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authorYue Tao <Yue.Tao@windriver.com>2014-08-29 14:46:18 +0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-10-18 16:14:05 +0200
commit3503fe8e74b15b8376b6c96dc309954d0bdf4a1c (patch)
tree60893e67660edba44a004d41109bc658a0eb23eb /meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13
parente17e8151776ed6fbf651455cbd25e92ebbd33b75 (diff)
downloadpoky-3503fe8e74b15b8376b6c96dc309954d0bdf4a1c.tar.gz
gst-ffmpeg: Security Advisory - ffmpeg - CVE-2013-4358
libavcodec/h264.c in FFmpeg before 0.11.4 allows remote attackers to cause a denial of service (crash) via vectors related to alternating bit depths in H.264 data. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-4358 (From OE-Core rev: 6a029bee3da097b9ed8c421fcd5ea61cd1a31b34) Signed-off-by: Yue Tao <Yue.Tao@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13')
-rw-r--r--meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-h264-set-parameters-from-SPS-whenever-it-changes.patch145
1 files changed, 145 insertions, 0 deletions
diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-h264-set-parameters-from-SPS-whenever-it-changes.patch b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-h264-set-parameters-from-SPS-whenever-it-changes.patch
new file mode 100644
index 0000000000..05a9de3334
--- /dev/null
+++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-h264-set-parameters-from-SPS-whenever-it-changes.patch
@@ -0,0 +1,145 @@
1gst-ffmpeg: h264: set parameters from SPS whenever it changes
2
3Fixes a crash in the fuzzed sample sample_varPAR.avi_s26638 with
4alternating bit depths.
5
6Upstream-Status: Backport
7
8Signed-off-by: Yue Tao <yue.tao@windriver.com>
9
10diff --git a/gst-libs/ext/libav/libavcodec/h264.c.old b/gst-libs/ext/libav/libavcodec/h264.c
11index 3621f41..718906a 100644
12--- a/gst-libs/ext/libav/libavcodec/h264.c.old
13+++ b/gst-libs/ext/libav/libavcodec/h264.c
14@@ -2491,6 +2491,34 @@ int ff_h264_get_profile(SPS *sps)
15 return profile;
16 }
17
18+static int h264_set_parameter_from_sps(H264Context *h)
19+{
20+ MpegEncContext *s = &h->s;
21+ AVCodecContext * avctx= s->avctx;
22+
23+ if (s->flags& CODEC_FLAG_LOW_DELAY ||
24+ (h->sps.bitstream_restriction_flag && !h->sps.num_reorder_frames))
25+ s->low_delay=1;
26+
27+ if(avctx->has_b_frames < 2)
28+ avctx->has_b_frames= !s->low_delay;
29+
30+ if (avctx->bits_per_raw_sample != h->sps.bit_depth_luma) {
31+ if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10) {
32+ avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
33+ h->pixel_shift = h->sps.bit_depth_luma > 8;
34+
35+ ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma);
36+ ff_h264_pred_init(&h->hpc, s->codec_id, h->sps.bit_depth_luma);
37+ dsputil_init(&s->dsp, s->avctx);
38+ } else {
39+ av_log(avctx, AV_LOG_DEBUG, "Unsupported bit depth: %d\n", h->sps.bit_depth_luma);
40+ return -1;
41+ }
42+ }
43+ return 0;
44+}
45+
46 /**
47 * decodes a slice header.
48 * This will also call MPV_common_init() and frame_start() as needed.
49@@ -2505,7 +2533,7 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
50 MpegEncContext * const s0 = &h0->s;
51 unsigned int first_mb_in_slice;
52 unsigned int pps_id;
53- int num_ref_idx_active_override_flag;
54+ int num_ref_idx_active_override_flag, ret;
55 unsigned int slice_type, tmp, i, j;
56 int default_ref_list_done = 0;
57 int last_pic_structure;
58@@ -2569,7 +2597,17 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
59 av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
60 return -1;
61 }
62- h->sps = *h0->sps_buffers[h->pps.sps_id];
63+
64+ if (h->pps.sps_id != h->current_sps_id ||
65+ h0->sps_buffers[h->pps.sps_id]->new) {
66+ h0->sps_buffers[h->pps.sps_id]->new = 0;
67+
68+ h->current_sps_id = h->pps.sps_id;
69+ h->sps = *h0->sps_buffers[h->pps.sps_id];
70+
71+ if ((ret = h264_set_parameter_from_sps(h)) < 0)
72+ return ret;
73+ }
74
75 s->avctx->profile = ff_h264_get_profile(&h->sps);
76 s->avctx->level = h->sps.level_idc;
77@@ -3811,26 +3811,8 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
78 case NAL_SPS:
79 init_get_bits(&s->gb, ptr, bit_length);
80 ff_h264_decode_seq_parameter_set(h);
81-
82- if (s->flags& CODEC_FLAG_LOW_DELAY ||
83- (h->sps.bitstream_restriction_flag && !h->sps.num_reorder_frames))
84- s->low_delay=1;
85-
86- if(avctx->has_b_frames < 2)
87- avctx->has_b_frames= !s->low_delay;
88-
89- if (avctx->bits_per_raw_sample != h->sps.bit_depth_luma) {
90- if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10) {
91- avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
92- h->pixel_shift = h->sps.bit_depth_luma > 8;
93-
94- ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma);
95- ff_h264_pred_init(&h->hpc, s->codec_id, h->sps.bit_depth_luma);
96- dsputil_init(&s->dsp, s->avctx);
97- } else {
98- av_log(avctx, AV_LOG_DEBUG, "Unsupported bit depth: %d\n", h->sps.bit_depth_luma);
99- return -1;
100- }
101+ if (h264_set_parameter_from_sps(h) < 0) {
102+ return -1;
103 }
104 break;
105 case NAL_PPS:
106diff --git a/gst-libs/ext/libav/libavcodec/h264.h.old b/gst-libs/ext/libav/libavcodec/h264.h
107index e3cc815..b77ad98 100644
108--- a/gst-libs/ext/libav/libavcodec/h264.h.old
109+++ b/gst-libs/ext/libav/libavcodec/h264.h
110@@ -202,6 +202,7 @@ typedef struct SPS{
111 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
112 int residual_color_transform_flag; ///< residual_colour_transform_flag
113 int constraint_set_flags; ///< constraint_set[0-3]_flag
114+ int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS
115 }SPS;
116
117 /**
118@@ -333,6 +334,7 @@ typedef struct H264Context{
119 int emu_edge_width;
120 int emu_edge_height;
121
122+ unsigned current_sps_id; ///< id of the current SPS
123 SPS sps; ///< current sps
124
125 /**
126diff --git a/gst-libs/ext/libav/libavcodec/h264_ps.c.old b/gst-libs/ext/libav/libavcodec/h264_ps.c
127index 7491807..0929098 100644
128--- a/gst-libs/ext/libav/libavcodec/h264_ps.c.old
129+++ b/gst-libs/ext/libav/libavcodec/h264_ps.c
130@@ -438,10 +438,13 @@ int ff_h264_decode_seq_parameter_set(H264Context *h){
131 sps->timing_info_present_flag ? sps->time_scale : 0
132 );
133 }
134+ sps->new = 1;
135
136 av_free(h->sps_buffers[sps_id]);
137- h->sps_buffers[sps_id]= sps;
138- h->sps = *sps;
139+ h->sps_buffers[sps_id] = sps;
140+ h->sps = *sps;
141+ h->current_sps_id = sps_id;
142+
143 return 0;
144 fail:
145 av_free(sps);