the "mgr_rxbuf=off" option がpage_to_skb()で問題に

Important: kernel security and bug fix update
https://rhn.redhat.com/errata/RHSA-2014-1843.html

セキュリティホールじゃなくて、skbに反応したのでMEMO。
忘れたころにvNICの問題になったりするんだよね・・・

* Due to previous changes in the virtio-net driver, a Red Hat Enterprise
Linux 6.6 guest was unable to boot with the "mgr_rxbuf=off" option
specified. This was caused by providing the page_to_skb() function with an
incorrect packet length in the driver's Rx path. This problem has been
fixed and the guest in the described scenario can now boot successfully.
(BZ#1148693)