[PATCH] maple_tree: Fix potential out-of-bounds access in mas_wr_end_piv()

[Andrew Morton]

On Sat, 6 May 2023 09:48:19 +0800 Peng Zhang <perlyzhang at gmail.com> wrote:

> >> Fixes: 54a611b60590 ("Maple Tree: add new data structure")
> > 
> > Cc stable ?
> I don't know if it should be cc stable since Andrew says it
> always needs to describe user-visible impact.

I suppose we may as well backport it - there may be new users of maple
tree which *do* trigger this, and anyone who who tries to backport
those users into earlier kernels will get a nasty surprise.

So I'll add cc:stable to v3, but I won't queue it as a hotfix, so it's
well tested before we propose the backport.