Merge remote-tracking branch...

Merge remote-tracking branch 'remotes/stefanha/tags/rtl8139-cplus-tx-input-validation-pull-request' into staging

Pull request

# gpg: Signature made Mon Aug  3 13:08:25 2015 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/rtl8139-cplus-tx-input-validation-pull-request:
  rtl8139: check TCP Data Offset field (CVE-2015-5165)
  rtl8139: skip offload on short TCP header (CVE-2015-5165)
  rtl8139: check IP Total Length field (CVE-2015-5165)
  rtl8139: check IP Header Length field (CVE-2015-5165)
  rtl8139: skip offload on short Ethernet/IP header (CVE-2015-5165)
  rtl8139: drop tautologous if (ip) {...} statement (CVE-2015-5165)
  rtl8139: avoid nested ifs in IP header parsing (CVE-2015-5165)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>