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

[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
...@@ -1257,6 +1257,9 @@ static int ctnetlink_expect_event(struct notifier_block *this, ...@@ -1257,6 +1257,9 @@ static int ctnetlink_expect_event(struct notifier_block *this,
} else } else
return NOTIFY_DONE; return NOTIFY_DONE;
if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW))
return NOTIFY_DONE;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb) if (!skb)
return NOTIFY_DONE; return NOTIFY_DONE;
......
...@@ -1278,6 +1278,9 @@ static int ctnetlink_expect_event(struct notifier_block *this, ...@@ -1278,6 +1278,9 @@ static int ctnetlink_expect_event(struct notifier_block *this,
} else } else
return NOTIFY_DONE; return NOTIFY_DONE;
if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW))
return NOTIFY_DONE;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb) if (!skb)
return NOTIFY_DONE; return NOTIFY_DONE;
......
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