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

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To: Li Jinlin <lijinlin3@xxxxxxxxxx>
Subject: Re: [PATCH v3] blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Tue, 14 Sep 2021 06:20:07 -1000
Cc: axboe@xxxxxxxxx, paolo.valente@xxxxxxxxxx, cgroups@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linfeilong@xxxxxxxxxx, louhongxiang@xxxxxxxxxx
In-reply-to: <20210914042605.3260596-1-lijinlin3@huawei.com>
References: <20210914042605.3260596-1-lijinlin3@huawei.com>

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@xxxxxxxxxx>
> Signed-off-by: Li Jinlin <lijinlin3@xxxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

Thanks.

-- 
tejun

References:
- [PATCH v3] blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
  - From: Li Jinlin

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