linux-kernel - Re: powerpc/83xx: fix use-after-free on mpc831x_usb

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Message-ID: <99840e11-e0e6-b3f4-e35b-56ef4ec39417@web.de>
Date:   Mon, 8 Jul 2019 17:21:48 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Wen Yang <wen.yang99@....com.cn>, linuxppc-dev@...ts.ozlabs.org
Cc:     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>,
        Xue Zhihong <xue.zhihong@....com.cn>,
        Yi Wang <wang.yi59@....com.cn>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: powerpc/83xx: fix use-after-free on mpc831x_usb_cfg()

> The np variable is still being used after the of_node_put() call,

> which may result in use-after-free.

> We fix this issue by calling of_node_put() after the last usage.


I imagine that this commit description can be improved a bit more
(by mentioning the influence of “immr_node”?).
How do you think about to omit the word “We” here?


> This patatch also do some cleanup.


Should the renaming of a jump label be contributed in a separate update
step of a small patch series besides a wording without a typo?

Regards,
Markus