diff --git a/interfaces/inner_api/syscap_interface.c b/interfaces/inner_api/syscap_interface.c
index c85b66a..bde4401 100644
--- a/interfaces/inner_api/syscap_interface.c
+++ b/interfaces/inner_api/syscap_interface.c
@@ -242,6 +242,11 @@ bool DecodePrivateSyscap(char *input, char (**output)[SINGLE_SYSCAP_LEN], int *o
 
     *output = outputArray;
     inputPos = input;
+
+    if (inputPos == NULL) {
+        return false;
+    }
+
     char buffer[SINGLE_FEAT_LEN] = {0};
     char *bufferPos = buffer;
     while (*inputPos != '\0') {