[3.19.y-ckt stable] Patch "staging/dgnc: fix info leak in ioctl" has been added to staging queue

[Kamal Mostafa]

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

    staging/dgnc: fix info leak in ioctl

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt10.

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

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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>From 08ff793837e6afc2e2f44bdfe6949d071e22e502 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Salva=20Peir=C3=B3?= <speirofr at gmail.com>
Date: Wed, 14 Oct 2015 17:48:02 +0200
Subject: staging/dgnc: fix info leak in ioctl
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit 4b6184336ebb5c8dc1eae7f7ab46ee608a748b05 upstream.

The dgnc_mgmt_ioctl() code fails to initialize the 16 _reserved bytes of
struct digi_dinfo after the ->dinfo_nboards member. Add an explicit
memset(0) before filling the structure to avoid the info leak.

Signed-off-by: Salva Peiró <speirofr at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Reference: CVE-2015-7885
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/staging/dgnc/dgnc_mgmt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/dgnc/dgnc_mgmt.c b/drivers/staging/dgnc/dgnc_mgmt.c
index 5544a8e..78a8767 100644
--- a/drivers/staging/dgnc/dgnc_mgmt.c
+++ b/drivers/staging/dgnc/dgnc_mgmt.c
@@ -133,6 +133,7 @@ long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)

 		spin_lock_irqsave(&dgnc_global_lock, flags);

+		memset(&ddi, 0, sizeof(ddi));
 		ddi.dinfo_nboards = dgnc_NumBoards;
 		sprintf(ddi.dinfo_version, "%s", DG_PART);

--
1.9.1