From 8ce440610357b77587433d0df647cea69a6890a8 Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Sat, 21 Sep 2013 11:12:21 +0800 Subject: [PATCH] ipv6: do not allow ipv6 module to be removed There was some bug report on ipv6 module removal path before. Also, as Stephen pointed out, after vxlan module gets ipv6 support, the ipv6 stub it used is not safe against this module removal either. So, let's just remove inet6_exit() so that ipv6 module will not be able to be unloaded. Cc: Hideaki YOSHIFUJI Cc: Stephen Hemminger Cc: David S. Miller Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- net/ipv6/af_inet6.c | 48 --------------------------------------------- 1 file changed, 48 deletions(-) diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 7c96100b021e..4966b124dc2e 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -1028,52 +1028,4 @@ out_unregister_tcp_proto: } module_init(inet6_init); -static void __exit inet6_exit(void) -{ - if (disable_ipv6_mod) - return; - - /* First of all disallow new sockets creation. */ - sock_unregister(PF_INET6); - /* Disallow any further netlink messages */ - rtnl_unregister_all(PF_INET6); - - udpv6_exit(); - udplitev6_exit(); - tcpv6_exit(); - - /* Cleanup code parts. */ - ipv6_packet_cleanup(); - ipv6_frag_exit(); - ipv6_exthdrs_exit(); - addrconf_cleanup(); - ip6_flowlabel_cleanup(); - ndisc_late_cleanup(); - ip6_route_cleanup(); -#ifdef CONFIG_PROC_FS - - /* Cleanup code parts. */ - if6_proc_exit(); - ipv6_misc_proc_exit(); - udplite6_proc_exit(); - raw6_proc_exit(); -#endif - ipv6_netfilter_fini(); - ipv6_stub = NULL; - igmp6_cleanup(); - ndisc_cleanup(); - ip6_mr_cleanup(); - icmpv6_cleanup(); - rawv6_exit(); - - unregister_pernet_subsys(&inet6_net_ops); - proto_unregister(&rawv6_prot); - proto_unregister(&udplitev6_prot); - proto_unregister(&udpv6_prot); - proto_unregister(&tcpv6_prot); - - rcu_barrier(); /* Wait for completion of call_rcu()'s */ -} -module_exit(inet6_exit); - MODULE_ALIAS_NETPROTO(PF_INET6); -- 2.39.5