Re: [PATCH v2] mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()

[Andrew Morton]

On Fri,  1 Oct 2021 14:56:30 -0700 Eric Dumazet <eric.dumazet@xxxxxxxxx> wrote:

> From: Eric Dumazet <edumazet@xxxxxxxxxx>
> 
> syzbot reported access to unitialized memory in mbind() [1]

I'm lazy.  What memory is being accessed-unintialized?

> Issue came with commit bda420b98505 ("numa balancing: migrate on
> fault among multiple bound nodes")

No cc:stable?  What's the worst-case user-visible impact here?