netdev - Re: [PATCH] net: openvswitch: datapath: fix data type in queue_gso

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Date:   Mon, 27 Nov 2017 02:16:20 +0900 (KST)
From:   David Miller <davem@...emloft.net>
To:     willemdebruijn.kernel@...il.com
Cc:     garsilva@...eddedor.com, pshelar@...ira.com, willemb@...gle.com,
        netdev@...r.kernel.org, dev@...nvswitch.org,
        linux-kernel@...r.kernel.org, steffen.klassert@...unet.com
Subject: Re: [PATCH] net: openvswitch: datapath: fix data type in
 queue_gso_packets

From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Date: Sat, 25 Nov 2017 16:15:01 -0500

> On Sat, Nov 25, 2017 at 2:14 PM, Gustavo A. R. Silva
> <garsilva@...eddedor.com> wrote:
>> gso_type is being used in binary AND operations together with SKB_GSO_UDP.
>> The issue is that variable gso_type is of type unsigned short and
>> SKB_GSO_UDP expands to more than 16 bits:
>>
>> SKB_GSO_UDP = 1 << 16
>>
>> this makes any binary AND operation between gso_type and SKB_GSO_UDP to
>> be always zero, hence making some code unreachable and likely causing
>> undesired behavior.
>>
>> Fix this by changing the data type of variable gso_type to unsigned int.
>>
>> Addresses-Coverity-ID: 1462223
>> Fixes: 0c19f846d582 ("net: accept UFO datagrams from tuntap and packet")
>> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> 
> Acked-by: Willem de Bruijn <willemb@...gle.com>

Applied and I'll queued this up with Willem's changes for -stable.

Thanks!