smtp: clean up thread local memory

src/detect-engine.c

@@ -1678,6 +1678,17 @@ void DetectEngineThreadCtxFree(DetectEngineThreadCtx *det_ctx)
         SCFree(det_ctx->hcbd);
     }
 
+    /* SMTP */
+    if (det_ctx->smtp != NULL) {
+        SCLogDebug("det_ctx smtp %u", det_ctx->smtp_buffers_size);
+        for (i = 0; i < det_ctx->smtp_buffers_size; i++) {
+            if (det_ctx->smtp[i].buffer != NULL)
+                SCFree(det_ctx->smtp[i].buffer);
+            SCLogDebug("det_ctx->smtp[i].buffer_size %u", det_ctx->smtp[i].buffer_size);
+        }
+        SCFree(det_ctx->smtp);
+    }
+
     /* Decoded base64 data. */
     if (det_ctx->base64_decoded != NULL) {
         SCFree(det_ctx->base64_decoded);