Re: [PATCH] net: openvswitch: datapath: fix data type in queue_gso_packets

From: Gustavo A. R. Silva
Date: Mon Nov 27 2017 - 10:04:35 EST



Quoting David Miller <davem@xxxxxxxxxxxxx>:

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

On Sat, Nov 25, 2017 at 2:14 PM, Gustavo A. R. Silva
<garsilva@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx>

Acked-by: Willem de Bruijn <willemb@xxxxxxxxxx>

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

Thanks!

Glad to help :)

Thanks
--
Gustavo A. R. Silva