gst-ffmpeg: fix for Security Advisory CVE-2013-0849

The roq_decode_init function in libavcodec/roqvideodec.c in FFmpeg
before 1.1 allows remote attackers to have an unspecified impact via a
crafted (1) width or (2) height dimension that is not a multiple of
sixteen in id RoQ video data.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0849

(From OE-Core rev: 1a43a8054f51fbd542f3f037dc35f8b501e455bf)

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 37 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-roqvideodec-check-dimensions-validity.patch b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-roqvideodec-check-dimensions-validity.patch
new file mode 100644
index 0000000000..7e58afcf6b
--- /dev/null
+++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-roqvideodec-check-dimensions-validity.patch
@@ -0,0 +1,36 @@
+From 391e0fc6c90ced6656b74f50f3a487b6dc76ea63 Mon Sep 17 00:00:00 2001
+From: Michael Niedermayer <michaelni@gmx.at>
+Date: Thu, 29 Nov 2012 15:18:17 +0100
+Subject: [PATCH] roqvideodec: check dimensions validity
+
+Upstream-Status: Backport
+
+Commit 391e0fc6c90ced6656b74f50f3a487b6dc76ea63 release/0.7
+
+Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
+Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
+(cherry picked from commit 3ae610451170cd5a28b33950006ff0bd23036845)
+
+Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
+---
+ libavcodec/roqvideodec.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/libavcodec/roqvideodec.c b/libavcodec/roqvideodec.c
+index f0977f6..4e34231 100644
+--- a/gst-libs/ext/libav/libavcodec/roqvideodec.c
++++ b/gst-libs/ext/libav/libavcodec/roqvideodec.c
+@@ -157,6 +157,12 @@ static av_cold int roq_decode_init(AVCodecContext *avctx)
+     RoqContext *s = avctx->priv_data;
+ 
+     s->avctx = avctx;
++
++    if (avctx->width%16 || avctx->height%16) {
++         av_log_ask_for_sample(avctx, "dimensions not being a multiple of 16 are unsupported\n");
++         return AVERROR_PATCHWELCOME;
++    }
++
+     s->width = avctx->width;
+     s->height = avctx->height;
+     avcodec_get_frame_defaults(&s->frames[0]);
+-- 
diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb b/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb
index ad85fa2e9f..a3b2f5cf29 100644
--- a/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb
+++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb
@@ -35,6 +35,7 @@ SRC_URI = "http://gstreamer.freedesktop.org/src/${BPN}/${BPN}-${PV}.tar.bz2 \
            file://0001-mjpegdec-check-SE.patch \
            file://0001-alac-fix-nb_samples-order-case.patch \
            file://0001-h264-correct-ref-count-check-and-limit-fix-out-of-ar.patch \
+           file://0001-roqvideodec-check-dimensions-validity.patch \
 "
 
 SRC_URI[md5sum] = "7f5beacaf1312db2db30a026b36888c4"