diff --git a/debug/accuracy_tools/msprobe/ccsrc/if/mindspore/MindSporeDbgHook.cpp b/debug/accuracy_tools/msprobe/ccsrc/if/mindspore/MindSporeDbgHook.cpp
index 42f3a2e5b61d5da021b2ef7da4a7b88c6dc2abbb..db279a33f17311a7c3681e7d899c2fa85a6fdcc8 100644
--- a/debug/accuracy_tools/msprobe/ccsrc/if/mindspore/MindSporeDbgHook.cpp
+++ b/debug/accuracy_tools/msprobe/ccsrc/if/mindspore/MindSporeDbgHook.cpp
@@ -34,6 +34,9 @@ EXPORT_SYMBOL void MS_DbgOnStepBegin(uint32_t device, int32_t curStep,
         }
         /* mindspore使用了_GLIBCXX_USE_CXX11_ABI=0，为了解决CXX版本兼容问题，此处将string转char*使用 */
         if (ext.first == static_cast<uint32_t>(MindStudioDebugger::MindStudioExtensionArgs::ALL_KERNEL_NAMES)) {
+            if (ext.second == nullptr) {
+                continue;
+            }
             std::vector<std::string>* ss = reinterpret_cast<std::vector<std::string>*>(ext.second);
             strBuf = new const char*[(*ss).size() + 1];
             strBuf[(*ss).size()] = nullptr;