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avcodec/rpza: Check that there is enough data for all the blocks
Fixes: Timeout Fixes: 11547/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RPZA_fuzzer-5678435842654208 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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@ -105,6 +105,9 @@ static int rpza_decode_stream(RpzaContext *s)
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/* Number of 4x4 blocks in frame. */
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total_blocks = ((s->avctx->width + 3) / 4) * ((s->avctx->height + 3) / 4);
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if (total_blocks / 32 > bytestream2_get_bytes_left(&s->gb))
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return AVERROR_INVALIDDATA;
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if ((ret = ff_reget_buffer(s->avctx, s->frame)) < 0)
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return ret;
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pixels = (uint16_t *)s->frame->data[0];
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