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Date: Thu, 9 Apr 2020 21:11:44 +0300
From: Alexander Popov <>
To: Markus Elfring <>,,
 Gilles Muller <>, Hans Verkuil <>,
 Jann Horn <>, Julia Lawall <>,
 Kees Cook <>, Mauro Carvalho Chehab
 <>, Michal Marek <>,
 Nicolas Palix <>
Subject: Re: [Cocci] Coccinelle rule for CVE-2019-18683

Markus, thanks for your remarks!

On 09.04.2020 11:41, Markus Elfring wrote:
> * The source code search pattern can be too generic.
>   How do you think about to consider additional constraints
>   for safer data control flow analysis?

Could you please elaborate on that?

I used 'exists' keyword to find at least one branch that has
mutex_unlock+kthread_stop+mutex_lock chain.

> * Other operation modes might become helpful.

Thanks! I added 'context' mode, it's very good for this purpose.

Best regards,

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