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Reject AdditiveQuantizer with zero-bit code size on deserialization #5506

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Reject AdditiveQuantizer with zero-bit code size on deserialization #5506

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4 changes: 4 additions & 0 deletions faiss/impl/index_read.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -821,6 +821,10 @@ static void read_AdditiveQuantizer(AdditiveQuantizer& aq, IOReader* f) {
}

aq.set_derived_values();
FAISS_THROW_IF_NOT_FMT(
aq.code_size > 0,
"invalid AdditiveQuantizer: nbits sum to 0 bits, code_size %zd",
aq.code_size);

// Sanity-check codebooks size without knowing the effective dimension.
// codebooks stores effective_d * total_codebook_size floats, so its
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