From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cong Wang Subject: [Patch net] xt_cgroup: initialize info->priv in cgroup_mt_check_v1() Date: Wed, 31 Jan 2018 15:02:47 -0800 Message-ID: <20180131230247.1417-1-xiyou.wangcong@gmail.com> Cc: netfilter-devel@vger.kernel.org, Cong Wang , Pablo Neira Ayuso To: netdev@vger.kernel.org Return-path: Sender: netdev-owner@vger.kernel.org List-Id: netfilter-devel.vger.kernel.org xt_cgroup_info_v1->priv is an internal pointer only used for kernel, we should not trust what user-space provides. Reported-by: Fixes: c38c4597e4bf ("netfilter: implement xt_cgroup cgroup2 path match") Cc: Pablo Neira Ayuso Signed-off-by: Cong Wang --- net/netfilter/xt_cgroup.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/netfilter/xt_cgroup.c b/net/netfilter/xt_cgroup.c index 1db1ce59079f..891f4e7e8ea7 100644 --- a/net/netfilter/xt_cgroup.c +++ b/net/netfilter/xt_cgroup.c @@ -52,6 +52,7 @@ static int cgroup_mt_check_v1(const struct xt_mtchk_param *par) return -EINVAL; } + info->priv = NULL; if (info->has_path) { cgrp = cgroup_get_from_path(info->path); if (IS_ERR(cgrp)) { -- 2.13.0