[3.8.y.z extended stable] Patch "Revert "uio: fix vma io range check in mmap"" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    Revert "uio: fix vma io range check in mmap"

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue

This patch is scheduled to be released in version 3.8.13.27.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From f3ad1d6b95db28da60d83b17be93d56b8a80bfbc Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Date: Tue, 17 Jun 2014 16:07:08 -0700
Subject: Revert "uio: fix vma io range check in mmap"

commit b29f680c4fe305902d02c1d5aa4968fe13a45fe6 upstream.

This reverts commit ddb09754e6c7239e302c7b675df9bbd415f8de5d.

Linus objected to this originally, I can see why it might be needed, but
given that no one spoke up defending this patch, I'm going to revert it.

If you have hardware that requires this change, please speak up in the
future and defend the patch.

Reported-by: Linus Torvalds <torvalds at linux-foundation.org>
Cc: Bin Wang <binw at marvell.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj at renesas.com>
Cc: Norbert Ciosek <norbertciosek at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/uio/uio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 354c095..9981b9b 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -657,7 +657,7 @@ static int uio_mmap_physical(struct vm_area_struct *vma)

 	if (mem->addr & ~PAGE_MASK)
 		return -ENODEV;
-	if (vma->vm_end - vma->vm_start > PAGE_ALIGN(mem->size))
+	if (vma->vm_end - vma->vm_start > mem->size)
 		return -EINVAL;

 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
--
1.9.1