From mboxrd@z Thu Jan 1 00:00:00 1970 From: Willem de Bruijn Subject: [PATCH net 0/2] read vnet_hdr_sz once Date: Fri, 3 Feb 2017 18:20:47 -0500 Message-ID: <20170203232049.38982-1-willemdebruijn.kernel@gmail.com> Cc: davem@davemloft.net, Willem de Bruijn To: netdev@vger.kernel.org Return-path: Received: from mail-qt0-f196.google.com ([209.85.216.196]:34105 "EHLO mail-qt0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752441AbdBCXUz (ORCPT ); Fri, 3 Feb 2017 18:20:55 -0500 Received: by mail-qt0-f196.google.com with SMTP id w20so7551601qtb.1 for ; Fri, 03 Feb 2017 15:20:54 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: From: Willem de Bruijn Tuntap devices allow concurrent use and update of field vnet_hdr_sz. Read the field once to avoid TOCTOU. Willem de Bruijn (2): tun: read vnet_hdr_sz once macvtap: read vnet_hdr_size once drivers/net/macvtap.c | 4 ++-- drivers/net/tun.c | 10 ++++++---- 2 files changed, 8 insertions(+), 6 deletions(-) -- 2.11.0.483.g087da7b7c-goog