netdev - Re: possible proble with skb_pull() in smsc75xx_rx

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Message-ID: <381e90eb-a744-450b-967d-bc67afb0aa9c@gmail.com>
Date: Wed, 22 Nov 2023 22:44:16 +0100
From: Szymon Heidrich <szymon.heidrich@...il.com>
To: Oliver Neukum <oneukum@...e.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
 USB list <linux-usb@...r.kernel.org>
Subject: Re: possible proble with skb_pull() in smsc75xx_rx_fixup()

On 20/11/2023 13:35, Oliver Neukum wrote:
> On 16.11.23 21:09, Szymon Heidrich wrote:
>> Hello Oliver,
>>
>> Could you please give me some hints how this could be practically exploited to cause mischief?
> 
> Hi,
> 
> it seems to me like you can easily feed stuff that is not
> part of a packet into the network layer, but you cannot overflow the buffer.
> In other words, the issue exists, but using it to do harm is hard.
> 
>     Regards
>         Oliver
> 

Hello Olivier,

Perhaps I'm missing something but as far as I can tell I can't do here anything special compared
to crafting the packet itself. Please let me know in case I'm wrong.

Best regards,
Szymon