev->dma_as, - vq->vring.used, size, true); + len = address_space_cache_init(&new->used, vdev->dma_as, + vq->vring.used, size, true); + if (len < size) { + virtio_error(vdev, "Cannot map used"); + goto err_used; + } size = virtio_queue_get_avail_size(vdev, n) + event_size; - address_space_cache_init(&new->avail, vdev->dma_as, - vq->vring.avail, size, false); + len = address_space_cache_init(&new->avail, vdev->dma_as, + vq->vring.avail, size, false); + if (len < size) { + virtio_error(vdev, "Cannot map avail"); + goto err_avail; + } atomic_rcu_set(&vq->vring.caches, new); if (old) { call_rcu(old, virtio_free_region_cache, rcu); } + return; + +err_avail: + address_space_cache_destroy(&new->used); +err_used: + address_space_cache_destroy(&new->desc); +err_desc: + g_free(new); } /* virt queue functions */ |