Re: [PATCH V5] mm: fix use-after free of page_ext after race with memory-offline

[Andrew Morton]

On Fri, 26 Aug 2022 12:26:33 +0530 Charan Teja Kalla <quic_charante@xxxxxxxxxxx> wrote:

> The below is one path where race between page_ext and  offline of the
> respective memory blocks will cause use-after-free on the access of
> page_ext structure.

What are people's thoughts on a -stable backport?  It looks like the
bug has been there for years and the means of hitting it are obscure
and the patch isn't minor, so I'm thinking no?