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avcodec/twinvqdec: Correct overflow in block align check 

Fixes: signed integer overflow: 538976288 * 8 cannot be represented in type 'int'
Fixes: 19126/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TWINVQ_fuzzer-5687464110325760

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-12-03 19:48:46 +01:00
parent 77ba9e3252
commit 4dc93ae3d7
1 changed files with 1 additions and 1 deletions
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2
libavcodec/twinvqdec.c
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@ -404,7 +404,7 @@ static av_cold int twinvq_decode_init(AVCodecContext *avctx)
tctx->frame_size = avctx->bit_rate * tctx->mtab->size
/ avctx->sample_rate + 8;
tctx->is_6kbps = 0;
if (avctx->block_align && avctx->block_align * 8 / tctx->frame_size > 1) {
if (avctx->block_align && avctx->block_align * 8LL / tctx->frame_size > 1) {
av_log(avctx, AV_LOG_ERROR,
"VQF TwinVQ should have only one frame per packet\n");
return AVERROR_INVALIDDATA;