From: "tj@kernel.org" <tj@kernel.org>
To: "Lixiong Liu (刘利雄)" <Lixiong.Liu@mediatek.com>
Cc: "lizefan@huawei.com" <lizefan@huawei.com>,
"hannes@cmpxchg.org" <hannes@cmpxchg.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mediatek@lists.infradead.org"
<linux-mediatek@lists.infradead.org>,
"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
"Wenju Xu (许文举)" <Wenju.Xu@mediatek.com>,
wsd_upstream <wsd_upstream@mediatek.com>,
"Jing-Ting Wu (吳靜婷)" <Jing-Ting.Wu@mediatek.com>,
"WJ Wang (王军)" <wj.wang@mediatek.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"Andress Kuo (郭孟修)" <Andress.Kuo@mediatek.com>,
"matthias.bgg@gmail.com" <matthias.bgg@gmail.com>
Subject: Re: cgroup user-after-free
Date: Thu, 12 Jan 2023 15:14:30 -1000 [thread overview]
Message-ID: <Y8Cwdsk5pYNd8fX8@slm.duckdns.org> (raw)
In-Reply-To: <697032f2331a92eec0e03e85e46cb78bd975a788.camel@mediatek.com>
On Thu, Jan 12, 2023 at 09:48:55AM +0000, Lixiong Liu (刘利雄) wrote:
> Hi,
>
> We meet cgroup use-after-free happened in T SW version with
>
> kernel-5.15.
>
> Root cause:
> cgroup_migrate_finish free cset’s cgroup,
>
> but cgroup_sk_alloc use the freed cgroup,
>
> then use-after-free happened.
Sounds similar to the problem fixed by 07fd5b6cdf3c ("cgroup: Use separate
src/dst nodes when preloading css_sets for migration"). Can you try it out?
Thanks.
--
tejun
next prev parent reply other threads:[~2023-01-13 1:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-12 9:48 Lixiong Liu (刘利雄)
2023-01-13 1:14 ` tj [this message]
2023-01-13 5:40 ` Lixiong Liu (刘利雄)
2023-02-01 6:04 ` Lixiong Liu (刘利雄)
2023-02-02 19:50 ` tj
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