Messages in this thread | | | Date | Thu, 11 Aug 2022 22:44:54 -0700 | From | Christoph Hellwig <> | Subject | Re: Question: consult patch |
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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?
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