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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-21 00:18:48 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-17 12:21:32 +0200 |
| commit | 3738a41830fbde1d4d6f950305278ba1cde01390 (patch) | |
| tree | 33c648baae4720b10025107dd1a562fe1ab778f7 | |
| parent | 53a6cdf89d694be1f075729f16e0a9e2dcbbcb78 (diff) | |
| download | ffmpeg-3738a41830fbde1d4d6f950305278ba1cde01390.tar.gz | |
avcodec/hevc_ps: Check delta_pocs in ff_hevc_decode_short_term_rps()
Fixes: integer overflow
Fixes: 2893/clusterfuzz-testcase-minimized-5809330567774208
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 2b44dcbc44e99daf9515753e9fd4c2e1ea53a2fa)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hevc_ps.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index 7b104e6143..a2c13faf0f 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -224,6 +224,12 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx, prev = 0; for (i = 0; i < rps->num_negative_pics; i++) { delta_poc = get_ue_golomb_long(gb) + 1; + if (delta_poc < 1 || delta_poc > 32768) { + av_log(avctx, AV_LOG_ERROR, + "Invalid value of delta_poc: %d\n", + delta_poc); + return AVERROR_INVALIDDATA; + } prev -= delta_poc; rps->delta_poc[i] = prev; rps->used[i] = get_bits1(gb); @@ -231,6 +237,12 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx, prev = 0; for (i = 0; i < nb_positive_pics; i++) { delta_poc = get_ue_golomb_long(gb) + 1; + if (delta_poc < 1 || delta_poc > 32768) { + av_log(avctx, AV_LOG_ERROR, + "Invalid value of delta_poc: %d\n", + delta_poc); + return AVERROR_INVALIDDATA; + } prev += delta_poc; rps->delta_poc[rps->num_negative_pics + i] = prev; rps->used[rps->num_negative_pics + i] = get_bits1(gb); |