fix leak in config reload

fix-leak-in-config-reload.patch

@@ -0,0 +1,37 @@
+From b4db7c3855c22c5b6cfcbabffd760e1808144e2e Mon Sep 17 00:00:00 2001
+From: dormando <dormando@rydia.net>
+Date: Sun, 10 Mar 2024 10:17:24 -0700
+Subject: [PATCH] proxy: fix leak in config reload
+
+- config reload loads the code from disk, then dumps it into an internal
+  binary blob
+- that binary blob is loaded from memory into each worker thread
+- that temporary blob wasn't being freed
+
+if you have large initial lua and reload every second for hours on end
+you'd leak a few megs of ram
+
+---
+ proxy_config.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/proxy_config.c b/proxy_config.c
+index cfe43b1..65e7e3a 100644
+--- a/proxy_config.c
++++ b/proxy_config.c
+@@ -240,6 +240,12 @@ int proxy_load_config(void *arg) {
+     db->buf = malloc(db->size);
+     lua_dump(L, _dump_helper, db, 0);
+     // 0 means no error.
++    if (ctx->proxy_code) {
++        struct _dumpbuf *old = ctx->proxy_code;
++        free(old->buf);
++        free(old);
++        ctx->proxy_code = NULL;
++    }
+     ctx->proxy_code = db;
+ 
+     // now we complete the data load by calling the function.
+-- 
+2.27.0
+

memcached.spec

@@ -7,7 +7,7 @@
 
 Name:          memcached
 Version:       1.6.22
-Release:       1
+Release:       2
 Epoch:         0
 Summary:       A high-performance, distributed memory object caching system
 License:       BSD-3-Clause
@@ -17,6 +17,7 @@ Source1:       https://releases.pagure.org/memcached-selinux/memcached-selinux-1
 Source2:       memcached.sysconfig
 
 Patch0001:     memcached-unit.patch
+Patch0002:     fix-leak-in-config-reload.patch
 
 BuildRequires: systemd perl-generators perl(Test::More) perl(Test::Harness)
 BuildRequires: selinux-policy-devel libevent-devel make gcc
@@ -62,6 +63,7 @@ optimised for use with this version of memcached.
 %prep
 %setup -q -b 1
 %patch1 -p1 -b .unit
+%patch2 -p1 -b .reload
 
 %build
 %configure \
@@ -144,6 +146,9 @@ fi
 %{_mandir}/man1/memcached.1*
 
 %changelog
+* Thu Jun 06 2024 yanshuai <yanshuai01@kylinos.cn> - 0:1.6.22-2
+- proxy: fix leak in config reload
+
 * Thu Nov 02 2023 wangkai <13474090681@163.com> - 0:1.6.22-1
 - Update to 1.6.22 for fix CVE-2023-46852,CVE-2023-46853