vhost: protect vring access done by application
vhost: protect vring access done by application

Besides the enqueue/dequeue API, other APIs of the builtin net
backend should also be protected.

Fixes: a3688046995f ("vhost: protect active rings from async ring changes")
Cc: stable@dpdk.org

Reported-by: Peng He <2393d1559a2805f70af59378da42dab8c50de596@icloud.com>
Signed-off-by: Tiwei Bie <f338cf29d7d69ff1bc99f755ebfb0eb0accd409e@intel.com>
Reviewed-by: Maxime Coquelin <9a2667dee3b90866bbc9c2696cff2b7d5616c95a@redhat.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk