diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c
index b6c958224b7c..28a977248a0d 100644
--- a/drivers/vdpa/vdpa_user/iova_domain.c
+++ b/drivers/vdpa/vdpa_user/iova_domain.c
@@ -76,6 +76,10 @@ int vduse_domain_set_map(struct vduse_iova_domain *domain,
 	for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
 	     map = vhost_iotlb_itree_next(map, start, last)) {
 		map_file = (struct vdpa_map_file *)map->opaque;
+		if (!map_file || map_file->file == domain->file) {
+			ret = -EINVAL;
+			goto err;
+		}
 		ret = vduse_iotlb_add_range(domain, map->start, map->last,
 					    map->addr, map->perm,
 					    map_file->file,
@@ -226,6 +230,7 @@ vduse_domain_get_coherent_page(struct vduse_iova_domain *domain, u64 iova)
 {
 	u64 start = iova & PAGE_MASK;
 	u64 last = start + PAGE_SIZE - 1;
+	struct vdpa_map_file *map_file;
 	struct vhost_iotlb_map *map;
 	struct page *page = NULL;
 
@@ -234,6 +239,10 @@ vduse_domain_get_coherent_page(struct vduse_iova_domain *domain, u64 iova)
 	if (!map)
 		goto out;
 
+	map_file = (struct vdpa_map_file *)map->opaque;
+	if (!map_file || map_file->file != domain->file)
+		goto out;
+
 	page = pfn_to_page((map->addr + iova - map->start) >> PAGE_SHIFT);
 	get_page(page);
 out:
@@ -579,7 +588,7 @@ static int vduse_domain_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	struct vduse_iova_domain *domain = file->private_data;
 
-	vm_flags_set(vma, VM_DONTDUMP | VM_DONTEXPAND);
+	vm_flags_set(vma, VM_IO | VM_DONTDUMP | VM_DONTEXPAND);
 	vma->vm_private_data = domain;
 	vma->vm_ops = &vduse_domain_mmap_ops;