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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-21 00:18:48 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-24 11:29:40 +0200 |
| commit | 2b44dcbc44e99daf9515753e9fd4c2e1ea53a2fa (patch) | |
| tree | f7ad176a83d88a0a5e0c51a1180b0db94cff45a4 | |
| parent | 37e8edc9f51545ad91cbdf7dbe796af93f011abe (diff) | |
| download | ffmpeg-2b44dcbc44e99daf9515753e9fd4c2e1ea53a2fa.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>
| -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 21dbaf85a5..37eae226e2 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -225,6 +225,12 @@ 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); @@ -232,6 +238,12 @@ 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); |