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From: Tejun Heo <tj@kernel.org>
To: Zqiang <qiang.zhang1211@gmail.com>
Cc: jiangshanlai@gmail.com, syzkaller-bugs@googlegroups.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] workqueue: Fix UAF report by KASAN in pwq_release_workfn()
Date: Wed, 4 Oct 2023 09:15:41 -1000	[thread overview]
Message-ID: <ZR253RO-apOz0DUg@slm.duckdns.org> (raw)
In-Reply-To: <20230920060704.24981-1-qiang.zhang1211@gmail.com>

On Wed, Sep 20, 2023 at 02:07:04PM +0800, Zqiang wrote:
> Currently, for UNBOUND wq, if the apply_wqattrs_prepare() return error,
> the apply_wqattr_cleanup() will be called and use the pwq_release_worker
> kthread to release resources asynchronously. however, the kfree(wq) is
> invoked directly in failure path of alloc_workqueue(), if the kfree(wq)
> has been executed and when the pwq_release_workfn() accesses wq, this
> leads to the following scenario:

Applied to cgroup/for-6.6-fixes.

Thanks.

-- 
tejun

      reply	other threads:[~2023-10-04 19:16 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-20  6:07 Zqiang
2023-10-04 19:15 ` Tejun Heo [this message]

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