From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Guy Briggs Subject: [PATCH 6/6] audit: send multicast messages only if there are listeners Date: Fri, 18 Apr 2014 13:34:10 -0400 Message-ID: <6f2cbed195664cc9d50eab61ec85d457e6a3079f.1397831970.git.rgb@redhat.com> References: <20140324183406.GE28666@madcap2.tricolour.ca> Cc: Richard Guy Briggs , davem@davemloft.net, eparis@redhat.com, netfilter-devel@vger.kernel.org, hadi@mojatatu.com, sgrubb@redhat.com To: linux-audit@redhat.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, selinux@tycho.nsa.gov, linux-security-module@vger.kernel.org Return-path: In-Reply-To: <20140324183406.GE28666@madcap2.tricolour.ca> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-Id: netfilter-devel.vger.kernel.org Test first to see if there are any userspace multicast listeners bound to the socket before starting the multicast send work. Signed-off-by: Richard Guy Briggs --- kernel/audit.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/kernel/audit.c b/kernel/audit.c index d272cc1..33531d7 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -435,6 +435,9 @@ static void kauditd_send_multicast_skb(struct sk_buff *skb) struct audit_net *aunet = net_generic(&init_net, audit_net_id); struct sock *sock = aunet->nlsk; + if (!netlink_has_listeners(sock, AUDIT_NLGRP_READLOG)) + return; + /* * The seemingly wasteful skb_copy() rather than bumping the refcount * using skb_get() is necessary because non-standard mods are made to -- 1.7.1