From: Jesper Dangaard Brouer <bro...@redhat.com> Date: Tue, 20 Feb 2018 14:31:59 +0100
> The virtio_net driver actually violates the original memory model of > XDP causing hard to debug crashes. Per request of John Fastabend, > instead of removing the XDP feature I'm fixing as much as possible. > While testing virtio_net with XDP_REDIRECT I found 4 different bugs. > > Patch-1: not enough tail-room for build_skb in receive_mergeable() > only option is to disable XDP_REDIRECT in receive_mergeable() > > Patch-2: XDP in receive_small() basically never worked (check wrong flag) > > Patch-3: fix memory leak for XDP_REDIRECT in error cases > > Patch-4: avoid crash when ndo_xdp_xmit is called on dev not ready for XDP > > In the longer run, we should consider introducing a separate receive > function when attaching an XDP program, and also change the memory > model to be compatible with XDP when attaching an XDP prog. Series applied, thanks Jesper.
