diff --git a/components/common/src/volc_rtc.c b/components/common/src/volc_rtc.c
index 9db5bff..1c0520f 100644
--- a/components/common/src/volc_rtc.c
+++ b/components/common/src/volc_rtc.c
@@ -427,7 +427,10 @@ static void _on_global_error(byte_rtc_engine_t engine, int code, const char* mes
     rtc->b_channel_joined = false;
 
     rtc->b_first_keyframe_received = false;
-    LOGI("global error %d %s\n", code, message);
+    // 防御性判空: 火山 RTC SDK 在某些 ICE Agent 失败路径下会用 message=NULL 调用本回调,
+    //   导致 printf("%s", NULL) → strlen(NULL) → LoadProhibited panic → 设备重启
+    //   (idle ≥ 10 分钟后服务端 session 超时 / NAT 表过期等场景偶发触发)
+    LOGI("global error %d %s\n", code, message ? message : "(null)");
     LOGI("global error heap_free=%u", (unsigned)heap_caps_get_free_size(MALLOC_CAP_DEFAULT));
     msg_data.code = VOLC_MSG_DISCONNECTED;
     _send_message_2_user(rtc, &msg_data);