[3.11.y.z extended stable] Patch "Btrfs: fix access_ok() check in btrfs_ioctl_send()" has been added to staging queue

[Luis Henriques]

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

    Btrfs: fix access_ok() check in btrfs_ioctl_send()

to the linux-3.11.y-queue branch of the 3.11.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-3.11.y-queue

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

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From d032f34a9743e96eea5d894dcba271cdec455316 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter at oracle.com>
Date: Thu, 10 Jan 2013 03:57:25 -0500
Subject: Btrfs: fix access_ok() check in btrfs_ioctl_send()

commit 700ff4f095d78af0998953e922e041d75254518b upstream.

The closing parenthesis is in the wrong place.  We want to check
"sizeof(*arg->clone_sources) * arg->clone_sources_count" instead of
"sizeof(*arg->clone_sources * arg->clone_sources_count)".

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
Reviewed-by: Jie Liu <jeff.liu at oracle.com>
Signed-off-by: Chris Mason <clm at fb.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 fs/btrfs/send.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 0c87c6b..d4c34c8 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -4613,8 +4613,8 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
 	}

 	if (!access_ok(VERIFY_READ, arg->clone_sources,
-			sizeof(*arg->clone_sources *
-			arg->clone_sources_count))) {
+			sizeof(*arg->clone_sources) *
+			arg->clone_sources_count)) {
 		ret = -EFAULT;
 		goto out;
 	}
--
1.8.3.2