Re: [v4 PATCH] fs/proc: task_mmu.c: don't read mapcount for migration entry

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On Mon, 3 Apr 2023, Yang Shi wrote:

> On Mon, Apr 3, 2023 at 12:30 AM David Hildenbrand <david@xxxxxxxxxx> wrote:
> >
> > On 24.03.23 21:12, Yang Shi wrote:
> > > On Fri, Mar 24, 2023 at 4:25 AM Vlastimil Babka <vbabka@xxxxxxx> wrote:
> > >>
> > >> On 3/23/23 21:45, Yang Shi wrote:
> > >>> On Thu, Mar 23, 2023 at 3:11 AM Vlastimil Babka <vbabka@xxxxxxx> wrote:
> > >>>
> > >>> Out of curiosity, is there any public link for this CVE? Google search
> > >>> can't find it.
> > >>
> > >> Only this one is live so far, AFAIK
> > >>
> > >> https://bugzilla.redhat.com/show_bug.cgi?id=2180936
> > >
> > > Thank you.
> >
> > There is now
> >
> > https://access.redhat.com/security/cve/cve-2023-1582
> 
> Thank you.
> 

Hi Yang,

commit 24d7275ce2791829953ed4e72f68277ceb2571c6
Author: Yang Shi <shy828301@xxxxxxxxx>
Date:   Fri Feb 11 16:32:26 2022 -0800

    fs/proc: task_mmu.c: don't read mapcount for migration entry

is backported to 5.10 stable but not to 5.4 or earlier stable trees.  The 
commit advertises to fix a commit from 4.5.

Do we need stable backports for earlier trees or are they not affected?

Thanks!

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