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| author | Ross Lagerwall <ross.lagerwall@citrix.com> | 2018-01-09 12:10:21 +0000 |
|---|---|---|
| committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2018-01-10 08:38:17 -0500 |
| commit | 951a010233625b77cde3430b4b8785a9a22968d1 (patch) | |
| tree | 727e81424bd99be25ad0d9ac96114a847bb23f1a /drivers/xen | |
| parent | 66a640e7823da803fdb68d5d88f7a8fbd11c29e6 (diff) | |
| download | linux-stable-951a010233625b77cde3430b4b8785a9a22968d1.tar.gz linux-stable-951a010233625b77cde3430b4b8785a9a22968d1.tar.bz2 linux-stable-951a010233625b77cde3430b4b8785a9a22968d1.zip | |
xen/gntdev: Fix off-by-one error when unmapping with holes
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>
Diffstat (limited to 'drivers/xen')
| -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 57efbd3b053b..d3391a1e3796 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -380,10 +380,8 @@ 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); |