[ovs-dev] [PATCH] datapath: ensure UFO traffic is actually fragmented

[Gregory Rose]

On 6/15/2018 1:05 PM, Ben Pfaff wrote:
> On Tue, May 29, 2018 at 06:06:19PM +0000, Neal Shrader via dev wrote:
>> While investigating a kernel panic, our team noticed that UDP traffic
>> recieved by an STT tunnel will always have a gso_type set as SKB_GSO_UDP.
>> After decap, we also noticed that traffic that had this flag set had its
>> fragmentation type set as OVS_FRAG_TYPE_FIRST during key extraction.
>>
>> When the connection tracker encounters this, it assumes it's already
>> dealing with fragmented traffic, which might not be the case.  This
>> patch simply ensures we're dealing with an actual fragment before sending
>> the skb off to be reassembled.
>>
>> Reported-by: Johannes Erdfelt <johannes at erdfelt.com>
>> Reported-at: https://mail.openvswitch.org/pipermail/ovs-discuss/2018-May/046800.html
>> Signed-off-by: Neal Shrader <neal at digitalocean.com>
> Thanks a lot for the patch.
>
> Greg, have you taken a look at this?

I had it flagged for review but have not yet had a chance to get to it.  
I'll do so now.

Thanks,

- Greg