Re: [PATCH net V2] virtio-net: drop NETIF_F_FRAGLIST

From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Thu, 6 Aug 2015 16:13:11 +0300

On Wed, Aug 05, 2015 at 10:34:04AM +0800, Jason Wang wrote:

quoted

virtio declares support for NETIF_F_FRAGLIST, but assumes
that there are at most MAX_SKB_FRAGS + 2 fragments which isn't
always true with a fraglist.

A longer fraglist in the skb will make the call to skb_to_sgvec overflow
the sg array, leading to memory corruption.

Drop NETIF_F_FRAGLIST so we only get what we can handle.

Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <redacted>

I noticed only now that this didn't Cc Dave, so of course it's
not applied.

CC:'ing me isn't the requirement. CC:'ing netdev is, which he
did.  If you check patchwork, it's there in the queue.

I'm just behind and heavily backlogged because I've been working
on other things.