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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-22 22:02:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-09 17:54:59 +0100 |
| commit | de5102fd92de8d353fdf060375ed3ce859c83977 (patch) | |
| tree | 227aa5931953b4a681869c410181b449bea26ba0 | |
| parent | 55c97a763783540ee48a326a3e82fbdea42f8280 (diff) | |
| download | ffmpeg-de5102fd92de8d353fdf060375ed3ce859c83977.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>
| -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 9f964efb4d..8d17889582 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; } |