From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Mon, 12 Mar 2012 10:20:49 +0000 (+0000)
Subject: net/hyperv: Fix data corruption in rndis_filter_receive()
X-Git-Tag: v3.4-rc1~177^2~85
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef31bef6216db76950c38f1993b45953402f4c63;p=pandora-kernel.git

net/hyperv: Fix data corruption in rndis_filter_receive()

Limiting the memcpy to be the sizeof(struct rndis_message) can truncate
the message if there are Per-Packet-Info or Out-of-Band data.

In my earlier patch (commit 45326342), the unnecessary kmap_atomic and
kunmap_atomic surrounding this memcpy have been removed because the memory
in the receive buffer is always mapped. This memcpy is not necessary
either. To fix the bug, I removed the memcpy.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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