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avcodec/hq_hqa: Check available space before reading slice offsets
Fixes: Timeout (43sec -> 18sec) Fixes: 14556/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HQ_HQA_fuzzer-5673543024508928 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -248,6 +248,9 @@ static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, size_t data_size)
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int width, height, quant;
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const uint8_t *src = ctx->gbc.buffer;
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if (bytestream2_get_bytes_left(&ctx->gbc) < 8 + 4*(num_slices + 1))
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return AVERROR_INVALIDDATA;
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width = bytestream2_get_be16(&ctx->gbc);
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height = bytestream2_get_be16(&ctx->gbc);
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