netfilter: xt_cgroup: initialize info->priv in cgroup_mt_check_v1()
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Web: https://git.kernel.org/torvalds/c/ba7cd5d95f25cc6005f687dabdb4e7a6063adda9 Commit: ba7cd5d95f25cc6005f687dabdb4e7a6063adda9 Parent: 6be3bcd75afb673a37a82e18ba46d50430f172c1 Refname: refs/heads/master Author: Cong Wang <[email protected]> AuthorDate: Wed Jan 31 15:02:47 2018 -0800 Committer: Pablo Neira Ayuso <[email protected]> CommitDate: Fri Feb 2 18:26:37 2018 +0100 netfilter: xt_cgroup: initialize info->priv in cgroup_mt_check_v1() 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)) { -- To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html