diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 59edb5a1ffe2..821aba60eac2 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1428,6 +1428,8 @@ static long vhost_set_memory(struct vhost_dev *d, struct vhost_memory __user *m)
 		return -EFAULT;
 	if (mem.padding)
 		return -EOPNOTSUPP;
+	if (mem.nregions == 0)
+		return 0;
 	if (mem.nregions > max_mem_regions)
 		return -E2BIG;
 	newmem = kvzalloc(struct_size(newmem, regions, mem.nregions),