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avcodec/hcom: Check the root entry and the right entries
Fixes: Segfault Fixes: 17991/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HCOM_fuzzer-5647235349479424 Also fixes related memleak 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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@ -66,8 +66,15 @@ static av_cold int hcom_init(AVCodecContext *avctx)
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s->dict[i].r = AV_RB16(avctx->extradata + 6 + 4 * i + 2);
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if (s->dict[i].l >= 0 &&
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(s->dict[i].l >= s->dict_entries ||
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s->dict[i].r >= s->dict_entries))
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s->dict[i].r >= s->dict_entries ||
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s->dict[i].r < 0 )) {
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av_freep(&s->dict);
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return AVERROR_INVALIDDATA;
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}
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}
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if (s->dict[0].l < 0) {
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av_freep(&s->dict);
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return AVERROR_INVALIDDATA;
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}
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avctx->sample_fmt = AV_SAMPLE_FMT_U8;
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