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| author | Mark Thompson <sw@jkqxz.net> | 2017-06-24 00:29:14 +0100 |
|---|---|---|
| committer | Mark Thompson <sw@jkqxz.net> | 2017-08-05 23:54:35 +0100 |
| commit | 1329c08ad6d2ddb304858f2972c67b508e8b0f0e (patch) | |
| tree | 8c1722431d98dd4c356514c46e99238837c9405a /libavcodec/hevc_ps.c | |
| parent | b88da98b34809dedf8882d43ed543632ed233538 (diff) | |
| download | ffmpeg-streaming-1329c08ad6d2ddb304858f2972c67b508e8b0f0e.zip ffmpeg-streaming-1329c08ad6d2ddb304858f2972c67b508e8b0f0e.tar.gz | |
hevc: Validate the number of long term reference pictures
This would overflow if the stream contained a value greater than the
maximum allowed by the standard (32).
Diffstat (limited to 'libavcodec/hevc_ps.c')
| -rw-r--r-- | libavcodec/hevc_ps.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index 74906fd..2603e6d 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -883,6 +883,12 @@ int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id, sps->long_term_ref_pics_present_flag = get_bits1(gb); if (sps->long_term_ref_pics_present_flag) { sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb); + if (sps->num_long_term_ref_pics_sps > HEVC_MAX_LONG_TERM_REF_PICS) { + av_log(avctx, AV_LOG_ERROR, "Too many long term ref pics: %d.\n", + sps->num_long_term_ref_pics_sps); + ret = AVERROR_INVALIDDATA; + goto err; + } for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) { sps->lt_ref_pic_poc_lsb_sps[i] = get_bits(gb, sps->log2_max_poc_lsb); sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb); |
