From: Greg KH <gregkh@linuxfoundation.org>
To: Szymon Heidrich <szymon.heidrich@gmail.com>
Cc: woojung.huh@microchip.com, UNGLinuxDriver@microchip.com,
kuba@kernel.org, davem@davemloft.net, edumazet@google.com,
pabeni@redhat.com, linux-usb@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel test robot <lkp@intel.com>
Subject: Re: [PATCH v2] net: usb: lan78xx: Limit packet length to skb->len
Date: Thu, 23 Mar 2023 17:29:44 +0100 [thread overview]
Message-ID: <ZBx+eGTSjRM8fvsf@kroah.com> (raw)
In-Reply-To: <20230317173606.91426-1-szymon.heidrich@gmail.com>
On Fri, Mar 17, 2023 at 06:36:06PM +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.
>
> Additionally prevent integer underflow when size is less than
> ETH_FCS_LEN.
>
> Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
> Signed-off-by: Szymon Heidrich <szymon.heidrich@gmail.com>
> Reported-by: kernel test robot <lkp@intel.com>
the test robot did not report the fact that the packet length needed to
be limited :(
next prev parent reply other threads:[~2023-03-23 16:30 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 15:32 [PATCH] net: usb: lan78xx: Limit packet length to skb->len Szymon Heidrich
2023-03-17 16:46 ` kernel test robot
2023-03-17 17:36 ` [PATCH v2] " Szymon Heidrich
2023-03-18 3:32 ` kernel test robot
2023-03-18 5:27 ` Jakub Kicinski
2023-03-18 7:08 ` kernel test robot
2023-03-23 16:29 ` Greg KH [this message]
2023-03-23 20:57 ` Szymon Heidrich
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