From 0c507c581f7d0c556dd078d3f943700fbb6bb16d Mon Sep 17 00:00:00 2001
From: noctuum <25441068+noctuum@users.noreply.github.com>
Date: Sun, 13 Sep 2026 08:12:53 +0500
Subject: [PATCH] Release the zlib deflate state in gzip_compress_to_vector.

deflateEnd was never called, leaking 168 kB per compressed response.
---
 src/utils/gzip.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/utils/gzip.cc b/src/utils/gzip.cc
index b0a416f0..3c01ad2b 100644
--- a/src/utils/gzip.cc
+++ b/src/utils/gzip.cc
@@ -5,6 +5,8 @@
 #include <zlib.h>
 #include <torrent/exceptions.h>
 
+#include "utils/functional.h"
+
 namespace utils {
 
 void
@@ -21,6 +23,8 @@ gzip_compress_to_vector(const char* buffer, unsigned int length, std::vector<cha
   if (deflateInit2(&zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED, window_bits | gzip_encoding, gzip_level, Z_DEFAULT_STRATEGY) != Z_OK)
     throw torrent::internal_error("gzip_compress_to_vector(...) could not initialize gzip deflate.");
 
+  scope_guard guard([&zs]() { deflateEnd(&zs); });
+
   auto max_response_size = deflateBound(&zs, length);
 
   output.resize(offset + max_response_size);