netdev - Re: [PATCH v2] net: usb: smsc95xx: Limit packet length to skb->len

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Message-ID: <20230316135237.3052d98c@kernel.org>
Date:   Thu, 16 Mar 2023 13:52:37 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Szymon Heidrich <szymon.heidrich@...il.com>
Cc:     steve.glendinning@...well.net, UNGLinuxDriver@...rochip.com,
        davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: usb: smsc95xx: Limit packet length to skb->len

On Thu, 16 Mar 2023 11:19:54 +0100 Szymon Heidrich wrote:
> Packet length retrieved from descriptor may be larger than
> the actual socket buffer length. In such case the cloned
> skb passed up the network stack will leak kernel memory contents.
> 
> Fixes: 2f7ca802bdae ("net: Add SMSC LAN9500 USB2.0 10/100 ethernet adapter driver")
> Signed-off-by: Szymon Heidrich <szymon.heidrich@...il.com>

Reviewed-by: Jakub Kicinski <kuba@...nel.org>