diff options
| -rw-r--r-- | net/netfilter/nfnetlink.c | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c index ad3bbe34ca8829..2f7c477fc9e704 100644 --- a/net/netfilter/nfnetlink.c +++ b/net/netfilter/nfnetlink.c @@ -45,7 +45,6 @@ MODULE_DESCRIPTION("Netfilter messages via netlink socket"); static unsigned int nfnetlink_pernet_id __read_mostly; struct nfnl_net { - unsigned int ctnetlink_listeners; struct sock *nfnl; }; @@ -673,18 +672,8 @@ static int nfnetlink_bind(struct net *net, int group) #ifdef CONFIG_NF_CONNTRACK_EVENTS if (type == NFNL_SUBSYS_CTNETLINK) { - struct nfnl_net *nfnlnet = nfnl_pernet(net); - nfnl_lock(NFNL_SUBSYS_CTNETLINK); - - if (WARN_ON_ONCE(nfnlnet->ctnetlink_listeners == UINT_MAX)) { - nfnl_unlock(NFNL_SUBSYS_CTNETLINK); - return -EOVERFLOW; - } - - nfnlnet->ctnetlink_listeners++; - if (nfnlnet->ctnetlink_listeners == 1) - WRITE_ONCE(net->ct.ctnetlink_has_listener, true); + WRITE_ONCE(net->ct.ctnetlink_has_listener, true); nfnl_unlock(NFNL_SUBSYS_CTNETLINK); } #endif @@ -694,15 +683,12 @@ static int nfnetlink_bind(struct net *net, int group) static void nfnetlink_unbind(struct net *net, int group) { #ifdef CONFIG_NF_CONNTRACK_EVENTS - int type = nfnl_group2type[group]; - - if (type == NFNL_SUBSYS_CTNETLINK) { - struct nfnl_net *nfnlnet = nfnl_pernet(net); + if (group <= NFNLGRP_NONE || group > NFNLGRP_MAX) + return; + if (nfnl_group2type[group] == NFNL_SUBSYS_CTNETLINK) { nfnl_lock(NFNL_SUBSYS_CTNETLINK); - WARN_ON_ONCE(nfnlnet->ctnetlink_listeners == 0); - nfnlnet->ctnetlink_listeners--; - if (nfnlnet->ctnetlink_listeners == 0) + if (!nfnetlink_has_listeners(net, group)) WRITE_ONCE(net->ct.ctnetlink_has_listener, false); nfnl_unlock(NFNL_SUBSYS_CTNETLINK); } |