Module: libav Branch: release/0.8 Commit: c4033cd4eb921a9cc8deb513efc6d6a6ba3b2163
Author: Anton Khirnov <[email protected]> Committer: Reinhard Tartler <[email protected]> Date: Thu Nov 28 10:54:35 2013 +0100 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:[email protected] --- libavcodec/h264.c | 6 ------ libavcodec/h264_ps.c | 5 +++++ 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/libavcodec/h264.c b/libavcodec/h264.c index 7d1945f..d6e1ba1 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 ee4711c..5d75082 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{ _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
