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

Kamal Mostafa kamal at canonical.com
Thu Nov 12 20:39:35 UTC 2015


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

    [media] media/vivid-osd: 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

------

>From 1f7cfc480dc329f1a65e5c8835a1ce4d11630a81 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Salva=20Peir=C3=B3?= <speirofr at gmail.com>
Date: Wed, 7 Oct 2015 07:09:26 -0300
Subject: [media] media/vivid-osd: fix info leak in ioctl
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit eda98796aff0d9bf41094b06811f5def3b4c333c upstream.

The vivid_fb_ioctl() code fails to initialize the 16 _reserved bytes of
struct fb_vblank after the ->hcount 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: Hans Verkuil <hans.verkuil at cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab at osg.samsung.com>
Reference: CVE-2015-7884
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/media/platform/vivid/vivid-osd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/vivid/vivid-osd.c b/drivers/media/platform/vivid/vivid-osd.c
index 084d346..e15eef6 100644
--- a/drivers/media/platform/vivid/vivid-osd.c
+++ b/drivers/media/platform/vivid/vivid-osd.c
@@ -85,6 +85,7 @@ static int vivid_fb_ioctl(struct fb_info *info, unsigned cmd, unsigned long arg)
 	case FBIOGET_VBLANK: {
 		struct fb_vblank vblank;

+		memset(&vblank, 0, sizeof(vblank));
 		vblank.flags = FB_VBLANK_HAVE_COUNT | FB_VBLANK_HAVE_VCOUNT |
 			FB_VBLANK_HAVE_VSYNC;
 		vblank.count = 0;
--
1.9.1





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