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| author | Anton Khirnov <anton@khirnov.net> | 2013-11-28 10:54:35 +0100 |
|---|---|---|
| committer | Reinhard Tartler <siretart@tauware.de> | 2014-05-31 20:05:19 -0400 |
| commit | c4033cd4eb921a9cc8deb513efc6d6a6ba3b2163 (patch) | |
| tree | 640d0677cebba1d6ca44239b9d2e0ad746a97b93 | |
| parent | 7f33a24e824c6d20cb941e6b20c5382becfbc923 (diff) | |
| download | ffmpeg-c4033cd4eb921a9cc8deb513efc6d6a6ba3b2163.tar.gz | |
h264: reject mismatching luma/chroma bit depths during sps parsing
There is no point in delaying the check and it avoids bugs with a
half-initialized context.
Fixes invalid reads.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
| -rw-r--r-- | libavcodec/h264.c | 6 | ||||
| -rw-r--r-- | libavcodec/h264_ps.c | 5 |
2 files changed, 5 insertions, 6 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c index 7d1945fc1e..d6e1ba1f40 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -4076,12 +4076,6 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){ if(avctx->has_b_frames < 2) avctx->has_b_frames= !s->low_delay; - if (h->sps.bit_depth_luma != h->sps.bit_depth_chroma) { - av_log_missing_feature(s->avctx, - "Different bit depth between chroma and luma", 1); - return AVERROR_PATCHWELCOME; - } - if (avctx->bits_per_raw_sample != h->sps.bit_depth_luma || h->cur_chroma_format_idc != h->sps.chroma_format_idc) { if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10) { diff --git a/libavcodec/h264_ps.c b/libavcodec/h264_ps.c index ee4711c147..5d7508276b 100644 --- a/libavcodec/h264_ps.c +++ b/libavcodec/h264_ps.c @@ -349,6 +349,11 @@ int ff_h264_decode_seq_parameter_set(H264Context *h){ } sps->bit_depth_luma = get_ue_golomb(&s->gb) + 8; sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8; + if (sps->bit_depth_chroma != sps->bit_depth_luma) { + av_log_missing_feature(s->avctx, + "Different bit depth between chroma and luma", 1); + goto fail; + } sps->transform_bypass = get_bits1(&s->gb); decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8); }else{ |