From 1731805967edf5d31448db2ae43cf72c6cf46c11 Mon Sep 17 00:00:00 2001
From: Philippe Antoine <pantoine@oisf.net>
Date: Mon, 6 Jul 2026 17:49:32 +0200
Subject: [PATCH] doh2: clear the buffer after processing it

Ticket: 8725

So that multiple HTTP2 DATA frames with EndOfStream flag set,
do not make the buffer grow, while processing it each time,
resulting in quadratic complexity
---
 rust/src/http2/http2.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rust/src/http2/http2.rs b/rust/src/http2/http2.rs
index 4667a134dc..5b0c3e1532 100644
--- a/rust/src/http2/http2.rs
+++ b/rust/src/http2/http2.rs
@@ -484,6 +484,7 @@ impl HTTP2Transaction {
                         SCAppLayerForceProtocolChange(flow, ALPROTO_DOH2);
                     }
                 }
+                doh.data_buf[dir.index()].clear();
             }
         }
     }