[Qemu-devel] [PATCH for-2.4 v3 3/3] vhost: fail backend intialization if memslots number is more than its supported limit

[Igor Mammedov <imammedo@redhat.com>]

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/virtio/vhost.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index bcbad48..48fbac1 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -985,6 +985,12 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
     hdev->started = false;
     hdev->memory_changed = false;
     memory_listener_register(&hdev->memory_listener, &address_space_memory);
+    if (!vhost_has_free_slot()) {
+        fprintf(stderr, "vhost backend memory slots limit is less"
+                " than current number of present memory slots\n");
+        vhost_dev_cleanup(hdev);
+        return -1;
+    }
     return 0;
 fail_vq:
     while (--i >= 0) {
-- 
1.8.3.1