diff --git a/src/HDProtocolServer.c b/src/HDProtocolServer.c
index f06b02d..62ea52b 100644
--- a/src/HDProtocolServer.c
+++ b/src/HDProtocolServer.c
@@ -38,7 +38,7 @@ static uint8_t IsOccupied(uint8_t currIndex, uint8_t protocol, uint8_t *occupied
 {
     if (currIndex >= OCCUPIED_MAX) {
         LogE("index[%d] out of range[%d]", currIndex, OCCUPIED_MAX);
-        return 0;
+        return 1;
     }
 
     for (int i = 0; i < OCCUPIED_MAX; ++i) {
@@ -331,6 +331,11 @@ void HDProtocolRun()
         // 有之前的数据已经占用了, 并且检查是否超时
         uint8_t occupiedIndex = OCCUPIED_MAX;
         if (IsOccupied(i, sInfo.info[i].supportProtocol, &occupiedIndex)) {
+            // 异常情况
+            if (occupiedIndex >= OCCUPIED_MAX) {
+                continue;
+            }
+
             // 解析被占用, 检查超时
             if (HDLogGetTime() - sOccupiedInfo[occupiedIndex].occupyTime <= HDPROTOCOL_OCCUPY_TIMEOUT) {
                 continue;