linux-kernel - Re: [1/2] powerpc/83xx: fix use-after-free in mpc831x_usb

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Message-ID: <3138c2fa-1e99-f672-2108-33dd1cf25ca2@web.de>
Date:   Wed, 10 Jul 2019 09:19:18 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Wen Yang <wen.yang99@....com.cn>, linuxppc-dev@...ts.ozlabs.org
Cc:     Markus.Elfring@....de,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Cheng Shengyu <cheng.shengyu@....com.cn>,
        Kumar Gala <galak@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Paul Mackerras <paulus@...ba.org>,
        Scott Wood <oss@...error.net>, kernel-janitors@...r.kernel.org,
        Xue Zhihong <xue.zhihong@....com.cn>,
        Yi Wang <wang.yi59@....com.cn>, linux-kernel@...r.kernel.org
Subject: Re: [1/2] powerpc/83xx: fix use-after-free in mpc831x_usb_cfg()

> The immr_node variable is still being used after the of_node_put() call,
> which may result in use-after-free.

Was any known source code analysis tool involved to point such
a questionable implementation detail out for further software
development considerations?

Regards,
Markus