From: Michael S. Tsirkin <mst@redhat.com>
Date: Sun, 23 Jun 2013 14:26:58 +0000 (+0300)
Subject: macvtap: fix recovery from gup errors
X-Git-Tag: v3.2.50~80
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34a3c5bb43d7acc16d9a6d65d4b7d963060c5ca8;p=pandora-kernel.git

macvtap: fix recovery from gup errors

[ Upstream commit 4c7ab054ab4f5d63625508ed6f8a607184cae7c2 ]

get user pages might fail partially in macvtap zero copy
mode. To recover we need to put all pages that we got,
but code used a wrong index resulting in double-free
errors.

Reported-by: Brad Hubbard <bhubbard@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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