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?
