From f1361d482b30dc651485b3ae0665a33148602786 Mon Sep 17 00:00:00 2001
From: liwei3013 <liwei3013@126.com>
Date: Wed, 24 Feb 2021 14:00:10 +0800
Subject: [PATCH 6/7] fix issues about double create/destory

Signed-off-by: liwei3013 <liwei3013@126.com>
---
 src/host_src/enclave.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/src/host_src/enclave.c b/src/host_src/enclave.c
index 14f6aae..e3020d3 100644
--- a/src/host_src/enclave.c
+++ b/src/host_src/enclave.c
@@ -67,7 +67,6 @@ static void error_handle(cc_enclave_t **l_context, void *handle, p_tee_registere
     if (path) {
         free(path);
     }
-    path = NULL;
 
     if (*l_context) {
         free(*l_context);
@@ -110,8 +109,14 @@ done:
 static bool check_flag(cc_enclave_result_t *res, const char *path, uint32_t flags, const enclave_features_t *features,
     const uint32_t features_count, cc_enclave_t **enclave)
 {
-    if (!path || !enclave || (features_count > 0 && features == NULL) 
-	       || (features_count == 0 &&  features != NULL) || (flags & SECGEAR_RESERVED_FLAG)) {
+    if (enclave == NULL || *enclave != NULL) {
+        *res = CC_ERROR_BAD_PARAMETERS;
+        print_error_term("Input context should not be NULL or context pointer should be set to NULL\n");
+        return false;
+    }
+
+    if (!path || (features_count > 0 && features == NULL) || (features_count == 0 &&  features != NULL) 
+    || (flags & SECGEAR_RESERVED_FLAG)) {
         *res = CC_ERROR_BAD_PARAMETERS;
         print_error_term("Parameter error\n");
         return false;
@@ -194,8 +199,12 @@ cc_enclave_result_t cc_enclave_create(const char *path, enclave_type_t type, uin
     }
     SECGEAR_CHECK_RES_NO_LOG(res);
 
-    if (!check_flag(&res, path, flags, features, features_count, enclave) || !check_transform_path(&res, path, &l_path)
-    || !chose_engine_type(&res, type, version, &type_version)|| !allocate_context_memory(&res, &l_context)) {
+    if (!check_flag(&res, path, flags, features, features_count, enclave)) {
+        return res;
+    }
+
+    if (!check_transform_path(&res, path, &l_path) || !chose_engine_type(&res, type, version, &type_version)
+    || !allocate_context_memory(&res, &l_context)) {
         goto done;
     }
 
@@ -267,7 +276,8 @@ cc_enclave_result_t cc_enclave_destroy(cc_enclave_t *context)
 
     /* check context and enclave engine context */
     if (!context || !context->list_ops_node) {
-        print_error_goto("Function context parameter error\n");
+        print_error_term("Function context parameter error\n");
+        return CC_ERROR_BAD_PARAMETERS;
     }
 
     if (context->list_ops_node->ops_desc->ops->cc_destroy_enclave != NULL) {
@@ -294,6 +304,7 @@ cc_enclave_result_t cc_enclave_destroy(cc_enclave_t *context)
             pthread_mutex_unlock(&(g_list_ops.mutex_work));
             print_error_goto("Close engine failure\n");
         }
+        context->list_ops_node = NULL;
     }
     /* free enclave number resources */
     g_list_ops.enclaveState.enclave_count--;
@@ -308,6 +319,5 @@ done:
     if (context) {
         free(context);
     }
-    context = NULL;
     return res;
 }
-- 
2.27.0