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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-22 22:02:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:44 +0100 |
| commit | 27b1e6cd86455a6f82dfc098760d50bd8481c50f (patch) | |
| tree | 9b4db970f13869752f83b0a9bd8843cef190a362 | |
| parent | d05aa7459f7ed3cc414957c254bab4505d2dae91 (diff) | |
| download | ffmpeg-27b1e6cd86455a6f82dfc098760d50bd8481c50f.tar.gz | |
avcodec/atrac3plus: Check split point in fill mode 3
Fixes: index 32 out of bounds for type 'int [32]'
Fixes: 18350/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC3P_fuzzer-5643794862571520
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 de5102fd92de8d353fdf060375ed3ce859c83977)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/atrac3plus.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/atrac3plus.c b/libavcodec/atrac3plus.c index 3e3bba801b..f135606e2a 100644 --- a/libavcodec/atrac3plus.c +++ b/libavcodec/atrac3plus.c @@ -456,6 +456,10 @@ static int decode_channel_wordlen(GetBitContext *gb, Atrac3pChanUnitCtx *ctx, } else if (chan->fill_mode == 3) { pos = ch_num ? chan->num_coded_vals + chan->split_point : ctx->num_quant_units - chan->split_point; + if (pos > FF_ARRAY_ELEMS(chan->qu_wordlen)) { + av_log(avctx, AV_LOG_ERROR, "Split point beyond array\n"); + pos = FF_ARRAY_ELEMS(chan->qu_wordlen); + } for (i = chan->num_coded_vals; i < pos; i++) chan->qu_wordlen[i] = 1; } |