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

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Date:   Mon, 25 Oct 2021 10:00:00 +0000
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com
Cc:     linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: Re: Re: [PATCH] sched: Fix implicit type conversion

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.