Fix memory leak when using --dhcp-optsfile with DHCPv6 options

(cherry picked from commit 7294f8f794e140ddbc38f63dc5fd16c4ebaf9a1a)

backport-Fix-memory-leak-when-using-dhcp-optsfile-with-DHCPv6.patch

@@ -0,0 +1,48 @@
+From d16b995756dc079b1fdc2e63665793979f766a26 Mon Sep 17 00:00:00 2001
+From: renmingshuai <renmingshuai@huawei.com>
+Date: Sat, 30 Sep 2023 23:31:08 +0100
+Subject: [PATCH] Fix memory leak when using --dhcp-optsfile with DHCPv6
+ options.
+
+Conflict:NA
+Reference:https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=d16b995756dc079b1fdc2e63665793979f766a26
+---
+ src/option.c | 12 ++++++++++--
+ 1 file changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/src/option.c b/src/option.c
+index 8322725..286f06b 100644
+--- a/src/option.c
++++ b/src/option.c
+@@ -5734,11 +5734,11 @@ static void clear_dynamic_conf(void)
+     }
+ }
+ 
+-static void clear_dynamic_opt(void)
++static void clear_dhcp_opt(struct dhcp_opt **dhcp_opts)
+ {
+   struct dhcp_opt *opts, *cp, **up;
+ 
+-  for (up = &daemon->dhcp_opts, opts = daemon->dhcp_opts; opts; opts = cp)
++  for (up = dhcp_opts, opts = *dhcp_opts; opts; opts = cp)
+     {
+       cp = opts->next;
+       
+@@ -5752,6 +5752,14 @@ static void clear_dynamic_opt(void)
+     }
+ }
+ 
++static void clear_dynamic_opt(void)
++{
++  clear_dhcp_opt(&daemon->dhcp_opts);
++#ifdef HAVE_DHCP6
++  clear_dhcp_opt(&daemon->dhcp_opts6);
++#endif
++}
++
+ void reread_dhcp(void)
+ {
+    struct hostsfile *hf;
+-- 
+2.23.0
+

dnsmasq.spec

@@ -1,6 +1,6 @@
 Name:           dnsmasq
 Version:        2.86
-Release:        6
+Release:        7
 Summary:        Dnsmasq provides network infrastructure for small networks
 License:        GPLv2 or GPLv3
 URL:            http://www.thekelleys.org.uk/dnsmasq/
@@ -46,6 +46,7 @@ Patch35:        backport-Handle-DS-records-for-unsupported-crypto-algorithms-.pa
 Patch36:        backport-Optimize-inserting-records-into-server-list.patch
 Patch37:        backport-Fix-massive-confusion-on-server-reload.patch
 Patch38:        backport-Fix-use-after-free-in-mark_servers.patch
+Patch39:        backport-Fix-memory-leak-when-using-dhcp-optsfile-with-DHCPv6.patch
 
 BuildRequires:  gcc
 BuildRequires:  dbus-devel pkgconfig libidn2-devel nettle-devel systemd
@@ -135,6 +136,12 @@ install -Dpm644 %{SOURCE2} $RPM_BUILD_ROOT%{_sysusersdir}/dnsmasq.conf
 %{_mandir}/man8/dnsmasq*
 
 %changelog
+* Wed Nov 22 2023 renmingshuai <renmingshuai@huawei.com> - 2.86-7
+- Type:bugfix
+- Id:NA
+- SUG:NA
+- DESC:Fix memory leak when using --dhcp-optsfile with DHCPv6 options
+
 * Thu Apr 27 2023 yanglu <yanglu72@h-partners.com> - 2.86-6
 - Type:bugfix
 - Id:NA