From: Cong Wang <[email protected]> xt_cgroup_info_v1->priv is an internal pointer only used for kernel, we should not trust what user-space provides.
Reported-by: <[email protected]> Fixes: c38c4597e4bf ("netfilter: implement xt_cgroup cgroup2 path match") Cc: Pablo Neira Ayuso <[email protected]> Signed-off-by: Cong Wang <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]> --- 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)) { -- 2.11.0
