diff --git a/src/create_pcid.c b/src/create_pcid.c
index c2aa7e7406ded7ee33206db77a16268275bdb2f7..36f0f20e4d1d80ce289f15ad93df7b4557d22396 100644
--- a/src/create_pcid.c
+++ b/src/create_pcid.c
@@ -359,7 +359,7 @@ static int32_t GetPriSyscapResult(cJSON *capVectorPtr, int32_t ret)
     return ret;
 }
 
-int32_t GetPriSyscap(PCIDMain *pcidMain, cJSON *sysCapObject, size_t contextBufLen)
+static int32_t GetPriSyscap(PCIDMain *pcidMain, cJSON *sysCapObject, int32_t contextBufLen)
 {
     cJSON *capVectorPtr = cJSON_CreateArray();
     if (capVectorPtr == NULL) {
@@ -367,12 +367,7 @@ int32_t GetPriSyscap(PCIDMain *pcidMain, cJSON *sysCapObject, size_t contextBufL
         return -1;
     }
 
-    if (contextBufLen > UINT32_MAX) {
-        PRINT_ERR("the data privateSyscapLen is out of scope.");
-        return GetPriSyscapResult(capVectorPtr, -1);
-    }
-
-    int32_t privateSyscapLen = (int32_t)(contextBufLen - sizeof(PCIDMain) - 1);
+    int32_t privateSyscapLen = contextBufLen - sizeof(PCIDMain) - 1;
     if (privateSyscapLen < 0 || privateSyscapLen > INT32_MAX) {
         PRINT_ERR("parse private syscap failed.");
         return GetPriSyscapResult(capVectorPtr, -1);
@@ -527,6 +522,8 @@ int32_t DecodePCID(char *inputFile, char *outDirPath)
         return FreeAfterDecodePCID(freePcidJsonInfo, FREE_DECODE_PCID_ROOT_OUT, ret);
     }
 
+    freePcidJsonInfo.sysCapObj = NULL; // avoid being released repeatedly.
+
     freePcidJsonInfo.strJson = cJSON_Print(freePcidJsonInfo.jsonRootObj);
 
     const char outputFileName[] = "pcid.json";