linux-kernel - Re: [PATCH cgroup/for-next] cpuset: fix missing error return in update

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Message-ID: <eefa4f64-a2b2-47f4-8eb6-940f90eca850@huaweicloud.com>
Date: Fri, 19 Sep 2025 18:12:49 +0800
From: Chen Ridong <chenridong@...weicloud.com>
To: longman@...hat.com, tj@...nel.org, hannes@...xchg.org, mkoutny@...e.com
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
 lujialin4@...wei.com, chenridong@...wei.com
Subject: Re: [PATCH cgroup/for-next] cpuset: fix missing error return in
 update_cpumask



On 2025/9/19 17:49, Chen Ridong wrote:
> From: Chen Ridong <chenridong@...wei.com>
> 
> The commit c6366739804f ("cpuset: refactor cpus_allowed_validate_change")
> inadvertently removed the error return when cpus_allowed_validate_change()
> fails. This patch restores the proper error handling by returning retval
> when the validation check fails.
> 
> Fixes: c6366739804f ("cpuset: refactor cpus_allowed_validate_change")
> Signed-off-by: Chen Ridong <chenridong@...wei.com>
> ---
>  kernel/cgroup/cpuset.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
> index 506a7178f0b3..20dface3c3e0 100644
> --- a/kernel/cgroup/cpuset.c
> +++ b/kernel/cgroup/cpuset.c
> @@ -2515,7 +2515,8 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
>  	compute_trialcs_excpus(trialcs, cs);
>  	trialcs->prs_err = PERR_NONE;
>  
> -	if (cpus_allowed_validate_change(cs, trialcs, &tmp) < 0)
> +	retval = cpus_allowed_validate_change(cs, trialcs, &tmp);
> +	if (retval < 0)
>  		goto out_free;
>  
>  	/*

Hi Longman, TJ,

Sorry about the bug introduced in patch 8. Could you please apply this patch to fix the issue?

-- 
Best regards,
Ridong