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Commit 8ce44061 authored by Cong Wang's avatar Cong Wang Committed by David S. Miller
Browse files

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 <yoshfuji@linux-ipv6.org>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: default avatarCong Wang <amwang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b0983d3c

net/ipv6/af_inet6.c

+0 −48
Original line number Diff line number Diff line
@@ -1028,52 +1028,4 @@ static int __init inet6_init(void) 
}

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);