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avcodec/hcadec: Check total_band_count against imdct_in size

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Fixes: index 128 out of bounds for type 'float [128]'
Fixes: 23465/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HCA_fuzzer-5089866596745216

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 2d96c94531)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-06-30 21:32:53 +02:00
parent 1ff86cb452
commit d25345bb00
1 changed files with 4 additions and 0 deletions
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4
libavcodec/hcadec.c
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@ -157,6 +157,10 @@ static av_cold int decode_init(AVCodecContext *avctx)
} else
return AVERROR_INVALIDDATA;
if (c->total_band_count > FF_ARRAY_ELEMS(c->ch->imdct_in))
return AVERROR_INVALIDDATA;
while (get_bits_left(gb) >= 32) {
chunk = get_bits_long(gb, 32);
if (chunk == MKBETAG('v', 'b', 'r', 0)) {