diff --git a/interfaces/inner_kits/native_cpp/src/device_manager_impl.cpp b/interfaces/inner_kits/native_cpp/src/device_manager_impl.cpp
index 31107e981e814871f5c8240f6b66c397d7e4ae47..87a6c77e7aca126b1bf74ab4b6e6f4c5dd8b128c 100644
--- a/interfaces/inner_kits/native_cpp/src/device_manager_impl.cpp
+++ b/interfaces/inner_kits/native_cpp/src/device_manager_impl.cpp
@@ -70,6 +70,11 @@ bool DeviceManagerImpl::isSystemAppCalling(void)
 
     LOGI("get bundle manager proxy success.");
     sptr<IBundleMgr> iBundleMgr = iface_cast<IBundleMgr>(remoteObject);
+    if (iBundleMgr == nullptr) {
+        LOGI("iBundleMgr is nullptr, caller may be a process");
+        return true;
+    }
+
     return iBundleMgr->CheckIsSystemAppByUid(uid);
 }