Patch "netfilter: xt_cgroup: initialize info->priv in cgroup_mt_check_v1()" has been added to the 4.15-stable tree

Patch "netfilter: xt_cgroup: initialize info->priv in cgroup_mt_check_v1()" has been added to the 4.15-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    netfilter: xt_cgroup: initialize info->priv in cgroup_mt_check_v1()

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     netfilter-xt_cgroup-initialize-info-priv-in-cgroup_mt_check_v1.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ba7cd5d95f25cc6005f687dabdb4e7a6063adda9 Mon Sep 17 00:00:00 2001
From: Cong Wang <xiyou.wangcong@gmail.com>
Date: Wed, 31 Jan 2018 15:02:47 -0800
Subject: netfilter: xt_cgroup: initialize info->priv in cgroup_mt_check_v1()

From: Cong Wang <xiyou.wangcong@gmail.com>

commit ba7cd5d95f25cc6005f687dabdb4e7a6063adda9 upstream.

xt_cgroup_info_v1->priv is an internal pointer only used for kernel,
we should not trust what user-space provides.

Reported-by: <syzbot+4fbcfcc0d2e6592bd641@syzkaller.appspotmail.com>
Fixes: c38c4597e4bf ("netfilter: implement xt_cgroup cgroup2 path match")
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/netfilter/xt_cgroup.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/netfilter/xt_cgroup.c
+++ b/net/netfilter/xt_cgroup.c
@@ -52,6 +52,7 @@ static int cgroup_mt_check_v1(const stru
 		return -EINVAL;
 	}
 
+	info->priv = NULL;
 	if (info->has_path) {
 		cgrp = cgroup_get_from_path(info->path);
 		if (IS_ERR(cgrp)) {


Patches currently in stable-queue which might be from xiyou.wangcong@gmail.com are

queue-4.15/net_sched-gen_estimator-fix-lockdep-splat.patch
queue-4.15/netfilter-xt_cgroup-initialize-info-priv-in-cgroup_mt_check_v1.patch
queue-4.15/netfilter-xt_rateest-acquire-xt_rateest_mutex-for-hash-insert.patch