linux-kernel - Re: [PATCH v2 1/7] mm: fix off-by-one error in VMA count limit checks

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Message-ID: <87v7lifpi9.fsf@trenco.lwn.net>
Date: Tue, 16 Sep 2025 08:20:14 -0600
From: Jonathan Corbet <corbet@....net>
To: Andrew Morton <akpm@...ux-foundation.org>, Kalesh Singh
 <kaleshsingh@...gle.com>
Cc: minchan@...nel.org, lorenzo.stoakes@...cle.com, david@...hat.com,
 Liam.Howlett@...cle.com, rppt@...nel.org, pfalcato@...e.de,
 kernel-team@...roid.com, android-mm@...gle.com, stable@...r.kernel.org,
 Alexander Viro <viro@...iv.linux.org.uk>, Christian Brauner
 <brauner@...nel.org>, Jan Kara <jack@...e.cz>, Kees Cook
 <kees@...nel.org>, Vlastimil Babka <vbabka@...e.cz>, Suren Baghdasaryan
 <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>, Steven Rostedt
 <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, Mathieu
 Desnoyers <mathieu.desnoyers@...icios.com>, Ingo Molnar
 <mingo@...hat.com>, Peter
 Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>,
 Vincent Guittot <vincent.guittot@...aro.org>, Dietmar Eggemann
 <dietmar.eggemann@....com>, Ben Segall <bsegall@...gle.com>, Mel Gorman
 <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>, Jann Horn
 <jannh@...gle.com>, Shuah Khan <shuah@...nel.org>,
 linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 linux-mm@...ck.org, linux-trace-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 1/7] mm: fix off-by-one error in VMA count limit checks

Andrew Morton <akpm@...ux-foundation.org> writes:

> On Mon, 15 Sep 2025 09:36:32 -0700 Kalesh Singh <kaleshsingh@...gle.com> wrote:
>
>> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
>
> lol.
>
> x1:/usr/src/25> grep "Fixes.*1da177e4c3f4" ../gitlog|wc -l
> 661
>
> we really blew it that time!

A few years back I made a list of the most-fixed commits in the kernel
history; unsurprisingly that one (I call it the "original sin") came out
on top:

  https://lwn.net/Articles/914632/

Perhaps the time has come to update that analysis.

jon