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From: Peter Zijlstra <peterz@infradead.org>
To: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Cc: mingo@redhat.com, juri.lelli@redhat.com,
	vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
	rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
	bristot@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] sched: Fix implicit type conversion
Date: Mon, 25 Oct 2021 14:43:55 +0200	[thread overview]
Message-ID: <YXami/C2FzwDiKxp@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <1635164377-2426740-1-git-send-email-jiasheng@iscas.ac.cn>

On Mon, Oct 25, 2021 at 12:19:37PM +0000, Jiasheng Jiang 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.
> For example, if the value of 'n' is (2^31 - 1), then it can pass the

That would need nr_cpu_ids to be that large. How's that going to happen?

      reply	other threads:[~2021-10-25 12:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-25 12:19 [PATCH v2] sched: Fix implicit type conversion Jiasheng Jiang
2021-10-25 12:43 ` Peter Zijlstra [this message]

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