linux-kernel - Re: [PATCH] maple_tree: Fix the error of mas->min/max in mas_skip

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Message-Id: <20230308175552.60b3f6a3efda2289dc6c5bc9@linux-foundation.org>
Date:   Wed, 8 Mar 2023 17:55:52 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Peng Zhang <zhangpeng.00@...edance.com>
Cc:     Liam.Howlett@...cle.com, snild@...y.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, maple-tree@...ts.infradead.org,
        Stable@...r.kernel.org
Subject: Re: [PATCH] maple_tree: Fix the error of mas->min/max in
 mas_skip_node()

On Wed,  8 Mar 2023 00:03:40 +0800 Peng Zhang <zhangpeng.00@...edance.com> wrote:

> The assignment of mas->min and mas->max is wrong. mas->min and mas->max
> should represent the range of the current node. After mas_ascend()
> returns, mas-min and mas->max already represent the range of the current
> node, so we should delete these assignments of mas->min and mas->max.
> 

Please fully describe the user-visible effects of the flaw, especially
when proposing a -stable backport.