From: Tejun Heo <tj@kernel.org>
To: Z qiang <qiang.zhang1211@gmail.com>
Cc: jiangshanlai@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] workqueue: Fix UAF report by KASAN in pwq_release_workfn()
Date: Wed, 6 Sep 2023 07:01:29 -1000 [thread overview]
Message-ID: <ZPiwaaZaDPVexezn@slm.duckdns.org> (raw)
In-Reply-To: <CALm+0cVf+E_Y41AdEwLjm2gZAjzeKaZev1Tu1hUS-VpYH0eEHQ@mail.gmail.com>
On Wed, Sep 06, 2023 at 10:12:34AM +0800, Z qiang wrote:
> Flush the pwq_release_worker is insufficient, the call_rcu() is
> invoked to release wq
> in pwq_release_workfn(), this is also asynchronous.
But rcu_free_pwq() doesn't access wq or anything. The last access is from
the work function.
Thanks.
--
tejun
next prev parent reply other threads:[~2023-09-06 17:01 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-02 11:50 [PATCH] workqueue: Fix UAF report by KASAN in pwq_release_workfn() Zqiang
2023-09-05 18:51 ` Tejun Heo
2023-09-06 2:12 ` Z qiang
2023-09-06 17:01 ` Tejun Heo [this message]
2023-09-07 2:13 ` Z qiang
2023-09-18 9:18 ` Z qiang
2023-09-18 18:06 ` Tejun Heo
2023-09-19 2:14 ` Z qiang
2023-12-08 7:32 ` Xuewen Yan
2023-12-08 8:18 ` Z qiang
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