Commit b3a27bfb authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso Committed by David S. Miller
Browse files

[NETFILTER]: ctnetlink: check for listeners before sending expectation events 



This patch uses nfnetlink_has_listeners to check for listeners in
userspace.

Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b9a37e0c

net/ipv4/netfilter/ip_conntrack_netlink.c

+3 −0
Original line number Diff line number Diff line
@@ -1257,6 +1257,9 @@ static int ctnetlink_expect_event(struct notifier_block *this, 
	} else

		return NOTIFY_DONE;



	if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW))

		return NOTIFY_DONE;



	skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);

	if (!skb)

		return NOTIFY_DONE;

net/netfilter/nf_conntrack_netlink.c

+3 −0
Original line number Diff line number Diff line
@@ -1278,6 +1278,9 @@ static int ctnetlink_expect_event(struct notifier_block *this, 
	} else

		return NOTIFY_DONE;



	if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW))

		return NOTIFY_DONE;



	skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);

	if (!skb)

		return NOTIFY_DONE;

CRA Git | Maintained and supported by SUSTech CRA and CCSE