commit aaa6452763cf944da72f16e0736554accb364703
author Nikita V. Shirokov <tehnerd@tehnerd.com> Sun Apr 22 21:16:48 2018 -0700
committer Daniel Borkmann <daniel@iogearbox.net> Mon Apr 23 11:28:34 2018 +0200
tree c4e08677572a19959fc98cf0bdf433aa2ae8940c
parent 48d7a07ba355c7056e66adcdd35379d12e48252b

bpf: fix virtio-net's length calc for XDP_PASS

In commit 6870de435b90 ("bpf: make virtio compatible w/
bpf_xdp_adjust_tail") i didn't account for vi->hdr_len during new
packet's length calculation after bpf_prog_run in receive_mergeable.
because of this all packets, if they were passed to the kernel,
were truncated by 12 bytes.

Fixes:6870de435b90 ("bpf: make virtio compatible w/ bpf_xdp_adjust_tail")
Reported-by: David Ahern <dsahern@gmail.com>

Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>