linux-kernel - [PATCH 3.8 049/166] Btrfs: fix access_ok() check in btrfs_ioctl

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Message-Id: <1389822780-4729-50-git-send-email-kamal@canonical.com>
Date:	Wed, 15 Jan 2014 13:51:03 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Dan Carpenter <dan.carpenter@...cle.com>, Chris Mason <clm@...com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.8 049/166] Btrfs: fix access_ok() check in btrfs_ioctl_send()

3.8.13.16 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

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@...cle.com>
Reviewed-by: Jie Liu <jeff.liu@...cle.com>
Signed-off-by: Chris Mason <clm@...com>
Signed-off-by: Kamal Mostafa <kamal@...onical.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 321b7fb..a89d788 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -4555,8 +4555,8 @@ 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

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