Patch "ovl: use O_LARGEFILE in ovl_copy_up()" has been added to the 4.1-stable tree

Patch "ovl: use O_LARGEFILE in ovl_copy_up()" has been added to the 4.1-stable tree

[gregkh]

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

    ovl: use O_LARGEFILE in ovl_copy_up()

to the 4.1-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:
     ovl-use-o_largefile-in-ovl_copy_up.patch
and it can be found in the queue-4.1 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 0480334fa60488d12ae101a02d7d9e1a3d03d7dd Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Fri, 18 Sep 2015 11:45:12 +0100
Subject: ovl: use O_LARGEFILE in ovl_copy_up()

From: David Howells <dhowells@redhat.com>

commit 0480334fa60488d12ae101a02d7d9e1a3d03d7dd upstream.

Open the lower file with O_LARGEFILE in ovl_copy_up().

Pass O_LARGEFILE unconditionally in ovl_copy_up_data() as it's purely for
catching 32-bit userspace dealing with a file large enough that it'll be
mishandled if the application isn't aware that there might be an integer
overflow.  Inside the kernel, there shouldn't be any problems.

Reported-by: Ulrich Obergfell <uobergfe@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/overlayfs/copy_up.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -81,11 +81,11 @@ static int ovl_copy_up_data(struct path
 	if (len == 0)
 		return 0;
 
-	old_file = ovl_path_open(old, O_RDONLY);
+	old_file = ovl_path_open(old, O_LARGEFILE | O_RDONLY);
 	if (IS_ERR(old_file))
 		return PTR_ERR(old_file);
 
-	new_file = ovl_path_open(new, O_WRONLY);
+	new_file = ovl_path_open(new, O_LARGEFILE | O_WRONLY);
 	if (IS_ERR(new_file)) {
 		error = PTR_ERR(new_file);
 		goto out_fput;


Patches currently in stable-queue which might be from dhowells@redhat.com are

queue-4.1/ovl-fix-dentry-reference-leak.patch
queue-4.1/ovl-use-o_largefile-in-ovl_copy_up.patch