mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/truemotion1: Check that the input has enough space for a minimal index_stream
Fixes: Timeout (18sec -> 0.4sec) Fixes: 17585/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION1_fuzzer-5117015135617024 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -444,6 +444,8 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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if (s->flags & FLAG_KEYFRAME) {
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/* no change bits specified for a keyframe; only index bytes */
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s->index_stream = s->mb_change_bits;
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if (s->avctx->width * s->avctx->height / 2048 + header.header_size > s->size)
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return AVERROR_INVALIDDATA;
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} else {
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/* one change bit per 4x4 block */
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s->index_stream = s->mb_change_bits +
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