[Devel] [PATCH 12/14] ipset: prohibit ipset from the inside CT

[Kirill Tkhai]

Port diff-ve-netfilter-ipset-prohibit-ipset-from-the-inside-CT from 2.6.32:

Currently a CT owner can configure ipset rules which are not virtualized =>
affect the whole Hardware Node.

We are going to virtualize ipset in PCS7 (3.10-x, PSBM-27793),
let's prohibit ipset configuration from inside a CT while it's not done.

https://jira.sw.ru/browse/PSBM-27792
https://bugzilla.openvz.org/show_bug.cgi?id=2644

Signed-off-by: Kirill Tkhai <ktkhai at parallels.com>
---
 net/netfilter/nfnetlink.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index e17ad78..07e040f 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -367,7 +367,9 @@ static void nfnetlink_rcv(struct sk_buff *skb)
 	    skb->len < nlh->nlmsg_len)
 		return;
 
-	if (!ns_capable(net->user_ns, CAP_VE_NET_ADMIN)) {
+	if (!ns_capable(net->user_ns, CAP_VE_NET_ADMIN) ||
+	    (!ns_capable(net->user_ns, CAP_VE_NET_ADMIN) &&
+	     NFNL_SUBSYS_ID(nlh->nlmsg_type) == NFNL_SUBSYS_IPSET)) {
 		netlink_ack(skb, nlh, -EPERM);
 		return;
 	}