linux-kernel - Re: [PATCH] maple_tree: Fix potential out-of-bounds access in mas_wr_end

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Message-Id: <20230507174652.65fb5725c3a72dd293d417b3@linux-foundation.org>
Date:   Sun, 7 May 2023 17:46:52 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Peng Zhang <perlyzhang@...il.com>
Cc:     "Liam R. Howlett" <Liam.Howlett@...cle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, maple-tree@...ts.infradead.org,
        Peng Zhang <zhangpeng.00@...edance.com>
Subject: Re: [PATCH] maple_tree: Fix potential out-of-bounds access in
 mas_wr_end_piv()

On Sat, 6 May 2023 09:48:19 +0800 Peng Zhang <perlyzhang@...il.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.