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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-02-09 14:53:15 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-02-09 23:33:18 +0100 |
| commit | b0eec1391e1daeade456698b1aee9b2d43a6f538 (patch) | |
| tree | b1c5f0df2090c23457b6be4193b395784cba8fa8 /libavcodec | |
| parent | ac5d5046c8ef4988b36734effe42a2fae8547ce1 (diff) | |
| download | ffmpeg-b0eec1391e1daeade456698b1aee9b2d43a6f538.tar.gz | |
avcodec/midivid: Check vector index
Fixes: out of array read
Fixes: 20494/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MVDV_fuzzer-5681452423577600
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/midivid.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/midivid.c b/libavcodec/midivid.c index bb5105bd57..8d4c3b369e 100644 --- a/libavcodec/midivid.c +++ b/libavcodec/midivid.c @@ -126,6 +126,8 @@ static int decode_mvdv(MidiVidContext *s, AVCodecContext *avctx, AVFrame *frame) idx9bits--; idx = bytestream2_get_byte(gb) | (((idx9val >> (7 - idx9bits)) & 1) << 8); } + if (idx >= nb_vectors) + return AVERROR_INVALIDDATA; dsty[x +frame->linesize[0]] = vec[idx * 12 + 0]; dsty[x+1+frame->linesize[0]] = vec[idx * 12 + 3]; |