linux-kernel - Re: [PATCH] i3c: master: cdns: Fix use after free vulnerability in cdns_i3c

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Message-ID: <172658508687.68424.17048789596930423201.b4-ty@bootlin.com>
Date: Tue, 17 Sep 2024 16:58:43 +0200
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: pgaj@...ence.com, Kaixin Wang <kxwang23@...udan.edu.cn>
Cc: linux-kernel@...r.kernel.org, 21210240012@...udan.edu.cn,
	21302010073@...udan.edu.cn
Subject: Re: [PATCH] i3c: master: cdns: Fix use after free vulnerability in
 cdns_i3c_master Driver Due to Race Condition

On Wed, 11 Sep 2024 23:35:44 +0800, Kaixin Wang wrote:
> In the cdns_i3c_master_probe function, &master->hj_work is bound with
> cdns_i3c_master_hj. And cdns_i3c_master_interrupt can call
> cnds_i3c_master_demux_ibis function to start the work.
> 
> If we remove the module which will call cdns_i3c_master_remove to
> make cleanup, it will free master->base through i3c_master_unregister
> while the work mentioned above will be used. The sequence of operations
> that may lead to a UAF bug is as follows:
> 
> [...]

Applied, thanks!

[1/1] i3c: master: cdns: Fix use after free vulnerability in cdns_i3c_master Driver Due to Race Condition
      https://git.kernel.org/abelloni/c/609366e7a06d

Best regards,

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com