linux-kernel - Re: [PATCH v2 2/2] cgroup/psi: Set of->priv to NULL upon file release

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Message-ID: <aKitWH39wpfTF5st@slm.duckdns.org>
Date: Fri, 22 Aug 2025 07:48:08 -1000
From: Tejun Heo <tj@...nel.org>
To: Chen Ridong <chenridong@...weicloud.com>
Cc: gregkh@...uxfoundation.org, hannes@...xchg.org, mkoutny@...e.com,
	peterz@...radead.org, zhouchengming@...edance.com,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	lujialin4@...wei.com, chenridong@...wei.com, libaokun1@...wei.com
Subject: Re: [PATCH v2 2/2] cgroup/psi: Set of->priv to NULL upon file release

On Fri, Aug 22, 2025 at 07:07:15AM +0000, Chen Ridong wrote:
> From: Chen Ridong <chenridong@...wei.com>
> 
> Setting of->priv to NULL when the file is released enables earlier bug
> detection. This allows potential bugs to manifest as NULL pointer
> dereferences rather than use-after-free errors[1], which are generally more
> difficult to diagnose.
> 
> [1] https://lore.kernel.org/cgroups/38ef3ff9-b380-44f0-9315-8b3714b0948d@huaweicloud.com/T/#m8a3b3f88f0ff3da5925d342e90043394f8b2091b
> Signed-off-by: Chen Ridong <chenridong@...wei.com>

Applied to cgroup/for-6.17-fixes.

Thanks.

-- 
tejun