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Merge branch 'read-vnet_hdr_sz-once'
authorDavid S. Miller <davem@davemloft.net>
Tue, 7 Feb 2017 03:41:27 +0000 (22:41 -0500)
committerDavid S. Miller <davem@davemloft.net>
Tue, 7 Feb 2017 03:41:27 +0000 (22:41 -0500)
Willem de Bruijn says:

====================
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>

Trivial merge