netdev - [BUG] acess_ok() missing from zerocopy_sg_from

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Message-ID: <1370306052.24311.193.camel@edumazet-glaptop>
Date:	Mon, 03 Jun 2013 17:34:12 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [BUG] acess_ok() missing from zerocopy_sg_from_iovec()

It looks like access_ok(VERIFY_READ, base, len) checks are missing in
drivers/net/tun.c & drivers/net/macvtap.c before the
get_user_pages_fast() calls.

Or am I missing something ?

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