linux-kernel - Re: Re: [PATCH] sched: Fix implicit type conversion

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Message-ID: <YXaF56oFBaDAuX6b@hirez.programming.kicks-ass.net>
Date:   Mon, 25 Oct 2021 12:24:39 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>
Cc:     mingo@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: Re: [PATCH] sched: Fix implicit type conversion

On Mon, Oct 25, 2021 at 10:00:00AM +0000, Jiasheng Jiang wrote:
> On Mon, Oct 25, 2021 at 08:57:31AM +0000, Peter Zijlstra wrote:
> >> The variable 'n' is defined as ULONG. However in the cpumask_next(),
> >> it is used as INT.
> >> That is vulnerable and may cause overflow.
> >> Therefore, it might be better to define 'n' as INT.
> 
> >-ENOPARSE
> 
> I don't understand the 'ENOPARSE'.
> Please give me more details.

I've no idea what your changelog is trying to say, or how your patch
makes a difference.