Patch "xen/gntdev: Fix off-by-one error when unmapping with holes" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

xen/gntdev: Fix off-by-one error when unmapping with holes

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
xen-gntdev-fix-off-by-one-error-when-unmapping-with-holes.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Ross Lagerwall <[email protected]>
Date: Tue, 9 Jan 2018 12:10:21 +0000
Subject: xen/gntdev: Fix off-by-one error when unmapping with holes

From: Ross Lagerwall <[email protected]>

[ 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.

---
 drivers/xen/gntdev.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

@@ -378,10 +378,8 @@ static int unmap_grant_pages(struct gran
 		}
 		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);

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/xen-gntdev-fix-off-by-one-error-when-unmapping-with-holes.patch queue-4.4/xen-gntdev-fix-partial-gntdev_mmap-cleanup.patch