diff options
| author | Florian Westphal <fw@strlen.de> | 2017-09-26 11:57:54 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-09-26 20:15:17 +0200 |
| commit | e23ed762db7ed1950a6408c3be80bc56909ab3d4 (patch) | |
| tree | 1cb49a23e81377df67a3909cf45d139c7a197b82 /net | |
| parent | 48596a8ddc46f96afb6a2cd72787cb15d6bb01fc (diff) | |
netfilter: ipset: pernet ops must be unregistered last
Removing the ipset module leaves a small window where one cpu performs
module removal while another runs a command like 'ipset flush'.
ipset uses net_generic(), unregistering the pernet ops frees this
storage area.
Fix it by first removing the user-visible api handlers and the pernet
ops last.
Fixes: 1785e8f473082 ("netfiler: ipset: Add net namespace for ipset")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/ipset/ip_set_core.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c index e495b5e484b1..a7f049ff3049 100644 --- a/net/netfilter/ipset/ip_set_core.c +++ b/net/netfilter/ipset/ip_set_core.c @@ -2072,25 +2072,28 @@ static struct pernet_operations ip_set_net_ops = { static int __init ip_set_init(void) { - int ret = nfnetlink_subsys_register(&ip_set_netlink_subsys); + int ret = register_pernet_subsys(&ip_set_net_ops); + if (ret) { + pr_err("ip_set: cannot register pernet_subsys.\n"); + return ret; + } + + ret = nfnetlink_subsys_register(&ip_set_netlink_subsys); if (ret != 0) { pr_err("ip_set: cannot register with nfnetlink.\n"); + unregister_pernet_subsys(&ip_set_net_ops); return ret; } + ret = nf_register_sockopt(&so_set); if (ret != 0) { pr_err("SO_SET registry failed: %d\n", ret); nfnetlink_subsys_unregister(&ip_set_netlink_subsys); + unregister_pernet_subsys(&ip_set_net_ops); return ret; } - ret = register_pernet_subsys(&ip_set_net_ops); - if (ret) { - pr_err("ip_set: cannot register pernet_subsys.\n"); - nf_unregister_sockopt(&so_set); - nfnetlink_subsys_unregister(&ip_set_netlink_subsys); - return ret; - } + pr_info("ip_set: protocol %u\n", IPSET_PROTOCOL); return 0; } @@ -2098,9 +2101,10 @@ ip_set_init(void) static void __exit ip_set_fini(void) { - unregister_pernet_subsys(&ip_set_net_ops); nf_unregister_sockopt(&so_set); nfnetlink_subsys_unregister(&ip_set_netlink_subsys); + + unregister_pernet_subsys(&ip_set_net_ops); pr_debug("these are the famous last words\n"); } |