From: <gregkh@linuxfoundation.org>
To: ross.lagerwall@citrix.com, alexander.levin@verizon.com,
boris.ostrovsky@oracle.com, gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "xen/gntdev: Fix off-by-one error when unmapping with holes" has been added to the 4.14-stable tree
Date: Wed, 28 Feb 2018 16:27:35 +0100 [thread overview]
Message-ID: <1519831655247179@kroah.com> (raw)
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 4.14-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-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Wed Feb 28 16:23:28 CET 2018
From: Ross Lagerwall <ross.lagerwall@citrix.com>
Date: Tue, 9 Jan 2018 12:10:21 +0000
Subject: xen/gntdev: Fix off-by-one error when unmapping with holes
From: Ross Lagerwall <ross.lagerwall@citrix.com>
[ 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@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/xen/gntdev.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -380,10 +380,8 @@ 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 ross.lagerwall@citrix.com are
queue-4.14/xen-gntdev-fix-off-by-one-error-when-unmapping-with-holes.patch
queue-4.14/xen-gntdev-fix-partial-gntdev_mmap-cleanup.patch
reply other threads:[~2018-02-28 15:31 UTC|newest]
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