Patch "[media] cx24117: fix a buffer overflow when checking userspace params" has been added to the 3.14-stable tree

Patch "[media] cx24117: fix a buffer overflow when checking userspace params" has been added to the 3.14-stable tree

[gregkh]

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

    [media] cx24117: fix a buffer overflow when checking userspace params

to the 3.14-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:
     cx24117-fix-a-buffer-overflow-when-checking-userspace-params.patch
and it can be found in the queue-3.14 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 82e3b88b679049f043fe9b03991d6d66fc0a43c8 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Date: Tue, 28 Apr 2015 19:03:59 -0300
Subject: [media] cx24117: fix a buffer overflow when checking userspace params

From: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

commit 82e3b88b679049f043fe9b03991d6d66fc0a43c8 upstream.

The maximum size for a DiSEqC command is 6, according to the
userspace API. However, the code allows to write up much more values:
	drivers/media/dvb-frontends/cx24116.c:983 cx24116_send_diseqc_msg() error: buffer overflow 'd->msg' 6 <= 23

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/dvb-frontends/cx24117.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/dvb-frontends/cx24117.c
+++ b/drivers/media/dvb-frontends/cx24117.c
@@ -1043,7 +1043,7 @@ static int cx24117_send_diseqc_msg(struc
 	dev_dbg(&state->priv->i2c->dev, ")\n");
 
 	/* Validate length */
-	if (d->msg_len > 15)
+	if (d->msg_len > sizeof(d->msg))
 		return -EINVAL;
 
 	/* DiSEqC message */


Patches currently in stable-queue which might be from mchehab@osg.samsung.com are

queue-3.14/cx24116-fix-a-buffer-overflow-when-checking-userspace-params.patch
queue-3.14/saa7164-fix-querycap-warning.patch
queue-3.14/s5h1420-fix-a-buffer-overflow-when-checking-userspace-params.patch
queue-3.14/cx24117-fix-a-buffer-overflow-when-checking-userspace-params.patch
queue-3.14/af9013-don-t-accept-invalid-bandwidth.patch