linux-phytec-fsl

Merge branch 'read-vnet_hdr_sz-once'

Willem de Bruijn says:

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read vnet_hdr_sz once

Tuntap devices allow concurrent use and update of field vnet_hdr_sz.
Read the field once to avoid TOCTOU.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>