From: Daniel Borkmann <dborkman@redhat.com>
Date: Mon, 18 Aug 2014 13:46:28 +0000 (+0200)
Subject: netfilter: x_tables: allow to use default cgroup match
X-Git-Tag: firefly_0821_release~176^2~3268^2~20^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=caa8ad94edf686d02b555c65a6162c0d1b434958;p=firefly-linux-kernel-4.4.55.git

netfilter: x_tables: allow to use default cgroup match

There's actually no good reason why we cannot use cgroup id 0,
so lets just remove this artificial barrier.

Reported-by: Alexey Perevalov <a.perevalov@samsung.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Tested-by: Alexey Perevalov <a.perevalov@samsung.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/net/netfilter/xt_cgroup.c b/net/netfilter/xt_cgroup.c
index f4e833005320..7198d660b4de 100644
--- a/net/netfilter/xt_cgroup.c
+++ b/net/netfilter/xt_cgroup.c
@@ -31,7 +31,7 @@ static int cgroup_mt_check(const struct xt_mtchk_param *par)
 	if (info->invert & ~1)
 		return -EINVAL;
 
-	return info->id ? 0 : -EINVAL;
+	return 0;
 }
 
 static bool