From: Philippe Antoine <pantoine@oisf.net>
Date: Mon, 21 Apr 2025 19:16:38 +0000 (+0200)
Subject: websocket: fixes substraction
X-Git-Tag: suricata-8.0.0-rc1~435
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F13064%2Fhead;p=thirdparty%2Fsuricata.git

websocket: fixes substraction

Fixes: 16f74c68aaa9 ("websocket: use max window bits of 15")
---

diff --git a/rust/src/websocket/websocket.rs b/rust/src/websocket/websocket.rs
index 3b86defe9c..f86101743d 100644
--- a/rust/src/websocket/websocket.rs
+++ b/rust/src/websocket/websocket.rs
@@ -261,7 +261,7 @@ impl WebSocketState {
                                     let end = if v.len() + (dec.total_out() - before) as usize
                                         > max_pl_size as usize
                                     {
-                                        v.len() - max_pl_size as usize
+                                        max_pl_size as usize - v.len()
                                     } else {
                                         (dec.total_out() - before) as usize
                                     };