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

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Message-ID: <73f614e6-796e-415d-9954-8a94105f5e1c@suse.com>
Date: Mon, 20 Nov 2023 13:35:14 +0100
From: Oliver Neukum <oneukum@...e.com>
To: Szymon Heidrich <szymon.heidrich@...il.com>,
 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 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