From: Christoph Hellwig <hch@infradead.org>
To: "zhangwensheng (E)" <zhangwensheng@huaweicloud.com>
Cc: lee.jones@linaro.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org
Subject: Re: Question: consult patch
Date: Thu, 11 Aug 2022 22:44:54 -0700 [thread overview]
Message-ID: <YvXo1uCFA57t89Nv@infradead.org> (raw)
In-Reply-To: <420a6c4a-e526-4e8b-d5bd-563c40aa94e1@huaweicloud.com>
On Fri, Aug 12, 2022 at 11:34:59AM +0800, zhangwensheng (E) wrote:
> Hi Lee ：
> I saw your patch because of CVE-2022-20158, the patch like below:
>
> ---
> mm: backing-dev: Take a reference to the bdi in use to prevent UAF
I can't see that patch anywhere, and I've not seen an bug report for it.
> Because of a distinct lack of locking and/or reference taking,
> blk_cleanup_queue() puts the final taken reference to the bdi, which
.. and blk_cleanup_queue also is gone upstream.
What am I missing?
next prev parent reply other threads:[~2022-08-12 5:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-12 3:34 zhangwensheng (E)
2022-08-12 5:44 ` Christoph Hellwig [this message]
2022-08-12 6:27 ` zhangwensheng (E)
2022-08-12 7:26 ` Lee Jones
2022-08-12 7:38 ` zhangwensheng (E)
2022-08-12 9:31 ` Lee Jones
2022-08-12 9:39 ` zhangwensheng (E)
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