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| author | Ross Lagerwall <ross.lagerwall@citrix.com> | 2018-01-09 15:10:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-03 12:19:45 +0300 |
| commit | 2ca929480b7b03c064c2258891f0bcd6f53122cc (patch) | |
| tree | b9950d826f85118ff3102b25e1ab1ac59610bc5b | |
| parent | 7f102d7af10cdbc9a90abb635c790f1071765421 (diff) | |
| download | linux-2ca929480b7b03c064c2258891f0bcd6f53122cc.tar.xz | |
xen/gntdev: Fix off-by-one error when unmapping with holes
[ Upstream commit 951a010233625b77cde3430b4b8785a9a22968d1 ]
If the requested range has a hole, the calculation of the number of
pages to unmap is off by one. Fix it.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/xen/gntdev.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index a4d749665c9f..44a9d8eb0eb4 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -378,10 +378,8 @@ static int unmap_grant_pages(struct grant_map *map, int offset, int pages) } range = 0; while (range < pages) { - if (map->unmap_ops[offset+range].handle == -1) { - range--; + if (map->unmap_ops[offset+range].handle == -1) break; - } range++; } err = __unmap_grant_pages(map, offset, range); |