Re: [PATCH v2] sched: Fix implicit type conversion

[Peter Zijlstra]

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?