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avcodec/truemotion2rt: Fix rounding in input size check

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Fixes: Timeout
Fixes: 11332/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2RT_fuzzer-5678456612847616

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 2018-11-17 09:24:30 +01:00
parent 5982614af1
commit 7f22a4ebc9
1 changed files with 1 additions and 1 deletions
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2
libavcodec/truemotion2rt.c
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@ -116,7 +116,7 @@ static int truemotion2rt_decode_frame(AVCodecContext *avctx, void *data,
if (ret < 0)
return ret;
if (avctx->width / s->hscale * avctx->height * s->delta_size > avpkt->size * 8LL * 4)
if ((avctx->width + s->hscale - 1)/ s->hscale * avctx->height * s->delta_size > avpkt->size * 8LL * 4)
return AVERROR_INVALIDDATA;
ret = init_get_bits8(gb, avpkt->data + ret, avpkt->size - ret);