--- zzzz-none-000/linux-4.9.279/net/ipv4/sysctl_net_ipv4.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/net/ipv4/sysctl_net_ipv4.c	2023-02-08 11:43:43.000000000 +0000
@@ -1040,7 +1040,9 @@
 	kfree(net->ipv4.sysctl_local_reserved_ports);
 	table = net->ipv4.ipv4_hdr->ctl_table_arg;
 	unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
-	kfree(table);
+
+	if (!net_eq(net, &init_net))
+		kfree(table);
 }
 
 static __net_initdata struct pernet_operations ipv4_sysctl_ops = {