diff --git a/deps/oblib/src/lib/alloc/ob_tenant_ctx_allocator.cpp b/deps/oblib/src/lib/alloc/ob_tenant_ctx_allocator.cpp
index 8517962210..5bacefc84d 100644
--- a/deps/oblib/src/lib/alloc/ob_tenant_ctx_allocator.cpp
+++ b/deps/oblib/src/lib/alloc/ob_tenant_ctx_allocator.cpp
@@ -452,7 +452,9 @@ void ObTenantCtxAllocator::on_free(AObject &obj)
 
   int64_t tenant_id = blk_mgr->get_tenant_id();
   int64_t ctx_id = blk_mgr->get_ctx_id();
-  ObMemAttr attr(tenant_id, obj.label_, ctx_id);
+  char label[lib::AOBJECT_LABEL_SIZE + 1];
+  MEMCPY(label, obj.label_, sizeof(label));
+  ObMemAttr attr(tenant_id, label, ctx_id);
   if (OB_NOT_NULL(malloc_callback)) {
     const int64_t size = obj.alloc_bytes_;
     (*malloc_callback)(attr, -size);