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Date: Mon, 13 Mar 2023 16:26:30 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Zheng Wang <zyytlz.wz@....com>
Cc: davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
hackerzheng666@...il.com, 1395428693sheep@...il.com,
alex000young@...il.com
Subject: Re: [PATCH net] net: ethernet: fix use after free bug in
ns83820_remove_one due to race condition
On Thu, 9 Mar 2023 17:42:31 +0800 Zheng Wang wrote:
> + cancel_work_sync(&dev->tq_refill);
> ns83820_disable_interrupts(dev); /* paranoia */
>
> unregister_netdev(ndev);
Canceling the work before unregister can't work.
Please take a closer look, the work to refill a ring should be
canceled when the ring itself is dismantled.
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