[linux] 03/03: media/vivid-osd: fix info leak in ioctl (CVE-2015-7884)

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benh pushed a commit to branch sid
in repository linux.

commit b2076bbc3714434fb4244316f10446bce0f47157
Author: Ben Hutchings <ben at decadent.org.uk>
Date:   Sun Nov 8 15:01:04 2015 +0000

    media/vivid-osd: fix info leak in ioctl (CVE-2015-7884)
---
 debian/changelog                                   |  1 +
 ...ia-media-vivid-osd-fix-info-leak-in-ioctl.patch | 31 ++++++++++++++++++++++
 debian/patches/series                              |  1 +
 3 files changed, 33 insertions(+)

diff --git a/debian/changelog b/debian/changelog
index 3f03708..22996d8 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,7 @@ linux (4.2.5-2) UNRELEASED; urgency=medium
   * usbvision: fix overflow of interfaces array (CVE-2015-7833)
   * RDS: fix race condition when sending a message on unbound socket
     (CVE-2015-7990)
+  * media/vivid-osd: fix info leak in ioctl (CVE-2015-7884)
 
  -- Ben Hutchings <ben at decadent.org.uk>  Sun, 08 Nov 2015 14:47:40 +0000
 
diff --git a/debian/patches/bugfix/all/media-media-vivid-osd-fix-info-leak-in-ioctl.patch b/debian/patches/bugfix/all/media-media-vivid-osd-fix-info-leak-in-ioctl.patch
new file mode 100644
index 0000000..8d551da
--- /dev/null
+++ b/debian/patches/bugfix/all/media-media-vivid-osd-fix-info-leak-in-ioctl.patch
@@ -0,0 +1,31 @@
+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
+Origin: https://git.kernel.org/linus/eda98796aff0d9bf41094b06811f5def3b4c333c
+
+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>
+---
+ 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;
diff --git a/debian/patches/series b/debian/patches/series
index b55d509..45d3d1c 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -106,3 +106,4 @@ debian/target-fix-abi-change-in-4.2.4.patch
 debian/signal-fix-abi-change-in-4.2.4.patch
 bugfix/all/usbvision-fix-overflow-of-interfaces-array.patch
 bugfix/all/rds-fix-race-condition-when-sending-a-message-on-unbound-socket.patch
+bugfix/all/media-media-vivid-osd-fix-info-leak-in-ioctl.patch

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