netdev - Re: [PATCH] net: qcom/emac: fix UAF in emac

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Date:   Sat, 10 Jul 2021 09:57:17 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     Timur Tabi <timur@...nel.org>
Cc:     David Miller <davem@...emloft.net>, kuba@...nel.org,
        netdev <netdev@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: qcom/emac: fix UAF in emac_remove

On Sat, 10 Jul 2021 00:02:26 -0500
Timur Tabi <timur@...nel.org> wrote:

> On Fri, Jul 9, 2021 at 9:24 AM Pavel Skripkin <paskripkin@...il.com>
> wrote:
> >
> > adpt is netdev private data and it cannot be
> > used after free_netdev() call. Using adpt after free_netdev()
> > can cause UAF bug. Fix it by moving free_netdev() at the end of the
> > function.
> 
> Please spell out what "UAF" means, thanks.  If you fix that, then
> 
> Acked-by: Timur Tabi <timur@...nel.org>
> 
> Thanks.

Hi, Timur!

Thank you for feedback. 


David has already applied this pacth. So, should I send v2 or maybe
revert + v2? I haven't been in such situations yet :)




With regards,
Pavel Skripkin