fix memory leak

Signed-off-by: NWangFengTu <wangfengtu@huawei.com>

src/image/oci/oci_common_operators.c

@@ -234,6 +234,9 @@ int oci_split_image_name(const char *image_name, char **host, char **name, char
         }
     }
 
+    free(tmp_image_name);
+    tmp_image_name = NULL;
+
     return 0;
 }
 

src/image/oci/registry/registry.c

@@ -436,8 +436,12 @@ static int set_cached_info_to_desc(thread_fetch_info *infos, size_t infos_len, p
                 return -1;
             }
 
-            desc->layers[i].diff_id = util_strdup_s(cache->diffid);
-            desc->layers[i].file = util_strdup_s(infos[i].file);
+            if (desc->layers[i].diff_id == NULL) {
+                desc->layers[i].diff_id = util_strdup_s(cache->diffid);
+            }
+            if (desc->layers[i].file == NULL) {
+                desc->layers[i].file = util_strdup_s(infos[i].file);
+            }
         }
     }
 
@@ -1639,6 +1643,7 @@ out:
         }
     }
     free_pull_desc(desc);
+    desc = NULL;
 
     return ret;
 }
@@ -1780,6 +1785,8 @@ void free_registry_pull_options(registry_pull_options *options)
     free_registry_auth(&options->auth);
     free(options->image_name);
     options->image_name = NULL;
+    free(options->dest_image_name);
+    options->dest_image_name = NULL;
     free(options);
     return;
 }
@@ -1908,5 +1915,8 @@ void free_pull_desc(pull_descriptor *desc)
     free(desc->layers);
     desc->layers = NULL;
     desc->layers_len = 0;
+
+    free(desc);
+
     return;
 }

src/image/oci/registry/registry_apiv2.c

@@ -117,7 +117,8 @@ static int parse_challenges(pull_descriptor *desc, char *schema, char *params)
         // schema == NULL means this challenge have not be used.
         if (desc->challenges[i].schema == NULL) {
             desc->challenges[i] = c;
-            return 0;
+            ret = 0;
+            goto out;
         }
     }
 
@@ -133,7 +134,7 @@ out:
     util_free_array(kv);
     kv = NULL;
 
-    return -1;
+    return ret;
 }
 
 static int parse_auth(pull_descriptor *desc, char *auth)

src/sha256/sha256.c

@@ -368,6 +368,9 @@ out:
         fclose((FILE*)stream);
     }
 
+    free(buffer);
+    buffer = NULL;
+
     if (ret == 0) {
         return util_strdup_s(output_buffer);
     } else {