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 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
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-4.9 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-4.9/netfilter-xt_cgroup-initialize-info-priv-in-cgroup_mt_check_v1.patch queue-4.9/netfilter-xt_rateest-acquire-xt_rateest_mutex-for-hash-insert.patch queue-4.9/xfrm-check-id-proto-in-validate_tmpl.patch