output-json: fix Coverity USE_AFTER_FREE

Return error if plugin open fails. Fixes Coverity CID 1465664
USE_AFTER_FREE error.

Redmine issue:
https://redmine.openinfosecfoundation.org/issues/3864

diff --git a/src/output-json.c b/src/output-json.c
index 83538777559dafd4c5842e458b959145b5554eff..7e55ba0385a541fdddd9ad5130dcb186c5766b9a 100644 (file)
--- a/src/output-json.c
+++ b/src/output-json.c
@@ -1198,6 +1198,7 @@ OutputInitResult OutputJsonInitCtx(ConfNode *conf)
                 LogFileFreeCtx(json_ctx->file_ctx);
                 SCFree(json_ctx);
                 SCFree(output_ctx);
+                return result;
             } else {
                 json_ctx->file_ctx->plugin = json_ctx->plugin;
                 json_ctx->file_ctx->plugin_data = plugin_data;