Fix buffer overflow in compression int_test. - #975
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`IntCodec::DecompressAndZeroPad` zero-pads the output buffer up to the nearest vector lane boundary (`hwy::RoundUpTo(num, Lanes(d))`). In `TestUnalignedOffset`, allocating only `num_decompressed` elements for `dec2` resulted in out-of-bounds writes when `num_decompressed` was smaller than the vector lane count, causing a heap-buffer-overflow under HWASAN. Allocate `RoundUpTo(num_decompressed, hn::Lanes(d))` elements for `dec2` in `TestUnalignedOffset`. Additionally, pass the buffer size in bytes (`num * sizeof(T)`) to `MaybeCheckInitialized` in `TestSmallDequantize`. PiperOrigin-RevId: 962465936
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Fix buffer overflow in compression int_test.
IntCodec::DecompressAndZeroPadzero-pads the output buffer up to the nearest vector lane boundary (hwy::RoundUpTo(num, Lanes(d))). InTestUnalignedOffset, allocating onlynum_decompressedelements fordec2resulted in out-of-bounds writes whennum_decompressedwas smaller than the vector lane count, causing a heap-buffer-overflow under HWASAN.Allocate
RoundUpTo(num_decompressed, hn::Lanes(d))elements fordec2inTestUnalignedOffset. Additionally, pass the buffer size in bytes (num * sizeof(T)) toMaybeCheckInitializedinTestSmallDequantize.