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Date:   Wed, 13 Apr 2022 08:57:53 +0200
From:   Krzysztof Kozlowski <>
To:     Lin Ma <>,,,,,,
Subject: Re: [PATCH v0] nfc: nci: add flush_workqueue to prevent uaf

On 12/04/2022 18:04, Lin Ma wrote:
> Our detector found a concurrent use-after-free bug when detaching an
> NCI device. The main reason for this bug is the unexpected scheduling
> between the used delayed mechanism (timer and workqueue).
> The race can be demonstrated below:


Reviewed-by: Krzysztof Kozlowski <>

Best regards,

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