From 205bc1e2884b28dc9b016f116f5c54e0d569eb5d Mon Sep 17 00:00:00 2001
From: Victor Julien <vjulien@oisf.net>
Date: Wed, 13 Apr 2022 14:00:37 +0200
Subject: [PATCH] app-layer: disable stream app tracking on no parser

If protocol has no parser enabled or implemented, disable the app
progress tracking in the stream engine to reduce the workload in
the stream engine.
---
 src/app-layer-parser.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/app-layer-parser.c b/src/app-layer-parser.c
index 97172b7046..43accd7217 100644
--- a/src/app-layer-parser.c
+++ b/src/app-layer-parser.c
@@ -1259,8 +1259,12 @@ int AppLayerParserParse(ThreadVars *tv, AppLayerParserThreadCtx *alp_tctx, Flow
     const uint8_t direction = (flags & STREAM_TOSERVER) ? 0 : 1;
 
     /* we don't have the parser registered for this protocol */
-    if (p->StateAlloc == NULL)
+    if (p->StateAlloc == NULL) {
+        if (f->proto == IPPROTO_TCP) {
+            StreamTcpDisableAppLayer(f);
+        }
         goto end;
+    }
 
     if (flags & STREAM_GAP) {
         if (!(p->option_flags & APP_LAYER_PARSER_OPT_ACCEPT_GAPS)) {