linux-kernel - Re: [PATCH v3] blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd

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Message-ID: <YUDLt9uBNLhWL6Gt@slm.duckdns.org>
Date:   Tue, 14 Sep 2021 06:20:07 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Li Jinlin <lijinlin3@...wei.com>
Cc:     axboe@...nel.dk, paolo.valente@...aro.org, cgroups@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linfeilong@...wei.com, louhongxiang@...wei.com
Subject: Re: [PATCH v3] blk-cgroup: fix UAF by grabbing blkcg lock before
 destroying blkg pd

On Tue, Sep 14, 2021 at 12:26:05PM +0800, Li Jinlin wrote:
...
> Fix by garbbing the matching blkcg lock before trying to
> destroy blkg policy data.
> 
> Suggested-by: Tejun Heo <tj@...nel.org>
> Signed-off-by: Li Jinlin <lijinlin3@...wei.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun