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 f4e8330..7198d66 100644
--- a/net/netfilter/xt_cgroup.c
+++ b/net/netfilter/xt_cgroup.c
@@ -31,7 +31,7 @@
if (info->invert & ~1)
return -EINVAL;
- return info->id ? 0 : -EINVAL;
+ return 0;
}
static bool